Phytocystatin在植物抗病虫中的作用及表达调控  

Role and Expression Regulation of Phytocystatin in Plant Resistance to Diseases and Pests

作　　者：余永廷[1] 高春生[1] 李智敏[1] 曾粮斌[1] 陈佳[1] 朱爱国[1] 朱涛涛[1] 孙凯[1] 严准[1] 

机构地区：[1]中国农业科学院麻类研究所,湖南长沙410205

出　　处：《作物杂志》2016年第6期9-15,共7页Crops

基　　金：中国农业科学院科技创新工程"南方经济作物有害生物防控(ASTIP-IBFC09)";农业部部门预算项目"经济作物病虫害发生规律及农药使用情况调查(S158)"

摘　　要：植物半胱氨酸蛋白酶抑制剂(phytocystatin)在抗线虫、草食动物及真菌等生物胁迫中发挥重要作用。在植物受到线虫或草食动物危害时,phytocystatin能直接抑制其体内一种重要的消化酶——半胱氨酸蛋白酶的活性,从而影响这些害虫的生长和繁殖。然而,phytocystatin抑制植物病原真菌的生长却不依赖于其蛋白酶抑制活性,其抑菌潜在机制目前并不清楚。在植物受到生物胁迫时,phytocystain的表达受多种因子调控,与茉莉酸信号密切相关,但其表达调控的详细网络特征需要更多的研究来阐明。本文总结了phytocystatin在植物抗线虫、草食动物及真菌中的研究及应用,分析了其表达调控机制,并对其未来研究趋势及应用前景进行了展望。Plant cysteine proteinase inhibitor, also called phytocystatin, plays a critical role in plant resistance to biotic stress, such as nematode, herbivore and fungi, etc. It can impair their growth and reproduction by directly inhibiting the activity of cysteine proteinase, an important digestive enzyme of nematode or herbivore when they infect plant. However, the impairing function of phytocystatin to some phytopathogenic fungi does not depend on its cysteine proteinase inhibiting activity and its underlying mechanism is still unclear. When plant suffered to biotic stress, expression of phytocystatin is regulated by various genes and is closely related to JA signaling. However, regulation network of phytocystatin expression is unclear and need more studies to reveal. This review summarizes the recent studies highlighting the role and application of phytocystatin in plant resistance to nematode and herbivore, and analyzes the expression regulation mechanism of phytocystatin. In addition, we forecast the research tendency and application prospect of this protein .

关 键 词：半胱氨酸蛋白酶抑制剂 抑菌机理 表达调控 植物 抗病 抗虫 

分 类 号：S432.23[农业科学—植物病理学]