植物低磷胁迫信号转导与适应性反应研究进展

磷是植物生长发育所必须的大量元素之一,据调查世界范围内大量耕地有效磷缺乏,植物生长发育和作物产量因此受到限制。在长期进化过程中,耐低磷植物在早期响应基因(主要与低磷信号感受和转导有关)和后期响应基因(主要与形态、生理生化和代谢有关)的协同作用下形成了多种低磷适应机制。从低磷信号的感受和转导,形态、生理生化和代谢适应性机制方面综述了目前植物耐低磷方面的研究进展。以期为植物低磷信号转导和适应机制研究及耐低磷作物品种的培育提供依据。

Research Progress on Signaling Pathway and Adaptive Response under Phosphorus Deficiency Stress in Plants

Phosphorus is one of essential macronutrients required for plant growth and development,but the soluble inorganic phosphate is deficient in 40%~60% of the world’s arable lands.Therefore the plant growth and crop yield are limited.During the long evolution process,plants have developed many strategies to response to Pi deficiency under the synergies between ’early’ genes and ’late’ genes.The ’early’ genes respond rapidly and are involved in sensing Pi deficiency and transducing information and the ’late’ genes regarding the morphological,physiological or metabolic alternations can improve the Pi acquisition,transportation and cyclic utilization efficiency.Aiming at further understanding how plants response and adapt to Pi deficiency and develop new crops with high tolerance to Pi deficiency,this paper expounds the research progress on plant tolerance to phosphorus deficiency from early signaling events,and late morphological,physiological and metabolism adaptations mechanism,so as to provide scientific basis for developing crop varieties tolerant to Pi deficiency.