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Susceptibility and tolerance of rice crop to salt threat: Physiological and metabolic inspections

Ma, Nyuk Ling and Che Lah, Wan Afifudeen and Abd. Kadir, Nisrin and Mustaqim, Mohamad and Rahmat, Zaidah and Ahmad, Aziz and Lam, Su Datt and Ismail, Mohd. Razi (2018) Susceptibility and tolerance of rice crop to salt threat: Physiological and metabolic inspections. Plos ONE, 13 (2). e0192732- e0192732. ISSN 1932-6203

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Official URL: http://dx.doi.org/10.1371/journal.pone.0192732


Salinity threat is estimated to reduce global rice production by 50%. Comprehensive analysis of the physiological and metabolite changes in rice plants from salinity stress (i.e. tolerant versus susceptible plants) is important to combat higher salinity conditions. In this study, we screened a total of 92 genotypes and selected the most salinity tolerant line (SS1-14) and most susceptible line (SS2-18) to conduct comparative physiological and metabolome inspections. We demonstrated that the tolerant line managed to maintain their water and chlorophyll content with lower incidence of sodium ion accumulation. We also examined the antioxidant activities of these lines: production of ascorbate peroxidase (APX) and catalase (CAT) were significantly higher in the sensitive line while superoxide dismutase (SOD) was higher in the tolerant line. Partial least squares discriminant analysis (PLS-DA) score plots show significantly different response for both lines after the exposure to salinity stress. In the tolerant line, there was an upregulation of non-polar metabolites and production of sucrose, GABA and acetic acid, suggesting an important role in salinity adaptation. In contrast, glutamine and putrescine were noticeably high in the susceptible rice. Coordination of different strategies in tolerant and susceptible lines show that they responded differently after exposure to salt stress. These findings can assist crop development in terms of developing tolerance mechanisms for rice crops.

Item Type:Article
Uncontrolled Keywords:ROS scavenging, rice plants
Subjects:Q Science > Q Science (General)
Divisions:Biosciences and Medical Engineering
ID Code:85935
Deposited By: Widya Wahid
Deposited On:30 Jul 2020 15:39
Last Modified:30 Jul 2020 15:39

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