Gao Ying, Zhao Kaijun
a National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Science, Chinese Academy of Agriculture Sciences (CAAS) , Beijing , China.
Plant Signal Behav. 2017 Jan 2;12(1):e1271859. doi: 10.1080/15592324.2016.1271859.
Plant chitinases are a group of proteins associated with defense against pathogen attack. BjCHI1 is the first characterized chitinase containing two chitin binding domains (CBDs). Investigations have shown that BjCHI1 inhibits growth of fungal phytopathogens and agglutinates Gram-negative bacteria. Our recent studies revealed that expression of BjCHI1 mRNA is largely induced upon infection of Botrytis cinerea via a R2R3-MYB transcription factor BjMYB1 interacting with a W box-like element (Wbl-4) in the BjCHI1 promoter. The enhanced expression pattern of BjMYB1 was similar to that of BjCHI1 and associated with resistant phenotype against B. cinerea. These findings suggest that BjCHI1 is involved in host defense against fungal attack through interaction with BjMYB1. Here, we review the recent studies on BjCHI1 and propose a model of BjCHI1-mediated plant defense against fungal attack.
植物几丁质酶是一类与抵御病原体攻击相关的蛋白质。BjCHI1是首个被鉴定出含有两个几丁质结合结构域（CBD）的几丁质酶。研究表明，BjCHI1可抑制真菌植物病原体的生长并凝集革兰氏阴性菌。我们最近的研究发现，在灰葡萄孢感染后，BjCHI1 mRNA的表达在很大程度上通过一个R2R3-MYB转录因子BjMYB1与BjCHI1启动子中的一个类W盒元件（Wbl-4）相互作用而被诱导。BjMYB1的增强表达模式与BjCHI1相似，且与对灰葡萄孢的抗性表型相关。这些发现表明，BjCHI1通过与BjMYB1相互作用参与宿主对真菌攻击的防御。在此，我们综述了关于BjCHI1的最新研究，并提出了一个BjCHI1介导的植物对真菌攻击防御的模型。
