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植物学报（英文版）
植物学报（英文版）

刘春明

月刊

1672-9072

jipb@ibcas.ac.cn

010-62836133，010-62836563

100093

北京香山南辛村20号中科院植物所内

植物学报（英文版）/Journal Journal of Integrative Plant BiologyCSCDCSTPCD北大核心SCI
查看更多>>本学报是植物学综合性学术期刊。国外发行与交换达40多个国家和地区。国际标准A4大16开铜版纸印刷。本学报力争全面反映我国植物科学的最新研究成果，关注国际热点、新的学科生长点、前沿研究课题，重视报道重要的应用基础研究。主要栏目有植物生理生化、植物遗传学和分子生物学、植物生殖生物学、结构植物学、植物化学与资源植物学、植物系统与进化、植物生态学、古植物学的原始研究论文、综述和快讯。
正式出版
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    The regulatory mechanism of rapid lignification for timely anther dehiscence

    Jing-Shi XueYi-Feng FengMing-Qi ZhangQin-Lin Xu...
    1788-1800页
    查看更多>>摘要：Anther dehiscence is a crucial event in plant re-production,tightly regulated and dependent on the lignification of the anther endothecium.In this study,we investigated the rapid lignification process that ensures timely anther dehiscence in Arabidopsis.Our findings reveal that endothecium lignification can be divided into two distinct phases.During Phase Ⅰ,lignin precursors are synthesized without polymerization,while Phase Ⅱ involves simultaneous synthesis of lignin precursors and polymerization.The transcription factors MYB26,NST1/2,and ARF17 specifically regulate the pathway responsible for the synthesis and polymerization of lignin mon-omers in Phase Ⅱ.MYB26-NST1/2 is the key regu-latory pathway responsible for endothecium lig-nification,while ARF17 facilitates this process by interacting with MYB26.Interestingly,our results demonstrate that the lignification of the endothe-cium,which occurs within approximately 26 h,is much faster than that of the vascular tissue.These findings provide valuable insights into the regulation mechanism of rapid lignification in the endothecium,which enables timely anther dehiscence and suc-cessful pollen release during plant reproduction.
      原文链接:
    • 万方数据
    • 维普

    ICE1 interacts with IDD14 to transcriptionally activate QQS to increase pollen germination and viability

    Landi LuoYan ZhengXieshengyang LiQian Chen...
    1801-1819页
    查看更多>>摘要：In flowering plants,sexual reproductive success depends on the production of viable pollen grains.However,the mechanisms by which QUA QUINE STARCH(QQS)regulates pollen development and how transcriptional activators facilitate the transcription of QQS in this process remain poorly understood.Here,we demonstrate that INDUCER OF CBF EXPRESSION 1(ICE1),a basic helix-loop-helix(bHLH)transcription factor,acts as a key transcriptional activator and positively regulates QQS expression to increase pollen germination and viability in Arabidopsis thaliana by interacting with INDETERMINATE DOMAIN14(IDD14).In our genetic and biochemical experiments,over-expression of ICE1 greatly promoted both the ac-tivation of QQS and high pollen viability mediated by QQS.IDD14 additively enhanced ICE1 function by promoting the binding of ICE1 to the QQS pro-moter.In addition,mutation of ICE1 significantly repressed QQS expression;the impaired function of QQS and the abnormal anther dehiscence jointly affected pollen development of the ice1-2 mutant.Our results also showed that the enhancement of pollen activity by ICE1 depends on QQS.Furthermore,QQS interacted with CUT1,the key enzyme for long-chain lipid biosynthesis.This interaction both promoted CUT1 activity and regulated pollen lipid metabolism,ultimately de-termining pollen hydration and fertility.Our results not only provide new insights into the key function of QQS in promoting pollen development by regu-lating pollen lipid metabolism,but also elucidate the mechanism that facilitates the transcription of QQS in this vital developmental process.
      原文链接:
    • 万方数据
    • 维普