SPAs promote thermomorphogenesis by regulating the phyB-PIF4 module in Arabidopsis.

ABSTRACT: High ambient temperature attributable to global warming has a profound influence on plant growth and development at all stages of the life cycle. The response of plants to high ambient temperature, termed thermomorphogenesis, is characterized by hypocotyl and petiole elongation and hyponastic growth at the seedling stage. However, our understanding of the molecular mechanism of thermomorphogenesis is still rudimentary. Here, we show that a set of four SUPPRESSOR OF PHYA-105 (SPA) genes is required for thermomorphogenesis. Consistently, SPAs are necessary for global changes in gene expression in response to high ambient temperature. In the spaQ mutant at high ambient temperature, the level of SPA1 is unaffected, whereas the thermosensor phytochrome B (phyB) is stabilize

SUBMITTER: Lee S 

PROVIDER: S-EPMC7561471 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature