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Provedor de dados:  Acta Agron. (Palmira)
País:  Colombia
Título:  Gas exchange in 'BRS Princesa' banana ( Musa spp.) under partial rootzone drying irrigation in the north of Minas Gerais, Brazil
Autores:  Santos,Marcelo Rocha dos
Rodrigues Donato,Sérgio Luiz
Arantes,Alessandro de Magalhães
Coelho,Eugênio Ferreira
Oliveira,Polyanna Mara de
Data:  2017-09-01
Ano:  2017
Palavras-chave:  Abiotic stress
Irrigation techniques
Photosynthetic rate
Stomatal closure
Vegetative growth
Water deficit
Resumo:  Abstract This research aimed to evaluate physiological characteristics of 'BRS Princesa' banana under partial rootzone drying irrigation, PRD. The five treatments, 1 - 50% of reduction in water depth (WD) with a frequency alternation of irrigation side (FA) of seven days during the whole production cycle; 2 - 50% of WD and FA of 14 days in the cycle; 3 - 50% of WD and FA of 21 days; 4 - 50% of WD with a fixed irrigation (only one lateral line on one side of the plant); and 5 - full irrigation (two lateral lines with open shutoff valve) throughout the cycle, they were arranged in a randomized block design with five replicates. There is a reduction in photosynthetic rates and water use efficiency as a result of enzymatic impairment or stomatal closure, due to the increased of leaf temperature. The stomatal conductance - gs was lower in plants irrigated with 50% of ETc with fixed irrigation in one side of the plant. Even with water deficit in the soil, using the PRD with 50% of ETc, Photosynthesis - A Transpiration - E; Leaf temperature - Tleaf, internal concentration of CO2 - Ci; stomatal conductance - gs; photosynthetically active radiation - Qleaf; carboxylation efficiency - A/Ci; Quantum efficiency of Photosynthesis - A/Qleaf; and instantaneous water use efficiency - WUE 'BRS Princesa' banana were similar among strategies, highlighting the possibility of use of the irrigation management technique with PRD, saving water, and no physiological changes in the plants.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Universidad Nacional de Colombia
Relação:  10.15446/acag.v66n3.55056
Formato:  text/html
Fonte:  Acta Agronómica v.66 n.3 2017
Direitos:  info:eu-repo/semantics/openAccess

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