Consequences of Short Term Low Temperature Stress on Physiological and Biochemical Aspects of Rice (Oryza sativa L.)
Journal Title: Scientia Agriculturae - Year 2015, Vol 10, Issue 1
Abstract
Abiotic stresses impinge on rice production all over the world counting Pakistan. Among the stresses, low temperature is one of the most vital factors which have a strong impact on growth, survival, reproduction and distribution of plants. In focus of the above problems, experiments were planned to explore the effect of low temperatures (0◦C, -2◦C, -4◦C, -6◦C) and control for 2 hours in two rice cultivars Basmati-385(B-385) & Shaheen Basmati (SB). The effect on germination percentage and germination rate remained unaffected in both cultivars. Only at -4◦C increase in average root length was observed and also non significant reduction in fresh or dry shoot/root weights were occurred in both varieties. A significant increase in cell membrane injury was seen in treated seeds as compared to control in SB & B-385. Low temperature stress decrease content of photosynthetic pigments as chlorophyll ‘a’, chlorophyll ‘b’ and carotenoids by comparing control. Carotenoids showed high values than chlorophyll ‘a’ and chlorophyll ‘b’. The nitrogen and protein contents in low temperature treatments were almost same in level as in relation to non stressed seeds. There was no significant variation in the ion contents (Na+, K+, and Ca+2) under different low temperature treatment. SDS-PAGE analysis of leaves proteins showed different banding patterns in both of verities under different stress and control conditions.
Authors and Affiliations
Mehmood Jan, Kamran Iqbal Shinwari, Gulmeena Shah, Muhammad Hafeez Ullah Khan, Saadat Ullah, Akhtar Hameed, Ijaz Malook
Keywords
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- EP ID EP148080
- DOI 10.15192/PSCP.SA.2015.10.1.114
- Views 103
- Downloads 0
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