Feeding hungry plants: The role of purple acid phosphatases in phosphate nutrition

被引：199
作者：
Tran, Hue T. [1 ]
Hurley, Brenden A. [2 ]
Plaxton, William C. [1 ,3 ]
机构：
[1] Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada
[2] Univ Toronto, Dept Cell & Syst Biol, Toronto, ON M5S 3B2, Canada
[3] Queens Univ, Dept Biochem, Kingston, ON K7L 3N6, Canada
来源：
PLANT SCIENCE | 2010年 / 179卷 / 1-2期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Arabidopsis; Purple acid phosphatase; Genetic redundancy; Phosphate starvation response; Phosphate metabolism (scavenging and recycling); ARABIDOPSIS-THALIANA; SUSPENSION CELLS; GENE-EXPRESSION; TRANSLATION INITIATION; TRANSCRIPTION FACTOR; PROTEOMIC ANALYSIS; ROOT DEVELOPMENT; PHYTASE ACTIVITY; PHOSPHOENOLPYRUVATE PHOSPHATASE; MOLECULAR CHARACTERIZATION;
D O I：
10.1016/j.plantsci.2010.04.005
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Phosphate (Pi) is an essential, but limiting macronutrient that plays critical roles in plant metabolism and development. Plants have evolved an intricate array of adaptations to enhance Pi acquisition and utilization from their environment. The availability of the complete genome sequence of the model plant Arabidopsis thaliana, together with a wide assortment of related genomic resources, has significantly advanced our understanding of the adaptations of Pi-starved plants. Information on the genetic identity, subcellular location, biochemical properties, and probable functions of acid phosphatases involved in the Pi metabolism of Pi-starved Arabidopsis is beginning to emerge. Acid phosphatases catalyze the hydrolysis of Pi from a broad range of phosphomonoesters with an acidic pH optimum. The Arabidopsis genome encodes 29 different purple acid phosphatases whose expression is influenced by various developmental and environmental factors. Pi starvation induces de novo synthesis of several extra and intracellular Arabidopsis purple acid phosphatase isozymes: AtPAP12 and AtPAP26 appear to be the principal root-secreted acid phosphatases that scavenge Pi from extracellular Pi-esters, whereas the dual-targeted AtPAP26 is the predominant intracellular acid phosphatase that functions in vacuolar Pi recycling by Pi-starved Arabidopsis. The identification and functional characterization of intracellular and secreted purple acid phosphatase isozymes upregulated by Pi-deprived plants may help develop strategies for engineering Pi-efficient crops, thereby minimizing the use of unsustainable Pi fertilizers in agriculture. (C) 2010 Elsevier Ireland Ltd. All rights reserved.
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收藏
页码：14 / 27
页数：14
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