|
|
Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo; Embrapa Pecuária Sudeste. |
Data corrente: |
03/05/2024 |
Data da última atualização: |
10/05/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
FERREIRA, J. P.; MARQUES, D. M.; KARAM, D.; BORGHI, E.; MAGALHAES, P. C.; SOUZA, K. R. D. de; ARANTES, S. D.; SOUZA, T. C. de. |
Afiliação: |
JANAÍNA PIZA FERREIRA, UNIVERSIDADE FEDERAL DE ALFENAS; DANIELE MARIA MARQUES, UNIVERSIDADE FEDERAL DE ALFENAS; DECIO KARAM, CNPMS; EMERSON BORGHI, CPPSE; PAULO CESAR MAGALHAES, CNPMS; KAMILA REZENDE DÁZIO DE SOUZA, UNIVERSIDADE FEDERAL DE ALFENAS; SARA DOUSSEAU ARANTES, INSTITUTO CAPIXABA DE PESQUISA; THIAGO CORRÊA DE SOUZA, UNIVERSIDADE FEDERAL DE ALFENAS. |
Título: |
How does early defoliation influence the morphophysiology and biochemical characteristics of maize? |
Ano de publicação: |
2024 |
Fonte/Imprenta: |
Plant Growth Regulation, 2024. |
DOI: |
https://doi.org/10.1007/s10725-024-01145-x |
Idioma: |
Inglês |
Notas: |
First online. |
Conteúdo: |
Defoliation is a type of mechanical stress, and few studies have investigated this process in the early stages of maize development. Pest attacks, hail and machinery traffic have increased in recent decades, thus increasing this stress and potentially leading to losses. Furthermore, there are corn production systems in Brazil where early defoliation naturally occurs. Thus, the objective of this study was to determine the morphophysiological and biochemical changes in maize subjected to early defoliation and their effects on recovery from this stress. The experiment was performed in pots, and the plants were subjected to two treatments at the four fully expanded leaf stage: without defoliation (control) and with defoliation. Morphometric parameters, such as gas exchange, leaf pigment and biomolecule content, phytohormone con- tent, root morphology and leaf anatomy, were evaluated at seven and fourteen days after defoliation. Compared with the control plants, the defoliated corn plants were shorter in height, stem diameter, length, surface area, root diameter and volume, dry biomass and leaf anatomy. However, photosynthesis, chlorophyll content and nutrient content were similar in both treatments. After seven days of treatment, the amino acid content increased in the defoliated plants, and after fourteen days, the reducing sugars, amino acids and proteins decreased in these plants. The levels of gibberellins and salicylic acid were greater in plants subjected to defoliation. The reestablishment of corn plants after defoliation occurred through the action of gibberellins and salicylic acid, which promoted the growth of aboveground biomass, maintenance of chlorophylls and gas exchange. The reallocation of amino acids and reducing sugars also contributes to the formation of new leaf primordia in defoliated plants. MenosDefoliation is a type of mechanical stress, and few studies have investigated this process in the early stages of maize development. Pest attacks, hail and machinery traffic have increased in recent decades, thus increasing this stress and potentially leading to losses. Furthermore, there are corn production systems in Brazil where early defoliation naturally occurs. Thus, the objective of this study was to determine the morphophysiological and biochemical changes in maize subjected to early defoliation and their effects on recovery from this stress. The experiment was performed in pots, and the plants were subjected to two treatments at the four fully expanded leaf stage: without defoliation (control) and with defoliation. Morphometric parameters, such as gas exchange, leaf pigment and biomolecule content, phytohormone con- tent, root morphology and leaf anatomy, were evaluated at seven and fourteen days after defoliation. Compared with the control plants, the defoliated corn plants were shorter in height, stem diameter, length, surface area, root diameter and volume, dry biomass and leaf anatomy. However, photosynthesis, chlorophyll content and nutrient content were similar in both treatments. After seven days of treatment, the amino acid content increased in the defoliated plants, and after fourteen days, the reducing sugars, amino acids and proteins decreased in these plants. The levels of gibberellins and salicylic acid were greater in plants subjected to defoliation. T... Mostrar Tudo |
Palavras-Chave: |
Anatomia foliar; Fitohormônio. |
Thesagro: |
Açúcar; Desfolha; Fotossíntese; Milho; Zea Mays. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1164068/1/How-does-early-defoliation-influence-the-morphophysiology.pdf
|
Marc: |
LEADER 02716naa a2200313 a 4500 001 2164068 005 2024-05-10 008 2024 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1007/s10725-024-01145-x$2DOI 100 1 $aFERREIRA, J. P. 245 $aHow does early defoliation influence the morphophysiology and biochemical characteristics of maize?$h[electronic resource] 260 $c2024 500 $aFirst online. 520 $aDefoliation is a type of mechanical stress, and few studies have investigated this process in the early stages of maize development. Pest attacks, hail and machinery traffic have increased in recent decades, thus increasing this stress and potentially leading to losses. Furthermore, there are corn production systems in Brazil where early defoliation naturally occurs. Thus, the objective of this study was to determine the morphophysiological and biochemical changes in maize subjected to early defoliation and their effects on recovery from this stress. The experiment was performed in pots, and the plants were subjected to two treatments at the four fully expanded leaf stage: without defoliation (control) and with defoliation. Morphometric parameters, such as gas exchange, leaf pigment and biomolecule content, phytohormone con- tent, root morphology and leaf anatomy, were evaluated at seven and fourteen days after defoliation. Compared with the control plants, the defoliated corn plants were shorter in height, stem diameter, length, surface area, root diameter and volume, dry biomass and leaf anatomy. However, photosynthesis, chlorophyll content and nutrient content were similar in both treatments. After seven days of treatment, the amino acid content increased in the defoliated plants, and after fourteen days, the reducing sugars, amino acids and proteins decreased in these plants. The levels of gibberellins and salicylic acid were greater in plants subjected to defoliation. The reestablishment of corn plants after defoliation occurred through the action of gibberellins and salicylic acid, which promoted the growth of aboveground biomass, maintenance of chlorophylls and gas exchange. The reallocation of amino acids and reducing sugars also contributes to the formation of new leaf primordia in defoliated plants. 650 $aAçúcar 650 $aDesfolha 650 $aFotossíntese 650 $aMilho 650 $aZea Mays 653 $aAnatomia foliar 653 $aFitohormônio 700 1 $aMARQUES, D. M. 700 1 $aKARAM, D. 700 1 $aBORGHI, E. 700 1 $aMAGALHAES, P. C. 700 1 $aSOUZA, K. R. D. de 700 1 $aARANTES, S. D. 700 1 $aSOUZA, T. C. de 773 $tPlant Growth Regulation, 2024.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
Registro Completo
Biblioteca(s): |
Embrapa Amazônia Ocidental. |
Data corrente: |
10/04/2001 |
Data da última atualização: |
23/12/2014 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
WELCH, S. A.; RIHA, S. H.; FERNANDES, E. C. M.; WANDELLI, E. V.; RONDON, M. A. |
Afiliação: |
Cornell University; Embrapa Amazonia Ocidental. |
Título: |
Captura de recursos de agua e luz por sistemas agroflorestais implantados em areas de pastagens degradadas da Amazonia Ocidental. |
Ano de publicação: |
2000 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 3., 2000, Manaus. Sistemas agroflorestais: manejando a biodiversidade e compondo a paisagem rural - resumos expandidos. Manaus: Embrapa Amazonia Ocidental, 2000. |
Páginas: |
p. 68-70. |
Idioma: |
Português |
Conteúdo: |
Avaliacao da captura de recursos de agua e luz por sistemas agroflorestais (SAFs), por meio de monitoramente intensivo durante dois anos, em areas degradadas de terra firme no Distrito Agropecuario da SUFRAMA, Manaus-AM (Brasil). Foi verificado que floresta e pastagem represetam os extremos dos indices de area foliar (IAF). As capoeiras e as areas dos SAFs podem apresentar um IAF mais proximo ao da floresta, mas sao mais suscetiveis as mudancas do que aquelas. A hipotese e' de que essa variacao na area foliar e captura de luz tem relacao com a agua do solo. Sistemas radiculares profundos podem permitir a manutencao de uma maior area foliar durante a seca, que pode fornecer maior superficie evaporativa, para que as raizes bombeiem mais agua e capturem mais nutrientes do solo. |
Palavras-Chave: |
Agrofloresta; Amazonas; Brasil; Fallows; Manaus; Pasture; Plant water relations; Transpiracao. |
Thesagro: |
Água do Solo; Capoeira; Floresta Tropical Úmida; Pastagem; Radiação Solar; Relação Água-Planta. |
Thesaurus NAL: |
agroforestry; soil water; solar radiation; transpiration; tropical rain forests. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/114381/1/CPAA-DOC.-7-79.pdf
|
Marc: |
LEADER 02045nam a2200397 a 4500 001 1670593 005 2014-12-23 008 2000 bl uuuu u00u1 u #d 100 1 $aWELCH, S. A. 245 $aCaptura de recursos de agua e luz por sistemas agroflorestais implantados em areas de pastagens degradadas da Amazonia Ocidental. 260 $aIn: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 3., 2000, Manaus. Sistemas agroflorestais: manejando a biodiversidade e compondo a paisagem rural - resumos expandidos. Manaus: Embrapa Amazonia Ocidental$c2000 300 $ap. 68-70. 520 $aAvaliacao da captura de recursos de agua e luz por sistemas agroflorestais (SAFs), por meio de monitoramente intensivo durante dois anos, em areas degradadas de terra firme no Distrito Agropecuario da SUFRAMA, Manaus-AM (Brasil). Foi verificado que floresta e pastagem represetam os extremos dos indices de area foliar (IAF). As capoeiras e as areas dos SAFs podem apresentar um IAF mais proximo ao da floresta, mas sao mais suscetiveis as mudancas do que aquelas. A hipotese e' de que essa variacao na area foliar e captura de luz tem relacao com a agua do solo. Sistemas radiculares profundos podem permitir a manutencao de uma maior area foliar durante a seca, que pode fornecer maior superficie evaporativa, para que as raizes bombeiem mais agua e capturem mais nutrientes do solo. 650 $aagroforestry 650 $asoil water 650 $asolar radiation 650 $atranspiration 650 $atropical rain forests 650 $aÁgua do Solo 650 $aCapoeira 650 $aFloresta Tropical Úmida 650 $aPastagem 650 $aRadiação Solar 650 $aRelação Água-Planta 653 $aAgrofloresta 653 $aAmazonas 653 $aBrasil 653 $aFallows 653 $aManaus 653 $aPasture 653 $aPlant water relations 653 $aTranspiracao 700 1 $aRIHA, S. H. 700 1 $aFERNANDES, E. C. M. 700 1 $aWANDELLI, E. V. 700 1 $aRONDON, M. A.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Amazônia Ocidental (CPAA) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Expressão de busca inválida. Verifique!!! |
|
|