植物病原细菌Harpin类蛋白简介

The Brief Introduction of Harpin Proteins

Harpin类蛋白是广泛存在于革兰氏阴性植物病原细菌中的一类蛋白质,它们具有相似的生化特性:富含甘氨酸(Gly)、缺少半胱氨酸(Cy)s、热稳定、对蛋白酶敏感等。它们的编码基因大多位于hrp基因簇,其决定寄主植物上的致病性和非寄主植物上的过敏性反应(HR,hypersensitive response)。本文简述了目前已知的Harpin蛋白、其在植物细胞上的作用位点以及涉及的信号途径。Harpin类蛋白不仅能够诱导植物的抗病、抗虫性,还具有促进植物生长和抗逆性的功能,因此其作为生物农药具有广泛的应用前景。

Harpin proteins widely occurring in many Gram-negative phytopathogens have some similar characteristics such as richness of glycine, lack of cysteine, heat-stable and protease-sensitive. The genes encoding harpins were often located in the hrp gene cluster, which are critical for pathogenicity in host plants and hypersensitive response （HR） in nonhost plants. In this review, we summarize some harpins known today and the banding sites of harpins in plant cell as well as different signaling pathways involved. Not only are anti-disease and anti-pest of plant induced by harpins, but also the growth of plant are promoted and the ability of anti-adversity of plant are increased by harpins. Therefore, harpins as biological pesticides have wide prospects in agriculture applications.