Phytochrome Interacting Factors Involving in Auxin-regulated Plant Growth and Development

doi:10.13560/j.cnki.biotech.bull.1985.2021-1475

Abstract

Abstract:

Phytochrome interacting factors（PIFs）belong to the basic helix-loop-helix（bHLH）transcription factor family，they interact specifically with the active conformer of phytochrome（PHYS）photoreceptors in the nucleus and are decomposed. PIFs participate in various signal transduction pathways to regulate plant growth and development，such as repressing seed germination，promoting seedling skotomorphogenesis and flowering time. As an important part of the regulation of intracellular signals，PIFs are widely involved in the signaling network mediated by external environmental factors（such as high temperature，light）and internal hormones（such as auxin，cytokinin，brassinolide，etc.）. When the light signal and temperature change，PIFs are involved in auxin synthesis，transport and signaling to regulate plant growth and development. This review mainly introduces the advances of PIFs involving in auxin-regulated plant growth and development in recent years，and prospects the future research direction.

Key words: phytochrome interacting factors, auxin, light signal, growth and development

QIAN Jing-jie, LIN Su-meng, ZHANG Dong-ping, GAO Yong. Phytochrome Interacting Factors Involving in Auxin-regulated Plant Growth and Development[J]. Biotechnology Bulletin, 2022, 38(10): 29-33.

Figures/Tables 1

Fig.1 PIFs participate in auxin synthesis，transport and signaling to regulate plant growth and development A：Low red/far-red ratios promote PIFs accumulation. PIFs regulate the auxin synthesis by promoting the expressions of TAA1，YUC，and CYPT9B2 and inhibiting the expression of UGT76F1. B：UV-B inhibits PIFs expression. PIFs regulate the auxin synthesis to influence hypocotyl elongation. C：Under low red/far-red ratios，PIFs involve in auxin transport and signaling to regulate plant growth and development. D：Blue light inhibits PIFs expression to regulate the auxin signaling pathway. E：High temperature promotes PIF4 accumulation to regulate auxin synthesis，transport and signaling transduction. F：Natural light inhibits the expressions of PIFs. PIFs regulate the expression of lirSAUR gene in different organs of plants to affect plant growth and development

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