Advances in genetic regulation mechanism of plant tolerance to phosphorus deficiency
Although very high total phosphorus (P) content in soils,the soil available P for plants is often very low.Hence,lack of available P in soils has been one of the limitation factors in agricultural production.Because of important roles for P in plant growth and development,a series of mechanisms are involved in plant adaptation in response to low P stress.The wide usage of molecular biological technology in the research of plant nutrition leads to the discovery of a number of genes involved in plant P homeostasis,such as P transporters,transcriptional factors,non-coding RNA,P-starvation-induced (PSI) genes.These genes interact with each other to form a complex network for genetic regulation in plant tolerance to low P stress.Moreover,quantitative trait locus (QTL) analysis is often used to detect genetic loci controlling plant P efficiency in different species.All of these results can be used to understand genetic mechanism in plant tolerance to P deficiency.This paper makes a brief review on advances in genetic regulation of plant tolerance to low P stress.