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Monyck Lopes

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University of East Anglia

University of Maiduguri

University of Tromsø

Mabrouk Elgabry

Alexandria University

Deepthi Lakmini

University of Ruhuna

University Of Delhi South Campus

Sağlık Bilimleri Üniversitesi

Hulya Yilmaz-aydogan

Istanbul University

Galina Brychkova

National University of Ireland, Galway

Edson Luiz Furtado

Universidade Estadual Paulista "Júlio de Mesquita Filho"

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Papers by Monyck Lopes

RIZOBACTÉRIAS PARA A CONSERVAÇÃO DA Apuleia leiocarpa (Vogel) J.F.Macbr

Microbiologia básica e aplicada, 2022

Artemisia annua L. and Its Derivatives: Their Antiviral Effects on COVID-19 and Possible Mechanisms

Journal of Exploratory Research in Pharmacology, 2022

COVID-19 is a worldwide pandemic. Currently, there are a few approved effective antiviral drugs a... more COVID-19 is a worldwide pandemic. Currently, there are a few approved effective antiviral drugs against COV-ID-19. Therefore, an effective way to treat an emerging disease is to use existing medicines, which usually have a safety profile. A large number of compounds are produced from traditional medicinal plants and some of them that have antiviral activity could be used as therapeutics, such as Artemisia annua L. Here, we update the information on the therapeutic effects and possible antiviral mechanisms of A. annua and their derivatives against severe acute respiratory syndrome coronavirus (SARS-CoV-2) infection will be updated. The A. annua derivatives might be effective alternatives for COVID-19 treatment. A. annua might act against the SARS-CoV-2 infection by inhibiting its invasion, ACE2, CD147, and TMPRSS2 expression, virus replication, reducing oxidative stress and inflammation by attenuating Nrf2 and NF-kB signaling, and mitigating lung damage in patients with COVID-19. However, clinical effectiveness needs to be demonstrated.

Efeito da intensidade de luz no desenvolvimento vascular e na qualidade de mudas de Paricá

Scientia Plena, 2022

A luz é um fator ambiental essencial no crescimento de plantas. Por isso, este estudo objetiva an... more A luz é um fator ambiental essencial no crescimento de plantas. Por isso, este estudo objetiva analisar a influência da intensidade luminosa no desenvolvimento vascular e na qualidade de mudas de paricá (Schizolobium parahyba var. amazonicum Huber ex Ducke). As mudas foram alocadas sob pleno sol, baixa, média e alta intensidade de sombreamento (0%, 25%, 50% e 75% de sombreamento, respectivamente). Foram medidos o diâmetro, a altura, o índice SPAD, a produção de biomassa e o desenvolvimento vascular do caule (xilema, câmbio e floema). Calculou-se ainda o índice de qualidade de Dickson (IQD). Os maiores valores de produção de biomassa, desenvolvimento vascular e IQD foram encontrados nas mudas cultivadas sob baixa intensidade de sombreamento. Concluiu-se que a intensidade de luz influencia os parâmetros de crescimento em paricá, e que o desenvolvimento vascular do caule e os atributos morfológicos apresentam correlação direta, explicando o crescimento radial e o aumento da qualidade d...

Histórico e desafios da pecuária bovina na Amazônia

Challenges to cattle ranching in the Brazilian Amazon

Cattle ranching emerges as one of the main activities in the Brazilian Amazon. In the last decade... more Cattle ranching emerges as one of the main activities in the Brazilian Amazon. In the last decades, this activity expanded strongly in that region, a growth that should continue in the future. This manuscript summarizes the challenges and evolution of cattle ranching in the Brazilian Amazon, including their historical beginning. Emphasis is placed on the past 40 years of research experience accumulated by Embrapa on management and reclamation of degraded pasture areas in the Amazon. This document represents an important contribution by Embrapa in this strategic area for food security, environmental preservation and economic growth in the Amazon region. The expectation is that this paper might provide a new view on this oftenmisunderstood area of knowledge, influencing research investment decisions and public policies in the Brazilian Amazon.

CRESCIMENTO E ALOCAÇÃO DE CARBONO EM MUDAS DE Parkia gigantocarpa CULTIVADAS SOB SOMBREAMENTO

Pesquisa e Aplicação em Ciências Biológicas, 2021

Sob estresses abióticos, como sombreamento, as plantas apresentam plasticidade fenotípica, modifi... more Sob estresses abióticos, como sombreamento, as plantas apresentam plasticidade fenotípica, modificando seu desenvolvimento para sobreviverem a diferentes ambientes. Assim o objetivo desse estudo é verificar o efeito do sombreamento no crescimento e na alocação de carbono de mudas de Parkia gigantocarpa Ducke, também conhecida como faveira-atanã. As mudas foram alocadas sob pleno sol, baixa, média e alta intensidade de sombreamento (0%, 25%, 50% e 75% de sombreamento, respectivamente). Os parâmetros avaliados foram: altura, diâmetro, teor de clorofila, área foliar específica, produção de biomassa e alocação de carbono. O sombreamento alterou o crescimento de P. gigantocarpa. Como mecanismos de sua plasticidade fisiológica, essa espécie aumentou a clorofila e a área foliar específica, possibilitando sua adaptação a todos os níveis de sombreamento. O padrão de alocação do carbono não foi afetado pelos tratamentos. Ademais, considerando seu crescimento e produção de biomassa, essa espéc...

A Vitamina B12 Pode Ser Uma Alternativa No Tratamento De COVID-19?

Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está... more Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição 4.0 Internacional (CC BY 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. A Atena Editora não se responsabiliza por eventuais mudanças ocorridas nos endereços convencionais ou eletrônicos citados nesta obra. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação.

Successful Plant Growth-Promoting Microbes: Inoculation Methods and Abiotic Factors

Frontiers in Sustainable Food Systems, 2021

Plant-microbe interactions have been the subject of several biotechnological studies, seeking sus... more Plant-microbe interactions have been the subject of several biotechnological studies, seeking sustainable development and environmental conservation. The inoculation of plant growth-promoting microbes (PGPM) in agricultural crops is considered an environmental-friendly alternative to chemical fertilization. Microbial inoculants are mainly inoculated onto seeds, roots and soil. PGPM improve plant growth by enhancing the availability of nutrients, the regulation of phytohormones, and by increasing plant tolerance against biotic and abiotic stresses. One of the main obstacles with PGPM research are the inconsistent results, which may be the result of inoculation methods and abiotic factors, such as soil (nutrient or heavy metal contents and pH), water availability, light intensity and temperature. This review addresses how the PGPM inoculants act on plant growth, what mechanisms they use to survive under stressful environmental conditions, and how inoculation methods and abiotic factor...

Efficiency of Biostimulants for Alleviating Shade Effects on Forage Grass

Journal of Agricultural Studies, 2021

Shade is considered an abiotic stress factor which reduce the primary metabolism and restricts no... more Shade is considered an abiotic stress factor which reduce the primary metabolism and restricts normal growth in forage grass in integrated systems. Biostimulants are beneficial in promoting growth and protecting plants against environmental stresses. This is the first study that links biostimulants and the primary metabolism of plants grown under contrasting light intensities. We investigated how the use of biostimulants modifies the primary metabolism, reducing the deleterious effects of shading in the development of tropical forage grass Brachiaria brizantha cv. BRS Piatã. The association of Pseudomonas fluorescens and Burkholderia pyrrocinia, inoculated by soil drench, were used as biostimulants. We measured leaf anatomy, plant growth, and biochemical parameters. The use of biostimulants increased the shade tolerance on B. brizantha by modifying leaf structure, increasing the chlorophyll content, and inducing the production of osmoregulants, such as carbohydrates and proteins. In...

BIOPROMOTORES E LUZ NO CRESCIMENTO DE Brachiaria brizantha

Agronomia: Elo da Cadeia Produtiva 5, Dec 3, 2019

Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atrib... more Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição 4.0 Internacional (CC BY 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais.

Effect of <i>Pseudomonas fluorescens</i> and <i>Burkholderia pyrrocinia</i> on the Growth Improvement and Physiological Responses in <i>Brachiaria brizantha</i>

American Journal of Plant Sciences, 2018

The use of beneficial microorganisms in forage grasses is a potentially advantageous technique fo... more The use of beneficial microorganisms in forage grasses is a potentially advantageous technique for a more sustainable pasture management by decreasing the need for chemical fertilization. Our aims were to determine the best method of microorganism inoculation on Brachiaria (Syn. Urochloa) brizantha cv. BRS Piatã, compare the responses of inoculated plants of this forage grass with fertilized and unfertilized controls and examine its effect on some morphological, physiological and biochemical responses. On the first experiment, three inoculation methods were tested: in the seed, seed and soil, and soil, with Pseudomonas fluorescens (BRM-32111) and Burkholderia pyrrocinia (BRM-32113). In the second experiment, fertilized and unfertilized plants were either inoculated with BRM-32111, BRM-32113 and co-inoculated (BRM-32111 + BRM-32113). In a final experiment, B. brizantha was inoculated by soil drenching with BRM-32111, BRM-32113 and co-inoculated (BRM-32111 + BRM-32113), and compared to fertilized-and unfertilized-controls. The inoculation by soil drenching, at seedling stage, was more effective than inoculation only in the seed or both in the seed and by soil drenching. The fertilizer may have suppressed the beneficial bacterial effects on the growth of B. brizantha. P. fluorescens and B. pyrrocinia co-inoculated increased nitrate, protein, nitrogen concentration, Spad index (chlorophyll content), leaf area, number of tillers, net photosynthesis and total biomass production of B. brizantha plants. Our results point out to a potentially valuable source of practic-How to cite this paper: dos

Light and plant growth-promoting rhizobacteria effects onBrachiaria brizanthagrowth and phenotypic plasticity to shade

Grass and Forage Science, 2017

This is the first report on the effect of light intensity and plant growth-promoting rhizobacteri... more This is the first report on the effect of light intensity and plant growth-promoting rhizobacteria (PGPR) on the growth of a tropical forage grass, being a relevant study to improve pasture management in conventional farming and integrated crop-livestock-forestry systems. In this study, our aim was to evaluate the effects of light intensity and Burkholderia pyrrocinia and Pseudomonas fluorescens inoculation on Brachiaria brizantha cv. BRS Piatã growth, and phenotypic plasticity to shade. The experiment was conducted in a semi-controlled environment. Seedlings of B. brizantha were allocated to full sun and shade. P. fluorescens and B. pyrrocinia were inoculated individually or co-inoculated by soil drench, 14 days after seedling emergence. We evaluated morphogenesis, structural and growth parameters. Irrespective of the light regime, co-inoculated plants had greater leaf area and SPAD index (chlorophyll content). Increase in total biomass production in co-inoculated plants was over 100% and 300%, under full sun and shade respectively. Co-inoculated P. fluorescens and B. pyrrocinia increased shade tolerance in B. brizantha, improving plant performance. Co-inoculation promoted growth in B. brizantha under both sun and shade, indicating its potential as a bio-fertilizer in conventional and integrated systems, especially in silvopastoral systems, where light availability to pasture growth may be limited.

Triagem de forrageiras para tolerância ao excesso de água no solo

Neste texto serão apresentadas resumidamente as principais respostas das plantas ao excesso de ág... more Neste texto serão apresentadas resumidamente as principais respostas das plantas ao excesso de água no solo, assim como as características morfoanatômicas e fisiológicas de plantas, em geral, e de gramíneas forrageiras, em particular, associadas à tolerância a esse estresse. Com base nessas informações, serão discutidas algumas estratégias de triagem de forrageiras ao excesso de água no solo, visando subsidiar programas de lançamento de cultivares de forrageiras no Brasil.

Screening for tolerance to waterlogging in forage plants

Morphophysiological Behavior and Cambial Activity in Seedlings of Two Amazonian Tree Species under Shade

Journal of Botany, 2015

Variations in light intensity can lead to important anatomical and morphophysiological changes in... more Variations in light intensity can lead to important anatomical and morphophysiological changes in plants. Aiming to increase knowledge about the Amazonian tree species, this study examines the influence of shade on the cambial activity and development ofParkia gigantocarpaDucke andSchizolobium parahybavar.amazonicum(Huber ex Ducke) Barneby seedlings. Seedlings of the two species were grown in a nursery under four shade intensities (treatments): full sun, low, moderate, and high shade (resp., 0%, 23%, 67%, and 73% of shade, or 2000, 1540, 660, and 540 µmol·m−2·s−1) obtained with polyethylene screens. We measured plant height, stem diameter, biomass production, stomatal conductance (gs), transpiration (E), photosynthesis (A), and cambial activity (CA) (xylem, cambium, and phloem). Also, we calculated the Dickson Quality Index (DQI). The highest values of biomass production,gs, E, A, and DQI, were found under full sun, inP. gigantocarpa, and under low shade intensity inS. parahyba. In...

Carbon compounds and chlorophyll contents in sorghum submitted to water deficit during three growth stages

International Journal of …, 2009

... Silva Lobato, MC Goncalves-Vidigal, RCL da Costa, BG dos Santos Filho, GAR Alves, WJ de Mello... more

Biotecnologia microbiana: inoculação, mecanismos de ação e benefícios às plantas

Research, Society and Development, 2021

O uso de microrganismos está sendo aderido globalmente como uma alternativa biotecnológica para o... more O uso de microrganismos está sendo aderido globalmente como uma alternativa biotecnológica para otimizar a produtividade vegetal de forma sustentável, atenuando o uso de produtos químicos e os impactos ambientais. Inoculantes microbianos, como as rizobactérias (Plant growth-promoting rizhobacteria - PGPR), micorrizas e fungos, combinados ou separados, podem ser inoculados em sementes, raízes, solo ou folhas. Microrganismos promotores do crescimento de plantas (Plant growth-promoting microbes - PGPM) atuam de forma direta como bioestimulantes e biofertilizantes; e de forma indireta como agentes de biocontrole. Essa biotecnologia microbiana é benéfica pois acelera o crescimento vegetal, incrementa a produtividade e a qualidade nutricional dos alimentos, além de aumentar a resistência das plantas contra estresses bióticos e abióticos. Portanto, considerando o potencial dos microrganismos como biopromotores de crescimento vegetal, conhecer sobre a interação desses com as plantas resulta...

RIZOBACTÉRIAS PARA A CONSERVAÇÃO DA Apuleia leiocarpa (Vogel) J.F.Macbr

Microbiologia básica e aplicada, 2022

Artemisia annua L. and Its Derivatives: Their Antiviral Effects on COVID-19 and Possible Mechanisms

Journal of Exploratory Research in Pharmacology, 2022

COVID-19 is a worldwide pandemic. Currently, there are a few approved effective antiviral drugs a... more COVID-19 is a worldwide pandemic. Currently, there are a few approved effective antiviral drugs against COV-ID-19. Therefore, an effective way to treat an emerging disease is to use existing medicines, which usually have a safety profile. A large number of compounds are produced from traditional medicinal plants and some of them that have antiviral activity could be used as therapeutics, such as Artemisia annua L. Here, we update the information on the therapeutic effects and possible antiviral mechanisms of A. annua and their derivatives against severe acute respiratory syndrome coronavirus (SARS-CoV-2) infection will be updated. The A. annua derivatives might be effective alternatives for COVID-19 treatment. A. annua might act against the SARS-CoV-2 infection by inhibiting its invasion, ACE2, CD147, and TMPRSS2 expression, virus replication, reducing oxidative stress and inflammation by attenuating Nrf2 and NF-kB signaling, and mitigating lung damage in patients with COVID-19. However, clinical effectiveness needs to be demonstrated.

Efeito da intensidade de luz no desenvolvimento vascular e na qualidade de mudas de Paricá

Scientia Plena, 2022

A luz é um fator ambiental essencial no crescimento de plantas. Por isso, este estudo objetiva an... more A luz é um fator ambiental essencial no crescimento de plantas. Por isso, este estudo objetiva analisar a influência da intensidade luminosa no desenvolvimento vascular e na qualidade de mudas de paricá (Schizolobium parahyba var. amazonicum Huber ex Ducke). As mudas foram alocadas sob pleno sol, baixa, média e alta intensidade de sombreamento (0%, 25%, 50% e 75% de sombreamento, respectivamente). Foram medidos o diâmetro, a altura, o índice SPAD, a produção de biomassa e o desenvolvimento vascular do caule (xilema, câmbio e floema). Calculou-se ainda o índice de qualidade de Dickson (IQD). Os maiores valores de produção de biomassa, desenvolvimento vascular e IQD foram encontrados nas mudas cultivadas sob baixa intensidade de sombreamento. Concluiu-se que a intensidade de luz influencia os parâmetros de crescimento em paricá, e que o desenvolvimento vascular do caule e os atributos morfológicos apresentam correlação direta, explicando o crescimento radial e o aumento da qualidade d...

Histórico e desafios da pecuária bovina na Amazônia

Challenges to cattle ranching in the Brazilian Amazon

Cattle ranching emerges as one of the main activities in the Brazilian Amazon. In the last decade... more Cattle ranching emerges as one of the main activities in the Brazilian Amazon. In the last decades, this activity expanded strongly in that region, a growth that should continue in the future. This manuscript summarizes the challenges and evolution of cattle ranching in the Brazilian Amazon, including their historical beginning. Emphasis is placed on the past 40 years of research experience accumulated by Embrapa on management and reclamation of degraded pasture areas in the Amazon. This document represents an important contribution by Embrapa in this strategic area for food security, environmental preservation and economic growth in the Amazon region. The expectation is that this paper might provide a new view on this oftenmisunderstood area of knowledge, influencing research investment decisions and public policies in the Brazilian Amazon.

CRESCIMENTO E ALOCAÇÃO DE CARBONO EM MUDAS DE Parkia gigantocarpa CULTIVADAS SOB SOMBREAMENTO

Pesquisa e Aplicação em Ciências Biológicas, 2021

Sob estresses abióticos, como sombreamento, as plantas apresentam plasticidade fenotípica, modifi... more Sob estresses abióticos, como sombreamento, as plantas apresentam plasticidade fenotípica, modificando seu desenvolvimento para sobreviverem a diferentes ambientes. Assim o objetivo desse estudo é verificar o efeito do sombreamento no crescimento e na alocação de carbono de mudas de Parkia gigantocarpa Ducke, também conhecida como faveira-atanã. As mudas foram alocadas sob pleno sol, baixa, média e alta intensidade de sombreamento (0%, 25%, 50% e 75% de sombreamento, respectivamente). Os parâmetros avaliados foram: altura, diâmetro, teor de clorofila, área foliar específica, produção de biomassa e alocação de carbono. O sombreamento alterou o crescimento de P. gigantocarpa. Como mecanismos de sua plasticidade fisiológica, essa espécie aumentou a clorofila e a área foliar específica, possibilitando sua adaptação a todos os níveis de sombreamento. O padrão de alocação do carbono não foi afetado pelos tratamentos. Ademais, considerando seu crescimento e produção de biomassa, essa espéc...

A Vitamina B12 Pode Ser Uma Alternativa No Tratamento De COVID-19?

Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está... more Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição 4.0 Internacional (CC BY 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. A Atena Editora não se responsabiliza por eventuais mudanças ocorridas nos endereços convencionais ou eletrônicos citados nesta obra. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação.

Successful Plant Growth-Promoting Microbes: Inoculation Methods and Abiotic Factors

Frontiers in Sustainable Food Systems, 2021

Plant-microbe interactions have been the subject of several biotechnological studies, seeking sus... more Plant-microbe interactions have been the subject of several biotechnological studies, seeking sustainable development and environmental conservation. The inoculation of plant growth-promoting microbes (PGPM) in agricultural crops is considered an environmental-friendly alternative to chemical fertilization. Microbial inoculants are mainly inoculated onto seeds, roots and soil. PGPM improve plant growth by enhancing the availability of nutrients, the regulation of phytohormones, and by increasing plant tolerance against biotic and abiotic stresses. One of the main obstacles with PGPM research are the inconsistent results, which may be the result of inoculation methods and abiotic factors, such as soil (nutrient or heavy metal contents and pH), water availability, light intensity and temperature. This review addresses how the PGPM inoculants act on plant growth, what mechanisms they use to survive under stressful environmental conditions, and how inoculation methods and abiotic factor...

Efficiency of Biostimulants for Alleviating Shade Effects on Forage Grass

Journal of Agricultural Studies, 2021

Shade is considered an abiotic stress factor which reduce the primary metabolism and restricts no... more Shade is considered an abiotic stress factor which reduce the primary metabolism and restricts normal growth in forage grass in integrated systems. Biostimulants are beneficial in promoting growth and protecting plants against environmental stresses. This is the first study that links biostimulants and the primary metabolism of plants grown under contrasting light intensities. We investigated how the use of biostimulants modifies the primary metabolism, reducing the deleterious effects of shading in the development of tropical forage grass Brachiaria brizantha cv. BRS Piatã. The association of Pseudomonas fluorescens and Burkholderia pyrrocinia, inoculated by soil drench, were used as biostimulants. We measured leaf anatomy, plant growth, and biochemical parameters. The use of biostimulants increased the shade tolerance on B. brizantha by modifying leaf structure, increasing the chlorophyll content, and inducing the production of osmoregulants, such as carbohydrates and proteins. In...

BIOPROMOTORES E LUZ NO CRESCIMENTO DE Brachiaria brizantha

Agronomia: Elo da Cadeia Produtiva 5, Dec 3, 2019

Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atrib... more Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição 4.0 Internacional (CC BY 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais.

Effect of <i>Pseudomonas fluorescens</i> and <i>Burkholderia pyrrocinia</i> on the Growth Improvement and Physiological Responses in <i>Brachiaria brizantha</i>

American Journal of Plant Sciences, 2018

The use of beneficial microorganisms in forage grasses is a potentially advantageous technique fo... more The use of beneficial microorganisms in forage grasses is a potentially advantageous technique for a more sustainable pasture management by decreasing the need for chemical fertilization. Our aims were to determine the best method of microorganism inoculation on Brachiaria (Syn. Urochloa) brizantha cv. BRS Piatã, compare the responses of inoculated plants of this forage grass with fertilized and unfertilized controls and examine its effect on some morphological, physiological and biochemical responses. On the first experiment, three inoculation methods were tested: in the seed, seed and soil, and soil, with Pseudomonas fluorescens (BRM-32111) and Burkholderia pyrrocinia (BRM-32113). In the second experiment, fertilized and unfertilized plants were either inoculated with BRM-32111, BRM-32113 and co-inoculated (BRM-32111 + BRM-32113). In a final experiment, B. brizantha was inoculated by soil drenching with BRM-32111, BRM-32113 and co-inoculated (BRM-32111 + BRM-32113), and compared to fertilized-and unfertilized-controls. The inoculation by soil drenching, at seedling stage, was more effective than inoculation only in the seed or both in the seed and by soil drenching. The fertilizer may have suppressed the beneficial bacterial effects on the growth of B. brizantha. P. fluorescens and B. pyrrocinia co-inoculated increased nitrate, protein, nitrogen concentration, Spad index (chlorophyll content), leaf area, number of tillers, net photosynthesis and total biomass production of B. brizantha plants. Our results point out to a potentially valuable source of practic-How to cite this paper: dos

Light and plant growth-promoting rhizobacteria effects onBrachiaria brizanthagrowth and phenotypic plasticity to shade

Grass and Forage Science, 2017

This is the first report on the effect of light intensity and plant growth-promoting rhizobacteri... more This is the first report on the effect of light intensity and plant growth-promoting rhizobacteria (PGPR) on the growth of a tropical forage grass, being a relevant study to improve pasture management in conventional farming and integrated crop-livestock-forestry systems. In this study, our aim was to evaluate the effects of light intensity and Burkholderia pyrrocinia and Pseudomonas fluorescens inoculation on Brachiaria brizantha cv. BRS Piatã growth, and phenotypic plasticity to shade. The experiment was conducted in a semi-controlled environment. Seedlings of B. brizantha were allocated to full sun and shade. P. fluorescens and B. pyrrocinia were inoculated individually or co-inoculated by soil drench, 14 days after seedling emergence. We evaluated morphogenesis, structural and growth parameters. Irrespective of the light regime, co-inoculated plants had greater leaf area and SPAD index (chlorophyll content). Increase in total biomass production in co-inoculated plants was over 100% and 300%, under full sun and shade respectively. Co-inoculated P. fluorescens and B. pyrrocinia increased shade tolerance in B. brizantha, improving plant performance. Co-inoculation promoted growth in B. brizantha under both sun and shade, indicating its potential as a bio-fertilizer in conventional and integrated systems, especially in silvopastoral systems, where light availability to pasture growth may be limited.

Triagem de forrageiras para tolerância ao excesso de água no solo

Neste texto serão apresentadas resumidamente as principais respostas das plantas ao excesso de ág... more Neste texto serão apresentadas resumidamente as principais respostas das plantas ao excesso de água no solo, assim como as características morfoanatômicas e fisiológicas de plantas, em geral, e de gramíneas forrageiras, em particular, associadas à tolerância a esse estresse. Com base nessas informações, serão discutidas algumas estratégias de triagem de forrageiras ao excesso de água no solo, visando subsidiar programas de lançamento de cultivares de forrageiras no Brasil.

Screening for tolerance to waterlogging in forage plants

Morphophysiological Behavior and Cambial Activity in Seedlings of Two Amazonian Tree Species under Shade

Journal of Botany, 2015

Variations in light intensity can lead to important anatomical and morphophysiological changes in... more Variations in light intensity can lead to important anatomical and morphophysiological changes in plants. Aiming to increase knowledge about the Amazonian tree species, this study examines the influence of shade on the cambial activity and development ofParkia gigantocarpaDucke andSchizolobium parahybavar.amazonicum(Huber ex Ducke) Barneby seedlings. Seedlings of the two species were grown in a nursery under four shade intensities (treatments): full sun, low, moderate, and high shade (resp., 0%, 23%, 67%, and 73% of shade, or 2000, 1540, 660, and 540 µmol·m−2·s−1) obtained with polyethylene screens. We measured plant height, stem diameter, biomass production, stomatal conductance (gs), transpiration (E), photosynthesis (A), and cambial activity (CA) (xylem, cambium, and phloem). Also, we calculated the Dickson Quality Index (DQI). The highest values of biomass production,gs, E, A, and DQI, were found under full sun, inP. gigantocarpa, and under low shade intensity inS. parahyba. In...

Carbon compounds and chlorophyll contents in sorghum submitted to water deficit during three growth stages

International Journal of …, 2009

... Silva Lobato, MC Goncalves-Vidigal, RCL da Costa, BG dos Santos Filho, GAR Alves, WJ de Mello... more

Biotecnologia microbiana: inoculação, mecanismos de ação e benefícios às plantas

Research, Society and Development, 2021

O uso de microrganismos está sendo aderido globalmente como uma alternativa biotecnológica para o... more O uso de microrganismos está sendo aderido globalmente como uma alternativa biotecnológica para otimizar a produtividade vegetal de forma sustentável, atenuando o uso de produtos químicos e os impactos ambientais. Inoculantes microbianos, como as rizobactérias (Plant growth-promoting rizhobacteria - PGPR), micorrizas e fungos, combinados ou separados, podem ser inoculados em sementes, raízes, solo ou folhas. Microrganismos promotores do crescimento de plantas (Plant growth-promoting microbes - PGPM) atuam de forma direta como bioestimulantes e biofertilizantes; e de forma indireta como agentes de biocontrole. Essa biotecnologia microbiana é benéfica pois acelera o crescimento vegetal, incrementa a produtividade e a qualidade nutricional dos alimentos, além de aumentar a resistência das plantas contra estresses bióticos e abióticos. Portanto, considerando o potencial dos microrganismos como biopromotores de crescimento vegetal, conhecer sobre a interação desses com as plantas resulta...