植物磷获取机制及其对全球变化的响应

Plant phosphorus acquisition mechanisms and their response to global climate changes

磷是植物生长的必需元素,而陆地生态系统普遍存在磷限制,全球变化可能会影响土壤磷循环过程,进一步加剧磷限制,探讨植物磷获取策略对科学预测生态系统生产力如何适应全球变化具有重要意义。该文通过收集和梳理相关文献,从4个方面综述植物的磷获取机制及其对全球变化的响应:1)植物的磷饥饿响应机制;2)植物的磷获取途径和策略;3)土壤微生物对植物磷吸收的影响;4)植物磷吸收对全球变化(温度升高、氮沉降和降水变化)的响应及其机制。该综述有助于深入理解全球变化背景下植物适应低磷胁迫的机理,也可为养分资源管理实践提供理论依据。

Phosphorus(P)is an essential but limited nutrient for plant growth,and global climate changes may affect soil P cycling and further aggravate P limitations in the soil.In this review,we focused on the response of plant P acquisition strategies to climate changes and subsequent influences on ecosystem productivity.By searching and analyzing the existing literatures,we summarized the P acquisition mechanism of plants and their response to global climate changes from following aspects:1)plant P starvation response mechanisms;2)plant P acquisition pathways and strategies;3)involvements of soil microorganisms in plant P utilization;and 4)responses of plant P acquisition strategies to global climate changes(e.g.,warming,nitrogen deposition and precipitation changes)and the underlying mechanisms.The review is expected to deepen our understanding of plant adaptation to low-P stress under the future climate scenario,and can also provide a theoretical basis for nutrient management in agriculture.