摘要
光敏色素相互作用因子(PIFs)属于拟南芥bHLH转录因子家族的第15亚族,是光信号响应过程中的关键负调控因子。光激活的光敏色素通过促进PIFs蛋白降解,直接或间接抑制它们与DNA的结合,从而实现光对植物生长发育的调控。研究发现PIFs在调控种子萌发、幼苗形态建成、避荫反应、昼夜节律以及各种植物激素响应过程中起着重要作用。此外,PIFs作为细胞信号传导的"枢纽"具有更为广泛的作用,能够整合不同信号,精细调控整个转录网络。
Phytochrome interacting factors ( PIFs ) belonging to Arabidopsis basic helix -loop -helix ( bHLH) transcription factors subgroup 15 are key regulators in light signal transduction .Light -activated phytochromes regulate plant growth and development by promoting the degradation of PIFs and directly or indi -rectly inhibiting their DNA binding activity .Studies showed that PIFs played important roles in the regulation of seed germination, seedling morphogenesis , shade avoidance , circadian clock, phytohormone biosynthesis and signal transduction .PIFs have broader roles than previously expected and work as a cellular signaling hub that integrates multiple signals to orchestrate the transcriptional network of plants .
出处
《山东农业科学》
2014年第6期150-156,共7页
Shandong Agricultural Sciences
基金
"973"前期研究专项(2012CB126313)
山东省项目(BS2013SW006
ZR2010CZ002
ZR2011CZ002
2012ZHZXIA0418)
山东省生物资源创新项目
国家科技计划(2013AA102602)
山东省"泰山学者"基金资助
关键词
光敏色素相互作用因子
光敏色素
信号传导
植物激素
植物生长发育
Phytochrome interacting factors
Phytochrome
Signal transduction
Phytohormone
Plant growth and development