Identification of microRNA-target interactions for antioxidant defense response under drought stress by high-throughput sequencing in Zanthoxylum bungeanum Maxim

Author:

Fei Xitong,Hu Haichao,Li Jingmiao,Liu Yulin,Wei Anzhi

Abstract

ABSTRACTWhen the plant is in an unfavorable environment such as drought or high temperature, it will accumulate a large amount of active oxygen, which will seriously affect the normal growth and development of the plant. The antioxidant system can remove the reactive oxygen species produced under drought conditions and so mitigate oxidative damage. We examined the trends of antioxidant enzymes, miRNAs and their target genes in Zanthoxylum bungeanum under drought stress. According to the changes of antioxidant enzymes, miRNAs and their target genes expression patterns of Zanthoxylum bungeanum under drought stress, an interaction model was constructed to provide a reference for further understanding of plant antioxidant mechanism. The results indicate that under drought stress, POD, CAT, APX, proline, MDA and related genes all show positive responses to drought, while SOD and its genes showed a negative response. It is speculated that in the antioxidant process of Zanthoxylum bungeanum, POD, CAT, and APX play a major role, and SOD plays a supporting role. In addition, the expression levels of miRANs and their target genes were basically negatively correlated, indicating that miRNAs are involved in the regulation of the antioxidant system of Zanthoxylum bungeanum.

Publisher

Cold Spring Harbor Laboratory

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