High temperature and salt stress response in French bean (Phaseolus vulgaris)

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Nagesh Babu, R. and Devaraj, V.R. (2008) High temperature and salt stress response in French bean (Phaseolus vulgaris). Australian Journal of Crop Science, 2 (2). pp. 40-48. ISSN 1835-2707

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Abstract

Abiotic stresses, such as high temp., and salt stress are major factors which reduce crop productivity. Effects of high temp. (46-​48° C) and salt stress (0.4 M) on French bean (Phaseolus vulgaris)​, a major vegetable crop, were evaluated in terms of antioxidants and antioxidant enzymes in S-​9 cultivar. Both stresses caused similar responses in the plant. Oxidative stress indicators such as H2O2, TBARS, glutathione, ascorbic acid, and proline were significantly elevated. Similarly, antioxidant enzyme, guaiacol-​specific peroxidase (POX) was significantly elevated. Other enzymes, β-​amylase and acid phosphatase (AP) activities were marginally enhanced. However, stresses had contrasting effects on glutathione reductase (GR) and catalase (CAT)​, which were drastically reduced in temp. stress, and elevated in salt stress. No variations were obsd. in AP, POX, and CAT isoenzymes. Patterns of GR and β-​amylase isoenzymes differed between temp. and salt stress. SDS-​PAGE indicated entirely different sets of proteins in temp. and salt stressed seedlings. Growth rate and fresh mass were affected to same extent, relative to their resp. controls. DNA damage was more pronounced under temp. stress than under salt stress. Response mechanism of French bean appears to involve some players which are common to both the stresses, and few specific to individual stress.

Item Type: Article
Uncontrolled Keywords: Antioxidants; Antioxidant enzymes; French bean; Isozymes; Temperature stress; Salt stress.
Subjects: Faculty of Science > Environmental and Biological Sciences > Biochemistry
Divisions: Jnana Bharathi / Central College Campus > Department of Biochemistry
Depositing User: Ms. Deepa M Kolli
Date Deposited: 06 Sep 2016 06:43
Last Modified: 06 Sep 2016 06:43
URI: http://eprints-bangaloreuniversity.in/id/eprint/5329

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