Abstract: The research of plant and its low-phosphorus environment has been attached importance since the finding in the 1970s that there was a marked increase of P availability in the rhizosphere of crops having adapted to low phosphorus environment. How plant adapts to low-phosphorus environment and makes effective use of soil phosphorus has become a hotspot both at home and abroad. Many researches indicate d that under low-phosphorus environment,plant root could make an adaptive change in morphology, and the matter allocation was inclined to root, inducing an increase of root/shoot ratio.The change of pH in rhizosphere, the exudation of organic acids, and the release of phosphatase were all beneficial to the activation and utilization of soil phosphorus. Different plant species or variety had different P-nutritional efficiency genotype, P-transporter system, and P-activation mechanism.The research on how plant adapts to low-phosphorus environment will be further continued,and it is of realistic significance for economy and environment protection to unveil the countermeasures of plant response to low-phosphorus environment, and to explore the potentialities of plant in making effective use of soil phosphorus.

Key words: Transgenic plant, Biodiversity, Agroecosystem