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Luong The Minh. 2016. Effects of Salinity Stress on Growth and Chemical Components of Rice (Oryza sativa L.). MSc. Thesis - Hiroshima University, JAPAN (March 2016)
Thứ ba, 22-03-2016 | 13:36:34

Phong Cong Nghe Sinh Hoc, IAS, Email: ltminh87@gmail.com


Salt stress is one of the most brutal abiotic stresses that limit profitable rice production worldwide. Salinity causes complex interactions among different morphological, physiological and biochemical processes. Salinity may cause oxidative stress due to highly producing of reactive oxygen species (ROS) leading to alteration plant metabolism. As a result, DNA, proteins, lipids, carbohydrates and membranes are damaged.


 This study was conducted to determine the effects of salinity stress on both growth and chemical components in rice. It was observed that salinity stress caused a significant decrease in shoot lengths, fresh and dry weights of six tested rice varieties. Under salinity stress, changes of chemical contents also differed among phenolic compounds and rice cultivars. Although total phenolics and flavonoids, and contents of vanillin and protocatechuic acid in tolerant varieties were strongly increased, they were markedly reduced in susceptible cultivar. Ferulic acid and p-coumaric acid were detected only in tolerance rice. Vanillin and protocatechuic acid may play a role, but ferulic acid and p-coumaric acid may be much involved in the tolerant mechanism against salinity stress. These results suggested that ferulic acid and p-coumaric acid and their derivatives may be exploited as promising as agents to reduce detrimental effects from salinity stress in rice production.


Figure 5. Rice sample extracts were used for analyzing chemical.



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