Dehydration-Induced WRKY Transcriptional Factor MfWRKY70 of Myrothamnus flabellifolia Enhanced Drought and Salinity Tolerance in Arabidopsis.
Xiang-Ying XiangJia ChenWen-Xin XuJia-Rui QiuLi SongJia-Tong WangRong TangDuoer ChenCai-Zhong JiangZhuo HuangPublished in: Biomolecules (2021)
The resurrection plants Myrothamnus flabellifolia can survive long term severe drought and desiccation conditions and soon recover after rewatering. However, few genes related to such excellent drought tolerance and underlying molecular mechanism have been excavated. WRKY transcription factors play critical roles in biotic and abiotic stress signaling, in which WRKY70 functions as a positive regulator in biotic stress response but a negative regulator in abiotic stress signaling in Arabidopsis and some other plant species. In the present study, the functions of a dehydration-induced MfWRKY70 of M. flabellifolia participating was investigated in the model plant Arabidopsis. Our results indicated that MfWRKY70 was localized in the nucleus and could significantly increase tolerance to drought, osmotic, and salinity stresses by promoting root growth and water retention, as well as enhancing the antioxidant enzyme system and maintaining reactive oxygen species (ROS) homeostasis and membrane-lipid stability under stressful conditions. Moreover, the expression of stress-associated genes (P5CS, NCED3 and RD29A) was positively regulated in the overexpression of MfWRKY70 Arabidopsis. We proposed that MfWRKY70 may function as a positive regulator for abiotic stress responses and can be considered as a potential gene for improvement of drought and salinity tolerance in plants.
Keyphrases
- transcription factor
- genome wide identification
- arabidopsis thaliana
- heat stress
- plant growth
- climate change
- reactive oxygen species
- dna binding
- microbial community
- high glucose
- diabetic rats
- oxidative stress
- stress induced
- cell death
- heat shock
- gene expression
- genome wide
- binding protein
- fatty acid
- dna methylation
- atomic force microscopy
- single molecule
- anti inflammatory
- high speed