既主内政, 又辖外交——以PHR为中心的基因网络调控植物-菌根真菌的共生
收稿日期: 2021-10-12
录用日期: 2021-10-18
网络出版日期: 2021-10-26
基金资助
科技部重大研发计划(2016YFD0100700);国家自然科学基金(318870236)
Managing Both Internal and Foreign Affairs—A PHR-centered Gene Network Regulates Plant-mycorrhizal Symbiosis
Received date: 2021-10-12
Accepted date: 2021-10-18
Online published: 2021-10-26
磷是植物生长发育必需的大量矿质营养元素, 但自然界大部分土壤都存在严重缺磷的问题。为了适应这一营养逆境, 植物演化出一系列低磷胁迫应答反应。通过改变基因的转录水平调控低磷胁迫应答反应, 而转录因子PHR1在调控植物对低磷胁迫的转录响应中起关键作用。此外, 大部分陆生植物还能与丛枝菌根真菌建立共生关系, 通过丛枝菌根真菌更有效地从土壤中获取磷元素。最近, 中国科学院分子植物科学卓越创新中心王二涛研究组发现, 以PHR为中心的转录调控网络控制植物-丛枝菌根真菌共生的建立。因此, PHR不但在维持植物细胞自身的磷稳态中发挥作用, 而且参与植物与外界微生物的相互作用, 为植物有效地从环境中获得磷元素提供了另外一条途径。
刘栋 . 既主内政, 又辖外交——以PHR为中心的基因网络调控植物-菌根真菌的共生[J]. 植物学报, 2021 , 56(6) : 647 -650 . DOI: 10.11983/CBB21177
Phosphorus is a macronutrient essential for plant growth and development, however, phosphate (Pi), the major form of phosphorus absorbed by plants, is quite limiting in soil. To cope with this nutritional stress, plants have evolved an array of adaptive responses, which are largely regulated by changing gene expression in response to Pi deficiency. The transcription factor, PHR1 plays a key role in regulating plant transcriptional response to Pi deficiency. Besides, most land plants can form symbiosis with arbuscular mycorrhizal (AM) fungi, through which plants can obtain Pi from soil more effectively. Recently, the research group of Ertao Wang of Center for Excellence in Molecular Plant Science, Chinese Academy of Sciences, reported that a PHR-centered gene regulatory network plays an essential role in promoting plant-AM symbiosis. Therefore, PHR not only functions in maintaining plant Pi homeostasis, but also in communicating with beneficial microorganisms in the environments, which provides another route for plants to obtain Pi from soil.
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