期刊
PLANT PHYSIOLOGY AND BIOCHEMISTRY
卷 185, 期 -, 页码 178-187出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2022.05.035
关键词
Wheat; Hsf; Phosphate deficiency; Transgenic; Arabidopsis; RNA-seq
资金
- National Natural Science Foundation of China [32001546]
- Natural Science Foundation of Hubei Province of China [2019CFB296]
- Scientific Research Project of Jingchu University of Technology [QDJ201901]
The heat shock factor TaHsfA2d plays a crucial role in mediating plant responses to Pi deficiency stress, with its overexpression leading to increased sensitivity to Pi deficiency and regulation of stress response and flavonoid biosynthesis genes.
Phosphate (Pi) availability has become a major constraint limiting crop growth and production. Heat shock factors (Hsfs) play important roles in mediating plant resistance to various environmental stresses, including heat, drought and salinity. However, whether members of the Hsf family are involved in the transcriptional regulation of plant responses to Pi insufficiency has not been reported. Here, we identified that TaHsfA2d, a member of the heat shock factor family, was strongly repressed by Pi deficiency. Overexpressing TaHsfA2d-4A in Arabidopsis results in significantly enhanced sensitivity to Pi deficiency, evidenced by increased anthocyanin content, decreased proliferation and elongation of lateral roots, and reduced Pi uptake. Furthermore, RNA-seq analyses showed that TaHsfA2d-4A functions through up-regulation of a number of genes involved in stress responses and flavonoid biosynthesis. Collectively, these results provide evidence that TaHsfA2d participates in the regulation of Pi deficiency stress, and that TaHsfA2d could serve as a valuable gene for genetic modification of crop tolerance to Pi starvation.
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