Physiological Mechanism for Anthocyanins to Strengthen the Drought Tolerance of Plants  

花色苷强化植物耐旱性的生理机制（英文）

作　　者：唐小华[1] 赵昶灵[1,2] 文国松[1,2] 王文亚[1] 王崇德[3] 孙艳[1] 白雪嵩 

机构地区：[1]云南农业大学农学与生物技术学院,云南昆明650201 [2]云南农业大学特色资源植物改良与利用研究所,云南昆明650201 [3]云南农业大学植物保护学院,云南昆明650201

出　　处：《Agricultural Science & Technology》2014年第11期1935-1941,共7页农业科学与技术（英文版）

基　　金：Supported by the National Natural Science Foundation of China(31060045,31260091)~~

摘　　要：This paper summarized the possible physiological mechanism by which anthocyanins strengthen the tolerance of plants to drought. Drought stress can in-duce plant cel s to synthesize and accumulate anthocyanins. The photochemical properties, subcel ular accumulation sites and spatial distributions in plant organs and tissues of anthocyanins determine their function of strengthening plant tolerance, which is realized by three possible physiological mechanisms： （1） anthocyanins and their chelated metal ions can optimize the osmoregulation ability of the plant cel s by directly acting as the osmoregulation substances of the cel s, （2） anthocyanins with suitable spatial locations can reduce the photoinhibition of the plants under drought stresses, （3） anthocyanins can effectively maintain and improve the active oxygen-scavenging capacity of the plant cel s under drought conditions. Therein, that the anthocyanins enhance the antioxidant capacity of the plant cel s under drought stresses is probably the main reason for the anthocyanins to strengthen the drought tolerance of plants. This review could provide a reference for the mechanism re-search of the drought resistance and the breeding of the drought-resistant cultivars for the plants holding the ability to synthesize and accumulate anthocyanins.综述了花色苷提高植物耐旱性的可能生理机制。干旱胁迫可诱导植物细胞合成和积累花色苷。花色苷的光化学性质、亚细胞积累位点及其在植物器官、组织中的空间分布决定了花色苷能强化植物的耐旱性,其生理机制可能涉及3个方面,即:花色苷本身及其螯合的金属离子可直接通过充当植物细胞的渗透调节物质而优化细胞的渗透调节能力;恰当空间定位的花色苷能减轻植物在干旱胁迫下的光抑制、花色苷可有效维持并强化植物细胞在干旱条件下的活性氧清除能力。其中,花色苷提高植物细胞在干旱胁迫下的抗氧化能力可能是花色苷强化植物耐旱性的主要原因。该研究可为具花色苷合成和积累能力植物的抗旱机理探究和抗旱品种的培育提供参考。

关 键 词：Anthocyanins  Strengthen  Plant drought tolerance  Physiological mech-anism 

分 类 号：Q945.78[生物学—植物学]