Nitrogen compounds and enzyme activities in sorghum induced to water deficit during three stages

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The aim of this study was to evaluate and explicate the changes in the nitrogen compounds and enzyme activities in Sorghum bicolor plants (cv. Br-700) submitted to water deficit during vegetative, reproductive and maturation stages. The experimental design used was entirely randomized in factorial scheme, with two conditions (control and stress) combined with three stages (vegetative, reproductive and maturation). The nitrate level was increased at 180.6, 72.9 and 78.9% during the vegetative, reproductive and maturation stages, respectively. The total soluble amino acids and glycinebetaine increased only during vegetative and reproductive stages, if compared with control plants. However, besides protein levels during all stages, significant reductions were reported in nitrate reductase and glutamine synthetase activities; free ammonium presented decreases at 37.3 and 77.6% in vegetative and reproductive stages, respectively, when compared with control plants. … full description

Bibliographic Details

Other Authors

C. F. Oliveira Neto, A. K. S. Lobato, R. C. L. Costa, W. J. M. S. Maia, Santos B. G. Filho, G. A. R. Alves, B. Brinez, H. K. B. Neves, M. J. Santos Lopes, F. J. R. Cruz

Document Type

Articles

Physical Description

3 il.

Published in

Plant, Soil and Environment. -- ISSN 1214-1178. -- Roč. 55, č. 6 (2009), s. 238-244

Subjects

SORGHUM BICOLOR

SORGHUM GRAIN

PLANT DEVELOPMENTAL STAGES

DROUGHT STRESS

NITROGEN

NITRATES

AMMONIUM NITROGEN

AMINO ACIDS

ENZYME ACTIVITY

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Item Description

Grafy

Bibliography

Bilbiografie na s. 243-244