Exogenous Putrescine Enhances Rice Seed Germination in Salinity Stress

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Abstract
Putrescine plays a distinct role in various types of biological functions in all living organisms, as well as environmental stress. The aim of the study is to effect of exogenous putrescine on the physiological condition of the rice seeds investigated. Salt treatment resulted in the reduction of speed of germination, germination, germination energy, germination energy percentage, final germination percentage, shoot and root length, and plant dry weight, where proline content was remarkably increased. Among the rice varieties, BRRI 48 was affected maximum by way of salinity in case of germination and growth, and GHORIAL become least affected in comparison to other varieties. However, exogenous putrescine treatment significantly enhances rice seeds germination, as well as shoot and root length in all varieties. Our findings reveal that plant putrescine tremendously reduced rice salt tolerance.

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