Molecular mechanisms underlying phosphate sensing, signaling, and adaptation in plants

• Published in: Journal of integrative plant biology Vol. 56; no. 3; pp. 192 - 220
• Main Authors: Zhang, Zhaoliang, Liao, Hong, Lucas, William J
• Format: Journal Article
• Language: English
• Published: China (Republic : 1949- ) Blackwell Publishing Ltd 01.03.2014; Department of Plant Biology, College of Biological Sciences, University of California, Davis, California 95616, USA%State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Root Biology Center, South China Agricultural University, Guangzhou 510642, China
• Subjects: Adaptation; Adaptation, Physiological - genetics; crop engineering strategies; crop production; crops; homeostasis; hormone networks; hormones; local and long-distance sensing; messenger RNA; microRNA; mRNA表达; P use efficiency; phloem; phosphate; Phosphates - metabolism; phosphorus; plant nutrition; Plants - genetics; Plants - metabolism; RNA, Long Noncoding - genetics; RNA, Long Noncoding - metabolism; root systems; signal transduction; Signal Transduction - genetics; stress responses; Stress, Physiological - genetics; sucrose; sustainable agriculture; systemic signaling; transcriptional regulation; transport systems; xylem; 传感; 作物生产; 信号传导途径; 分子事件; 分子机制; 植物营养素; 磷酸盐; P use efficiency; crop engineering strategies; transport systems; local and long-distance sensing; systemic signaling; transcriptional regulation; phosphate; stress responses; hormone networks; Adaptation; Puse efficiency
• ISSN: 1672-9072; 1744-7909
• DOI: 10.1111/jipb.12163

As an essential plant macronutrient, the low availability of phosphorus (P) in most soils imposes serious limitation on crop production. Plants have evolved complex responsive and adaptive mechanisms for acquisition, remobilization and recycling of phosphate (Pi) to maintain P homeostasis. Spatio‐temporal molecular, physiological, and biochemical Pi deficiency responses developed by plants are the consequence of local and systemic sensing and signaling pathways. Pi deficiency is sensed locally by the root system where hormones serve as important signaling components in terms of developmental reprogramming, leading to changes in root system architecture. Root‐to‐shoot and shoot‐to‐root signals, delivered through the xylem and phloem, respectively, involving Pi itself, hormones, miRNAs, mRNAs, and sucrose, serve to coordinate Pi deficiency responses at the whole‐plant level. A combination of chromatin remodeling, transcriptional and posttranslational events contribute to globally regulating a wide range of Pi deficiency responses. In this review, recent advances are evaluated in terms of progress toward developing a comprehensive understanding of the molecular events underlying control over P homeostasis. Application of this knowledge, in terms of developing crop plants having enhanced attributes for P use efficiency, is discussed from the perspective of agricultural sustainability in the face of diminishing global P supplies.