Data/hora: 23/09/2024 19:44:18

Biblioteca(s): 	Embrapa Semiárido.	
Data corrente: 	19/02/2021	
Data da última atualização: 	16/12/2021	
Autoria: 	BARROS, J. A. R.; GUIMARÃES, M. J. M.; SIMOES, W. L.; MELO, N. F. de; ANGELOTTI, F.	
Afiliação: 	Juliane Rafaele Alves Barros; Miguel Julio Machado Guimarães; WELSON LIMA SIMOES, CPATSA; NATONIEL FRANKLIN DE MELO, CPATSA; FRANCISLENE ANGELOTTI, CPATSA.	
Título: 	Water restriction in different phenological stages and increased temperature affect cowpea production.	
Ano de publicação: 	2021	
Fonte/Imprenta: 	Ciência e Agrotecnologia, v. 45, e022120, 2021.	
DOI: 	http://dx.doi.org/10.1590/1413-705420214502212	
Idioma: 	Inglês	
Conteúdo: 	Water deficit and high temperatures are abiotic factors that most limit plant growth and development. However, its effects depend on crop development stage and on stress duration and intensity. Thus, the objective of was to evaluate the development of cowpea subjected to water restriction in different phenological stages and to increase in air temperature. The experiment was conducted with the cultivar ?Carijó?, in growth chambers, in a 4 x 3 x 2 factorial arrangement, corresponding to levels of water availability (25, 50, 75, and 100%,), phenological stages (vegetative, flowering and pod filling) and temperature regimes (T°1: 20-26-33 °C e T°2: 24.8-30.8-37.8 °C), respectively. Reduction of water availability in the vegetative and flowering stages caused decrease in grain production. The percentage of aborted flowers was higher in plants maintained under an increased temperature of +4.8 °C, with consequent reduction in grain production. Higher water availability values favored shoot and root dry mass production. Increase of 4.8 °C did not affect shoot and root dry mass but reduced water use efficiency by about 83%. The highest enzymatic activities of CAT, GPX and SOD were found in plants subjected to the temperature of +4.8 °C. Only APX showed lower enzymatic activity with increasing temperature. The cv. ?Carijó? is more sensitive to the 4.8 °C increase in air temperature than to water deficits.	
Palavras-Chave: 	Aumento da temperatura; Estágios fenológicos; Restrição hídrica.	
Thesagro: 	Feijão; Fenologia; Temperatura; Vigna Unguiculata.	
Thesaurus Nal: 	Abiotic stress; Oxidative stress; Phenology.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/221343/1/Water-restriction-in-different-2021.pdf	
Registro original: 	Embrapa Semiárido (CPATSA)	
Exemplares: 	CPATSA - (59455-1) - UPC - AP - DD -  -  -  - DIS