【摘 要】
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Inorganic phosphate (Pi) is the sole source of phosphorus for plants.It is estimated that Pi is a limiting factor for crop growth and yield in one-third of cultivated soils worldwide.Problems of Pi nutrition may be explained by different factors.First of
【机 构】
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Aix Marseille Univ,CEA,CNRS,BIAM,UMR7265,SAVE (Signalisation pour l’Adaptation des Végétaux à leur E
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Inorganic phosphate (Pi) is the sole source of phosphorus for plants.It is estimated that Pi is a limiting factor for crop growth and yield in one-third of cultivated soils worldwide.Problems of Pi nutrition may be explained by different factors.First of all,Pi has very low mobility in soils leading to the retrieval of the major-ity of the Pi fertilizers applied to be recovered by microorganisms at the expense of the crops.Secondly,it forms insoluble complexes with clays or many soil cations reducing its bioavailability.The maintenance of high crop yields is therefore massively dependent upon Pi fertilizer application even if it is estimated that only 20％ of the Pi applied as a fertilizer is actually used by plants.However,global Pi sources are non-renewable and rapidly depleting [2].In addition,most of the Pi applied to fields is unused by crops,and leaks into the rivers,promoting serious water pollution due to cyanobacteria blooms.Thus,improvement of crop Pi acquisition efficiency is essential for identifying sustainable green solutions and overcoming this challenge.
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