Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition.
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
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/1105591 |
Resumo: | Root cortical aerenchyma (RCA) is suggested to reduce metabolic cost for root growth, but it might lower water uptake by plants. The objective of this work was to evaluate the effects of drought and phosphorus on the RCA development along the root axis and to elucidate its role in water stress tolerance of two maize genotypes. Plants of drought-tolerant DKB390 and drought-sensitive BRS1010 genotypes were grown in Vermiculite at field capacity of 100, 75, 50, and 25 % and supplied with 0.1, 0.4, and 0.8 mM phosphorus. Growth parameters, RCA, and plant P content were evaluated for all plants. Higher RCA development was observed in DKB390 than in BRS1010. Drought reduced the percentage of RCA in the root-hair zone of both genotypes but increased its development in the root maturation zone. Phosphorus limitation enhanced RCA development only in the DKB390. Under drought stress, DKB390 showed resilient growth whereas growth was inhibited in BRS1010. Higher root P content was related to its higher supply. Therefore, RCA formation was induced either by drought or by phosphorus limitation, while no interaction was evident. The RCA development varied along the root axis in order to balance water and phosphorus uptake and the drought response was genotype dependent. |
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Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition.BiomassaResistência a SecaTaxa de CrescimentoRaizMilhoRoot cortical aerenchyma (RCA) is suggested to reduce metabolic cost for root growth, but it might lower water uptake by plants. The objective of this work was to evaluate the effects of drought and phosphorus on the RCA development along the root axis and to elucidate its role in water stress tolerance of two maize genotypes. Plants of drought-tolerant DKB390 and drought-sensitive BRS1010 genotypes were grown in Vermiculite at field capacity of 100, 75, 50, and 25 % and supplied with 0.1, 0.4, and 0.8 mM phosphorus. Growth parameters, RCA, and plant P content were evaluated for all plants. Higher RCA development was observed in DKB390 than in BRS1010. Drought reduced the percentage of RCA in the root-hair zone of both genotypes but increased its development in the root maturation zone. Phosphorus limitation enhanced RCA development only in the DKB390. Under drought stress, DKB390 showed resilient growth whereas growth was inhibited in BRS1010. Higher root P content was related to its higher supply. Therefore, RCA formation was induced either by drought or by phosphorus limitation, while no interaction was evident. The RCA development varied along the root axis in order to balance water and phosphorus uptake and the drought response was genotype dependent.Universidade Federal de Lavras; Universidade Federal de Lavras; Universidade Federal de Lavras; Universidade Federal de Lavras; PAULO CESAR MAGALHAES, CNPMS; Universidade Federal de Alfenas.DÍAZ, A. S.AGUIAR, G. M.PEREIRA, M. P.CASTRO, E. M. deMAGALHAES, P. C.PEREIRA, F. J.2019-02-06T23:39:45Z2019-02-06T23:39:45Z2019-02-0620182019-02-07T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleBiologia Plantarum, v. 62, n. 3, p. 561-568, 2018.http://www.alice.cnptia.embrapa.br/alice/handle/doc/110559110.1007/s10535-018-0773-8enginfo: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:EMBRAPA2019-02-06T23:39:52Zoai:www.alice.cnptia.embrapa.br:doc/1105591Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542019-02-06T23:39:52falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542019-02-06T23:39:52Repositório 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 |
Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition. |
title |
Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition. |
spellingShingle |
Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition. DÍAZ, A. S. Biomassa Resistência a Seca Taxa de Crescimento Raiz Milho |
title_short |
Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition. |
title_full |
Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition. |
title_fullStr |
Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition. |
title_full_unstemmed |
Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition. |
title_sort |
Aerenchyma development in different root zones of maize genotypes under water limitation and different phosphorus nutrition. |
author |
DÍAZ, A. S. |
author_facet |
DÍAZ, A. S. AGUIAR, G. M. PEREIRA, M. P. CASTRO, E. M. de MAGALHAES, P. C. PEREIRA, F. J. |
author_role |
author |
author2 |
AGUIAR, G. M. PEREIRA, M. P. CASTRO, E. M. de MAGALHAES, P. C. PEREIRA, F. J. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Lavras; Universidade Federal de Lavras; Universidade Federal de Lavras; Universidade Federal de Lavras; PAULO CESAR MAGALHAES, CNPMS; Universidade Federal de Alfenas. |
dc.contributor.author.fl_str_mv |
DÍAZ, A. S. AGUIAR, G. M. PEREIRA, M. P. CASTRO, E. M. de MAGALHAES, P. C. PEREIRA, F. J. |
dc.subject.por.fl_str_mv |
Biomassa Resistência a Seca Taxa de Crescimento Raiz Milho |
topic |
Biomassa Resistência a Seca Taxa de Crescimento Raiz Milho |
description |
Root cortical aerenchyma (RCA) is suggested to reduce metabolic cost for root growth, but it might lower water uptake by plants. The objective of this work was to evaluate the effects of drought and phosphorus on the RCA development along the root axis and to elucidate its role in water stress tolerance of two maize genotypes. Plants of drought-tolerant DKB390 and drought-sensitive BRS1010 genotypes were grown in Vermiculite at field capacity of 100, 75, 50, and 25 % and supplied with 0.1, 0.4, and 0.8 mM phosphorus. Growth parameters, RCA, and plant P content were evaluated for all plants. Higher RCA development was observed in DKB390 than in BRS1010. Drought reduced the percentage of RCA in the root-hair zone of both genotypes but increased its development in the root maturation zone. Phosphorus limitation enhanced RCA development only in the DKB390. Under drought stress, DKB390 showed resilient growth whereas growth was inhibited in BRS1010. Higher root P content was related to its higher supply. Therefore, RCA formation was induced either by drought or by phosphorus limitation, while no interaction was evident. The RCA development varied along the root axis in order to balance water and phosphorus uptake and the drought response was genotype dependent. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018 2019-02-06T23:39:45Z 2019-02-06T23:39:45Z 2019-02-06 2019-02-07T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Biologia Plantarum, v. 62, n. 3, p. 561-568, 2018. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1105591 10.1007/s10535-018-0773-8 |
identifier_str_mv |
Biologia Plantarum, v. 62, n. 3, p. 561-568, 2018. 10.1007/s10535-018-0773-8 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1105591 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) 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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1794503470965850112 |