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Journal of Agronomy
  Year: 2008 | Volume: 7 | Issue: 1 | Page No.: 98-101
DOI: 10.3923/ja.2008.98.101
 
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Biochemical and Physiological Responses in Two Vigna uguiculata (L.) Walp. Cultivars Under Water Stress

R.C.L. Costa, A.K.S. Lobato, C.F. Oliveira Neto, P.S.P. Maia , G.A.R. Alves and H.D. Laughinghouse

Abstract:
The aim of this study was to evaluate and compare the effects of water stress on biochemical and physiological parameters of Vigna unguiculata (L.) Walp. (Sempre verde and Pitiuba), as well as reveal the cultivar that better adapts under water stress. The experimental design was randomized entirely in factorial, with 2 cultivars (Sempre verde and Pitiuba), combined with 2 water conditions (stress and control). Tenors of proline, free amino acids, total soluble carbohydrates and total soluble proteins were quantified and the nitrate reductase activity was measured. The plants submitted to stress suffered an increase in the amounts of proline, since this solute is an osmotic adjuster. There was an increase in the amounts of amino acids due to an increase in the protease enzyme activity and an increase in the total carbohydrate levels, caused by the increase of starch. A decrease in the amounts of total protein caused by the decrease in their synthesis and a fall in nitrate reduction activity caused by the low nitrate influx were reported. These responses were seen in both cultivars. The Pitiuba cultivar presented responses that show better osmotic adjustment in these conditions, revealing a greater adaptability of this cultivar in conditions of hydric stress.
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How to cite this article:

R.C.L. Costa, A.K.S. Lobato, C.F. Oliveira Neto, P.S.P. Maia , G.A.R. Alves and H.D. Laughinghouse, 2008. Biochemical and Physiological Responses in Two Vigna uguiculata (L.) Walp. Cultivars Under Water Stress . Journal of Agronomy, 7: 98-101.

DOI: 10.3923/ja.2008.98.101

URL: https://scialert.net/abstract/?doi=ja.2008.98.101

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