Molecular regulation network of phosphorus starvation signaling and genetic improvement of phosphorus efficiency in plants
Phosphorus(P),one non-renewable resource,is an essential macroelement for plant growth and development.Its easy fixation and slow movement in soil result in low bioavailability in most farmland,thus seriously affecting crop yield and quality.In an agricultural production system,the problem of low P availability in soil is solved mainly by applying extra P-fertilizers.However,due to the physical and chemical properties of P in soil,about 85％-90％of P-fertilizers applied to the soil will change into other forms that cannot be used by plants.The retention of a large number of P-fertilizers in soil not only causes the waste of P resources,but also intensifies the decline of soil fertility and causes environmental problems such as water eutrophication.Therefore,how to fully explore and improve the biological potential of P-absorption and-utilization of crops and reduce the application of P-fertilizers are the hot and difficult topics in the field of plant nutrition.In this article,the molecular regulatory network of P-signaling and-balancing in plants and the genetic improvement of P-efficient crops in recent years were reviewed.The key points of P nutrient research in the future have been prospected,and the potential models for genetic improvement of P efficiency in crops are proposed.
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