How does early defoliation influence the morphophysiology and biochemical characteristics of maize?

Detalhes bibliográficos
Autor(a) principal: FERREIRA, J. P.
Data de Publicação: 2024
Outros Autores: MARQUES, D. M., KARAM, D., BORGHI, E., MAGALHAES, P. C., SOUZA, K. R. D. de, ARANTES, S. D., SOUZA, T. C. de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1164068
https://doi.org/10.1007/s10725-024-01145-x
Resumo: 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.
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spelling How does early defoliation influence the morphophysiology and biochemical characteristics of maize?FitohormônioAnatomia foliarMilhoZea MaysAçúcarFotossínteseDesfolhaDefoliation 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.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.FERREIRA, J. P.MARQUES, D. M.KARAM, D.BORGHI, E.MAGALHAES, P. C.SOUZA, K. R. D. deARANTES, S. D.SOUZA, T. C. de2024-07-11T13:55:32Z2024-07-11T13:55:32Z2024-05-032024info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlePlant Growth Regulation, v. 103, p. 747-761, 2024.http://www.alice.cnptia.embrapa.br/alice/handle/doc/1164068https://doi.org/10.1007/s10725-024-01145-xenginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2024-07-11T13:55:32Zoai:www.alice.cnptia.embrapa.br:doc/1164068Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542024-07-11T13:55:32Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv How does early defoliation influence the morphophysiology and biochemical characteristics of maize?
title How does early defoliation influence the morphophysiology and biochemical characteristics of maize?
spellingShingle How does early defoliation influence the morphophysiology and biochemical characteristics of maize?
FERREIRA, J. P.
Fitohormônio
Anatomia foliar
Milho
Zea Mays
Açúcar
Fotossíntese
Desfolha
title_short How does early defoliation influence the morphophysiology and biochemical characteristics of maize?
title_full How does early defoliation influence the morphophysiology and biochemical characteristics of maize?
title_fullStr How does early defoliation influence the morphophysiology and biochemical characteristics of maize?
title_full_unstemmed How does early defoliation influence the morphophysiology and biochemical characteristics of maize?
title_sort How does early defoliation influence the morphophysiology and biochemical characteristics of maize?
author FERREIRA, J. P.
author_facet 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
author_role author
author2 MARQUES, D. M.
KARAM, D.
BORGHI, E.
MAGALHAES, P. C.
SOUZA, K. R. D. de
ARANTES, S. D.
SOUZA, T. C. de
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv 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.
dc.contributor.author.fl_str_mv 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
dc.subject.por.fl_str_mv Fitohormônio
Anatomia foliar
Milho
Zea Mays
Açúcar
Fotossíntese
Desfolha
topic Fitohormônio
Anatomia foliar
Milho
Zea Mays
Açúcar
Fotossíntese
Desfolha
description 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.
publishDate 2024
dc.date.none.fl_str_mv 2024-07-11T13:55:32Z
2024-07-11T13:55:32Z
2024-05-03
2024
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Plant Growth Regulation, v. 103, p. 747-761, 2024.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1164068
https://doi.org/10.1007/s10725-024-01145-x
identifier_str_mv Plant Growth Regulation, v. 103, p. 747-761, 2024.
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/1164068
https://doi.org/10.1007/s10725-024-01145-x
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv cg-riaa@embrapa.br
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