A schematic illustration of SlTrxh positively regulates nitrate stress tolerance through S-nitrosation in tomato. (IMAGE)
Caption
A schematic illustration of SlTrxh positively regulates nitrate stress tolerance through S-nitrosation in tomato. In the SlTrxh overexpression plants, SlMYB86 directly binds to the promoter of SlTrxh, thereby activating its expression. The NO accumulation and the S-nitrosation of SlTrxh were induced under nitrate stress, with Cys54 identified as a crucial site for this process. The S-nitrosation enhances the interaction between SlTrxh and SlGrx9, thereby improving tomato’s resistance to nitrate stress with lower ROS accumulation. While in the SlTrxh RNAi plants, the expression and S-nitrosated level of SlTrxh was reduced and the interaction of SlTrxh and SlGrx9 was lower than overexpression plants under nitrate stress with more ROS accumulation.
Credit
Horticulture Research
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