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Physiological and Biochemical Characterization of Rice Varieties under Salt and Drought Stresses

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Title Physiological and Biochemical Characterization of Rice Varieties under Salt and Drought Stresses
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Creator Ashwani Kumar, Charu Lata, SL Krishnamurthy, Arvind Kumar, KRK Prasad and Neeraj Kulshreshtha
 
Subject Water deficit, Salinity, Biochemical responses, Chlorophyll conten, Yield attributes, Rice varieties
 
Description Not Available
A well-focused approach combining the physiological and biochemical aspects of stress tolerance is essential to
evaluate the drastic effects of salinity and drought. This strategy involves comparative investigation of various
morphological, physiological, biochemical responses together with ionic relationship at vegetative stage under
salt stress coupled with drought. Two salt-tolerant (CSR 10 and CSR 36) and two susceptible (IR 29 and Pusa
44) varieties of rice were subjected to salt stress coupled with drought stress conditions. Results showed significant
decline in growth, chlorophyll content, number of tillers, productive tillers, biomass and yield in sensitive
varieties, while tolerant varieties were less affected due to stress conditions. Total soluble sugars, proline and
protein content increased with inclined stress in all the varieties, which showed osmotic adjustment in terms of
accumulation of compatible solutes. The varieties CSR 10 and CSR 36 accumulated less Na+ ion in leaves
under stress. Under combined stresses, the highest value of K+/Na+ ratio was recorded in CSR 36, whereas,
lowest in IR 29. In comparison with control treatment, at 100mM NaCl along with 25% water deficit (WD) and
50% WD, highest reduction in grain yield was shown by IR 29 (96.6%) followed by Pusa 44 (80.64% and
98.6%), CSR 36 (44.86% and 52.7%) and CSR 10 (21.0% and 28.3%). Study concluded that growth parameters,
physiological and biochemical traits had a significant varietal variation, indicating that these parameters could
be used as screening criteria for selecting the tolerant and sensitive cultivars exposed to water limiting stresses
(salinity and drought).
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Date 2018-11-14T11:42:30Z
2018-11-14T11:42:30Z
2017-01-01
 
Type Research Paper
 
Identifier Ashwani Kumar, Charu Lata, SL Krishnamurthy, Arvind Kumar, KRK Prasad and Neeraj Kulshreshtha (2017) Physiological and Biochemical Characterization of Rice Varieties under Salt and Drought Stresses. Journal of Soil Salinity and Water Quality. 9(2): 167-177
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http://krishi.icar.gov.in/Publication/handle/123456789/11307
 
Language English
 
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Publisher Not Available