Physiological and yield parameters of wheat as affected by tiller removal and defoliation

Detalhes bibliográficos
Autor(a) principal: Fioreze, Samuel Luiz
Data de Publicação: 2023
Outros Autores: Borga, Iury, Ribeiro, Elisandra Cristina
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/27412
Resumo: The objective of this work was to evaluate the photosynthetic parameters, yield potential, and response to defoliation of wheat (Triticum aestivum) plants subjected to tiller removal. Two experiments were conducted under greenhouse conditions. In the first, the two following cultivars were evaluated for complete tiller removal: TBIO Audaz and BRS 394, with a high and low tillering capacity, respectively. In the second, only 'TBIO Audaz' was subjected to detillering and defoliation at post-anthesis. Tiller removal increased the yield potential of the main stem of both tested cultivars and the CO2 assimilation potential of the flag leaf, which was possibly a strategy to meet the demands for an increased sink strength, as evidenced by the response curves to irradiance and leaf internal CO2 concentration. The partial defoliation of 'TBIO Audaz' increased daily CO2 assimilation, both in intact and detillered plants. Detillered plants show a higher photosynthetic and yield potential of the main stem, but also a greater sensitivity to defoliation in the post-anthesis period.
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spelling Physiological and yield parameters of wheat as affected by tiller removal and defoliationParâmetros fisiológicos e produtivos de trigo afetados pela remoção de perfilhos e pela desfolhaTriticum aestivum; photosynthesis; source-sink relationship; tilleringTriticum aestivum; fotossíntese; relação fonte-dreno;, perfilhamentoThe objective of this work was to evaluate the photosynthetic parameters, yield potential, and response to defoliation of wheat (Triticum aestivum) plants subjected to tiller removal. Two experiments were conducted under greenhouse conditions. In the first, the two following cultivars were evaluated for complete tiller removal: TBIO Audaz and BRS 394, with a high and low tillering capacity, respectively. In the second, only 'TBIO Audaz' was subjected to detillering and defoliation at post-anthesis. Tiller removal increased the yield potential of the main stem of both tested cultivars and the CO2 assimilation potential of the flag leaf, which was possibly a strategy to meet the demands for an increased sink strength, as evidenced by the response curves to irradiance and leaf internal CO2 concentration. The partial defoliation of 'TBIO Audaz' increased daily CO2 assimilation, both in intact and detillered plants. Detillered plants show a higher photosynthetic and yield potential of the main stem, but also a greater sensitivity to defoliation in the post-anthesis period.O objetivo deste trabalho foi avaliar os parâmetros fotossintéticos, o potencial produtivo e as respostas à desfolha de plantas de trigo (Triticum aestivum) submetidas à remoção de perfilhos. Dois experimentos foram conduzidos em cultivo protegido. No primeiro, as duas seguintes cultivares foram avaliadas quanto à remoção total de perfilhos: TBIO Audaz e BRS 394, com alto e baixo potencial de perfilhamento, respectivamente. No segundo, apenas 'TBIO Audaz' foi submetida à remoção de perfilhos e à desfolha no período de pós-antese. A remoção dos perfilhos aumentou o potencial produtivo do colmo principal das duas cultivares testadas e a assimilação de CO2 da folha bandeira, que, possivelmente, foi uma estratégia para suprir a maior demanda de drenos, como evidenciado pelas curvas de resposta à irradiância e à concentração foliar interna de CO2. A desfolha parcial de 'TBIO Audaz' aumentou a assimilação diária de CO2, tanto em plantas intactas quanto nas com perfilhos removidos. As plantas submetidas à remoção de perfilhos apresentam maior potencial fotossintético e produtivo do colmo principal, mas, também, maior sensibilidade à desfolha no período de pós-antese.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraFioreze, Samuel LuizBorga, IuryRibeiro, Elisandra Cristina2023-08-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/27412Pesquisa Agropecuaria Brasileira; V.58, Jan./Dec., 2023: Publicação contínua em volume anual; e03156Pesquisa Agropecuária Brasileira; V.58, Jan./Dec., 2023: Publicação contínua em volume anual; e031561678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/27412/15185Direitos autorais 2023 Pesquisa Agropecuária Brasileirainfo:eu-repo/semantics/openAccess2023-12-14T19:04:54Zoai:ojs.seer.sct.embrapa.br:article/27412Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2023-12-14T19:04:54Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Physiological and yield parameters of wheat as affected by tiller removal and defoliation
Parâmetros fisiológicos e produtivos de trigo afetados pela remoção de perfilhos e pela desfolha
title Physiological and yield parameters of wheat as affected by tiller removal and defoliation
spellingShingle Physiological and yield parameters of wheat as affected by tiller removal and defoliation
Fioreze, Samuel Luiz
Triticum aestivum; photosynthesis; source-sink relationship; tillering
Triticum aestivum; fotossíntese; relação fonte-dreno;, perfilhamento
title_short Physiological and yield parameters of wheat as affected by tiller removal and defoliation
title_full Physiological and yield parameters of wheat as affected by tiller removal and defoliation
title_fullStr Physiological and yield parameters of wheat as affected by tiller removal and defoliation
title_full_unstemmed Physiological and yield parameters of wheat as affected by tiller removal and defoliation
title_sort Physiological and yield parameters of wheat as affected by tiller removal and defoliation
author Fioreze, Samuel Luiz
author_facet Fioreze, Samuel Luiz
Borga, Iury
Ribeiro, Elisandra Cristina
author_role author
author2 Borga, Iury
Ribeiro, Elisandra Cristina
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Fioreze, Samuel Luiz
Borga, Iury
Ribeiro, Elisandra Cristina
dc.subject.por.fl_str_mv Triticum aestivum; photosynthesis; source-sink relationship; tillering
Triticum aestivum; fotossíntese; relação fonte-dreno;, perfilhamento
topic Triticum aestivum; photosynthesis; source-sink relationship; tillering
Triticum aestivum; fotossíntese; relação fonte-dreno;, perfilhamento
description The objective of this work was to evaluate the photosynthetic parameters, yield potential, and response to defoliation of wheat (Triticum aestivum) plants subjected to tiller removal. Two experiments were conducted under greenhouse conditions. In the first, the two following cultivars were evaluated for complete tiller removal: TBIO Audaz and BRS 394, with a high and low tillering capacity, respectively. In the second, only 'TBIO Audaz' was subjected to detillering and defoliation at post-anthesis. Tiller removal increased the yield potential of the main stem of both tested cultivars and the CO2 assimilation potential of the flag leaf, which was possibly a strategy to meet the demands for an increased sink strength, as evidenced by the response curves to irradiance and leaf internal CO2 concentration. The partial defoliation of 'TBIO Audaz' increased daily CO2 assimilation, both in intact and detillered plants. Detillered plants show a higher photosynthetic and yield potential of the main stem, but also a greater sensitivity to defoliation in the post-anthesis period.
publishDate 2023
dc.date.none.fl_str_mv 2023-08-28
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/27412
url https://seer.sct.embrapa.br/index.php/pab/article/view/27412
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/27412/15185
dc.rights.driver.fl_str_mv Direitos autorais 2023 Pesquisa Agropecuária Brasileira
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Direitos autorais 2023 Pesquisa Agropecuária Brasileira
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; V.58, Jan./Dec., 2023: Publicação contínua em volume anual; e03156
Pesquisa Agropecuária Brasileira; V.58, Jan./Dec., 2023: Publicação contínua em volume anual; e03156
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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