Low night temperature and water deficit on photosynthesis of sugarcane

Low night temperature and water deficit on photosynthesis of sugarcane

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The objective of this work was to evaluate the photosynthetic responses of sugarcane to the simultaneous and isolated effects of low night temperature (TN) and water deficit (DH). After 128 days of planting, plants of the cultivar IACSP94-2094 were subjected to the following treatments: control, without DH and with TN of 20°C (TN20); with DH and TN of 20°C (DH/TN20); without DH and with TN of 12°C (TN12); and with DH and TN of 12°C (DH/TN12). After the period of treatment, plants were irrigated and subjected to TN of 20°C for four more days, for recovery. There were decreases in CO2 assimilation in all treatments. Total recovery of CO2 assimilation was observed only in plants from the treatment TN12. The simultaneous occurrence of low night temperature and water deficit caused a accentuated and persistent effect on stomatal conductance, on the maximum capacity of ribulose‑1,5‑bisphosphate carboxylase, on the electron transport rate, on the efficiency factor, and on the operational efficiency of photosystem II, which resulted in diffusive, biochemical, and photochemical limitations of photosynthesis of sugarcane plants.

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Main Authors: Machado, Daniela Favero São Pedro, Lagôa, Ana Maria Magalhães Andrade, Ribeiro, Rafael Vasconcelos, Marchiori, Paulo Eduardo Ribeiro, Machado, Ricardo Silvério, Machado, Eduardo Caruso
Format: Digital revista
Language:por
Published: Pesquisa Agropecuaria Brasileira 2013
Online Access:https://seer.sct.embrapa.br/index.php/pab/article/view/14406
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spelling rev-pab-br-article-144062013-07-31T20:58:44Z Low night temperature and water deficit on photosynthesis of sugarcane Baixa temperatura noturna e deficiência hídrica na fotossíntese de cana‑de‑açúcar Machado, Daniela Favero São Pedro Lagôa, Ana Maria Magalhães Andrade Ribeiro, Rafael Vasconcelos Marchiori, Paulo Eduardo Ribeiro Machado, Ricardo Silvério Machado, Eduardo Caruso Saccharum; CO2 assimilation; PEPcase; cooling; Rubisco Saccharum; assimilação de CO2; PEPcase; resfriamento; Rubisco The objective of this work was to evaluate the photosynthetic responses of sugarcane to the simultaneous and isolated effects of low night temperature (TN) and water deficit (DH). After 128 days of planting, plants of the cultivar IACSP94-2094 were subjected to the following treatments: control, without DH and with TN of 20°C (TN20); with DH and TN of 20°C (DH/TN20); without DH and with TN of 12°C (TN12); and with DH and TN of 12°C (DH/TN12). After the period of treatment, plants were irrigated and subjected to TN of 20°C for four more days, for recovery. There were decreases in CO2 assimilation in all treatments. Total recovery of CO2 assimilation was observed only in plants from the treatment TN12. The simultaneous occurrence of low night temperature and water deficit caused a accentuated and persistent effect on stomatal conductance, on the maximum capacity of ribulose‑1,5‑bisphosphate carboxylase, on the electron transport rate, on the efficiency factor, and on the operational efficiency of photosystem II, which resulted in diffusive, biochemical, and photochemical limitations of photosynthesis of sugarcane plants. O objetivo deste trabalho foi avaliar as respostas fotossintéticas da cana‑de‑açúcar aos efeitos simultâneos e isolados de baixa temperatura noturna (TN) e deficiência hídrica (DH). Após 128 dias do plantio, as plantas da cultivar IACSP94-2094 foram submetidas aos tratamentos: controle, sem DH e com TN de 20°C (TN20); com DH e TN de 20°C (DH/TN20); sem DH e com TN de 12°C (TN12); e com DH e TN de 12°C (DH/TN12) por cinco dias. Após o período de tratamento, as plantas foram irrigadas e submetidas à TN de 20°C por mais quatro dias, para recuperação. Houve decréscimos na assimilação de CO2 em todos os tratamentos. A recuperação total da assimilação de CO2 foi observada apenas nas plantas do tratamento TN12. A ocorrência simultânea da baixa temperatura noturna e da deficiência hídrica causou dano acentuado e persistente na condutância estomática, na capacidade máxima da ribulose‑1,5‑bisfosfato carboxilase, no transporte aparente de elétrons, no fator de eficiência e na eficiência operacional do fotossistema II, o que resultou em limitações difusivas, bioquímicas e fotoquímicas da fotossíntese das plantas de cana‑de‑açúcar. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira Fundação de Amparo a Pesquisa do Estado de São Paulo, Fapesp. 2013-07-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/14406 Pesquisa Agropecuaria Brasileira; v.48, n.5, maio 2013; 487-495 Pesquisa Agropecuária Brasileira; v.48, n.5, maio 2013; 487-495 1678-3921 0100-104x por https://seer.sct.embrapa.br/index.php/pab/article/view/14406/11772 https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/14406/9645
institution EMBRAPA
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-pab-br
tag revista
region America del Sur
libraryname Sistema de bibliotecas de EMBRAPA
language por
format Digital
author Machado, Daniela Favero São Pedro
Lagôa, Ana Maria Magalhães Andrade
Ribeiro, Rafael Vasconcelos
Marchiori, Paulo Eduardo Ribeiro
Machado, Ricardo Silvério
Machado, Eduardo Caruso
spellingShingle Machado, Daniela Favero São Pedro
Lagôa, Ana Maria Magalhães Andrade
Ribeiro, Rafael Vasconcelos
Marchiori, Paulo Eduardo Ribeiro
Machado, Ricardo Silvério
Machado, Eduardo Caruso
Low night temperature and water deficit on photosynthesis of sugarcane
author_facet Machado, Daniela Favero São Pedro
Lagôa, Ana Maria Magalhães Andrade
Ribeiro, Rafael Vasconcelos
Marchiori, Paulo Eduardo Ribeiro
Machado, Ricardo Silvério
Machado, Eduardo Caruso
author_sort Machado, Daniela Favero São Pedro
title Low night temperature and water deficit on photosynthesis of sugarcane
title_short Low night temperature and water deficit on photosynthesis of sugarcane
title_full Low night temperature and water deficit on photosynthesis of sugarcane
title_fullStr Low night temperature and water deficit on photosynthesis of sugarcane
title_full_unstemmed Low night temperature and water deficit on photosynthesis of sugarcane
title_sort low night temperature and water deficit on photosynthesis of sugarcane
description The objective of this work was to evaluate the photosynthetic responses of sugarcane to the simultaneous and isolated effects of low night temperature (TN) and water deficit (DH). After 128 days of planting, plants of the cultivar IACSP94-2094 were subjected to the following treatments: control, without DH and with TN of 20°C (TN20); with DH and TN of 20°C (DH/TN20); without DH and with TN of 12°C (TN12); and with DH and TN of 12°C (DH/TN12). After the period of treatment, plants were irrigated and subjected to TN of 20°C for four more days, for recovery. There were decreases in CO2 assimilation in all treatments. Total recovery of CO2 assimilation was observed only in plants from the treatment TN12. The simultaneous occurrence of low night temperature and water deficit caused a accentuated and persistent effect on stomatal conductance, on the maximum capacity of ribulose‑1,5‑bisphosphate carboxylase, on the electron transport rate, on the efficiency factor, and on the operational efficiency of photosystem II, which resulted in diffusive, biochemical, and photochemical limitations of photosynthesis of sugarcane plants.
publisher Pesquisa Agropecuaria Brasileira
publishDate 2013
url https://seer.sct.embrapa.br/index.php/pab/article/view/14406
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