光敏色素互作因子参与生长素调控的植物生长发育

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

光敏色素互作因子(PIFs)属于碱性螺旋-环-螺旋(bHLH)转录因子家族,能在细胞核内与活性形式的光敏色素(PHYS)相互作用并被降解。PIFs参与多种信号转导途径,调控植物的生长发育,如抑制种子萌发、促进幼苗的暗形态建成和植物开花等。作为胞内信号调控的重要组分,PIFs广泛参与植物外部环境因素(如高温、光),以及内部激素(如生长素、细胞分裂素和油菜素内酯等)介导的信号网络。当光信号和温度变化时,PIFs会通过影响生长素合成、运输和信号转导,参与生长素路径,调控植物生长发育。论文就PIFs参与生长素调控的植物生长发育研究进展进行综述,并对未来研究方向加以展望。

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.