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Overexpressing osa-miR171c decreases salt stress tolerance in rice
Wu Yang,Tian Fan,Xiaoying Hu,Taihui Cheng,Mingyong Zhang 한국식물학회 2017 Journal of Plant Biology Vol.60 No.5
The miRNA171 family is one of the well-conservedmiRNA families, and its role under stresses is not knownexcept its expression on genome-wide expression analyses. osa-miR171c was induced by high concentration of salt (150mM NaCl). A rice dh mutant with osa-miR171c overexpressiontriggered by a T-DNA insertion, significantly decreased salttolerance at the stages of germination and seedling. Thisphenotype was confirmed by osa-miR171c overexpressiontransgenic rice. Compared with wild-type (WT), dh mutantreduced amounts of free proline and increased the water lossrate after salt treatment. Stomatal density in the leafepidermis of dh mutant also increased. Moreover, dh mutantincreased sensitivity to ABA treatment. Several stressresponsivegenes were down-regulated in dh mutant than inWT under salty stress. These results indicate that osamiR171cis involved in modulating physiological changes,stomatal development, ABA-dependent pathways and expressionof stress-related genes; thereby, it possibly contributes tosalty tolerance.