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Judul: Responses of Phosphate Deprivation on Plant Growth and Development
Penulis: J. Effendy  || email:
Jurnal: Budidaya Pertanian Vol. 4 no. 2 - hal. 73-83 Tahun 2008  [ Pertanian ]
Keywords:  Phosphorus deprivation, Pi homeostasis, plant growth, gene expression
Abstract: Phosphorus (P) is limiting for crop yield on > 30% of the world's arable land and, by some estimates, world resources of inexpensive P may be depleted by 2050. However, Pi is the least accessible macro-nutrient in many ecosystems and its low availability often limits plant growth. Phosphate (Pi) plays a central role as reactant and effector molecule in plant cell metabolism. Plants have evolved a diverse array of strategies to obtain adequate P under limiting conditions, including modifications to root architecture, carbon metabolism and membrane structure, exudation of low molecular weight organic acids, protons and enzymes, and enhanced expression of the numerous genes involved in low-P adaptation. Although physiological responses to Pi starvation have been increasingly studied and understood, the initial molecular events that monitor and transmit information on external and internal Pi status remain to be elucidated in plants. This review summarizes molecular and developmental Pi starvation responses of higher plants and the evidence for coordinated regulation of gene expression for significant advances in our understanding of the complex mechanisms by which plants regulate Pi-starvation responses.
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