摘要
磷是植物生长发育必需的大量营养元素之一。土壤中的磷主要以无机磷酸盐(inorganic phosphate, Pi)的形式被植物吸收。然而,土壤中的Pi易被固定,有效性较低。因此,研究植物响应缺Pi胁迫的分子机制对于提高作物磷素的有效利用具有重要意义。近20年来,植物缺Pi响应调控机制的研究取得了突破性进展。本文对近年来国内外研究进展进行了系统性的综述,包括植物局部缺Pi胁迫响应信号介导的根构型改变,以缺Pi响应因子PHR(PHOSPHATE STARVATION RESPONSE)-SPX(SYG1/Pho81/XPR1)为中心的植物系统性缺Pi响应信号网络的调控机制,缺Pi条件下水稻丛枝菌根真菌共生的分子机制,植物对磷素从根际到地上部的运输和分配机制,以及植物叶片向籽粒转运磷素的再分配与再利用机制等。最后,我们对今后缺Pi胁迫响应分子机制的研究方向进行了探讨。该综述通过对已有研究成果的总结和对未来研究方向的展望,以期为植物缺Pi胁迫响应分子机制研究和作物磷高效改良提供科学参考。
Phosphorus(P)is one of the essential macronutrients for plant growth and development.Plants absorb phosphorus from the soil mainly in the form of inorganic phosphate(Pi).However,Pi in the soil is easily fixed,and its availability is low.Therefore,it is of great significance to study the molecular mechanisms of Pi starvation response(PSR)for improving the effective utilization of P in crops.In the past 20 years,great progress has been made in the study of the regulatory mechanisms of plant responses to Pi deficiency.Here,we systematically reviewed the research progress achieved in recent years both domestically and internationally,including local PSR signaling-mediated alteration of root morphogenesis,the PHR(PHOSPHATE STARVATION RESPONSE)-SPX(SYG1/Pho81/XPR1)-centered systemic PSR signaling network,the molecular mechanism of the symbiosis of rice arbuscular mycorrhizal fungi under Pi stress conditions,the transportation and allocation of Pi from rhizospheres to shoots,and the relocation and reuse of Pi from leaves to seeds.Finally,we discussed the future research priorities on the molecular mechanisms of PSR.This review summarizes current results and looks forward to future research directions to facilitate the study of PSR in plants and the improvements of Pi utilization efficiency in crops.
作者
刘荣
李兵杰
王智烨
LIU Rong;LI Bingjie;WANG Zhiye(State Key Laboratory of Plant Environmental Resilience,College of Life Sciences,Zhejiang University,Hangzhou 310058,Zhejiang,China)
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2024年第3期455-468,共14页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
国家重点研发计划重点专项(2021YFF1000402)。
关键词
缺磷胁迫
水稻
拟南芥
分子调控机制
磷高效利用
inorganic phosphate(Pi)starvation stress
rice
arabidopsis
molecular regulatory mechanism
high Pi utilization efficiency
