Data/hora: 09/06/2024 03:47:52

Provedor de dados: 	58	
País: 	Brazil	
Título: 	WATER STRESS RESPONSE ON THE ENZYMATIC ACTIVITY IN COWPEA NODULES	
Autores: 	Figueiredo,Márcia do Vale B.; Bezerra-Neto,Egídio; Burity,Hélio A.	
Data: 	2001-10-01	
Ano: 	2001	
Palavras-chave: 	Drought stress; Vigna unguiculata; Nodulins.	
Resumo: 	A greenhouse experiment was carried out aiming to study the effect of water stress on metabolic activity of cowpea nodules at different plant development stages. Cowpea plants were grown in pots with yellow latosol soil under three different matric potentials treatments: -7.0 (control-S1), -70.0 (S2) and &lt;-85.0 KPa (S3). The experimental design was randomized blocks with sub-divided plots, each plot containing a different degree of water stress, divided in sub-plots for the four different developmental stages: E1 (0-15), E2 (15-30), E3 (20-35) and E4 (30-45) days after emmergence. Water stress treatments were applied by monitoring soil water potential using a set of porous cups. The effect of water stress was most harmful to cowpea when it was applied at E2 than at other symbiotic process stages. Shoot/root ratio decreased from 2.61 to 2.14 when matric potential treatment was &lt;-85.0 and -70.0 KPa respectively. There was a reduction in the glutamine synthetase activity and phosphoenolpyruvate carboxilase activity with increased stress, while glutamine synthase activity was the enzyme most sensitive to water stress. Glutamate dehydrogenase activity increased in more negative matric potential, indicating that this enzyme is sufficiently activitye under water stress.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000300006	
Editor: 	Sociedade Brasileira de Microbiologia	
Relação: 	10.1590/S1517-83822001000300006	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Microbiology  v.32 n.3 2001	
Fonte: 	info:eu-repo/semantics/openAccess