Gas exchanges of melon under water stress in the Submedium region of the São Francisco River Valley.

The current scenario of increased water scarcity is due to climate change and directly affects food production. It is thus necessary to develop strategies to mitigate the impacts of low water availability. Therefore, the goal of the present study is to evaluate the physiological behaviour of melon cultivars under water stress. The experiment was conducted in a protected environment in the experimental Submedium region of the São Francisco River Valley in the period ranging from October to December. In this study, we used the melon cultivars 'Amarelo' and 'Piel de Sapo'. The experiment was conducted in a randomized block design with three replicates that were subdivided into plots, where the plots were comprised of four irrigation rates (50, 75, 100, and 125% of crop vapotranspiration ? CET), subplots were comprised of the two melon cultivars, and sub-subplots were comprised of samplings for physiological analyses (15, 30, and 45 days after transplanting). The parameters evaluated were stomatal conductance, transpiration, net photosynthesis, relationship CI/CA, and accumulated dry matter. Water stress reduced the stomatal conductance, transpiration, net photosynthesis, CI/CA, and accumulated dry matter. 'Piel de Sapo' showed a higher photosynthetic adjustment than 'Amarelo' melon due to the gas exchange behaviour of the former, and it was, therefore, more tolerant to water stress.

Bibliographic Details

Main Authors:	VIEIRA, D. A., MESQUITA, A. C., MARINHO, L. B., SOUZA, V. de, AIDAR, S. de T., CARVALHO, M. M. P.
Other Authors:	DANIEL AMORIM VIEIRA, Departamento de Tecnologia e Ciências Sociais/Universidade do Estado da Bahia; ALESSANDRO CARLOS MESQUITA, Departamento de Tecnologia e Ciências Sociais/Universidade do Estado da Bahia; LÍGIA BORGES MARINHO, Departamento de Tecnologia e Ciências Sociais/Universidade do Estado da Bahia; VANUZA DE SOUZA, Departamento de Tecnologia e Ciências Sociais/Universidade do Estado da Bahia; SAULO DE TARSO AIDAR, CPATSA; MARÍLIA MICKAELE PINHEIRO CARVALHO, Departamento de Tecnologia e Ciências Sociais/Universidade do Estado da Bahia.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	2023-07-03
Subjects:	Estresse hídrico, Vale do São Francisco, Trocas gasosa, Cucumis Melo, Melão, Matéria Seca, Dry matter content,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1154757
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