无机盐种类与用量对AMEP蛋白表达水平的影响
2021-10-03万恒东岳文涛赵锋商宪富陈道文王思文孙明超刘权
万恒东 岳文涛 赵锋 商宪富 陈道文 王思文 孙明超 刘权


摘 要:AMEP蛋白是从枯草芽孢杆菌中分离鉴定出来的一种新型蛋白激发子,能够诱导植物防卫反应并提高植物的抗病性,是生物农药的理想候选。在前期的研究中发现,培养基中的无机盐对AMEP蛋白表达水平有很大影响。为了最大限度地提高AMEP蛋白的产量,通过在AMEP蛋白的发酵培养基中添加多种无机盐,研究不同种类的无机盐对AMEP蛋白表达水平的影响。结果表明,磷酸钙和磷酸氢二钠能显著提高AMEP蛋白的表达水平,而氯化钠、氯化钙、硫酸锌则显著降低了AMEP蛋白的表达水平。当磷酸钙用量为2g/L时,AMEP蛋白表达产量最高。
关键词:AMEP;无机盐;蛋白产量;磷酸钙;氯化钠
中图分类号 Q936 文献标识码 A文章编号 1007-7731(2021)18-0024-03
Effects of Inorganic Salts on the Expression of AMEP Protein
WAN Hendong1 et al.
(1Heilongjiang Bayi Agricultural University, Daqing163300, China)
Abstract: AMEP protein is a new Protein Elicitor isolated from Bacillus subtilis. It can induce plant defense response and improve plant disease resistance. It is an ideal candidate for new biological pesticides. In the previous study, it was found that the inorganic salts in the medium had a great influence on the expression level of AMEP protein. In order to maximize the production of AMEP protein, the effects of different inorganic salts on the expression of AMEP protein were determined by adding a variety of inorganic salts to the culture medium of AMEP protein. The results showed that calcium phosphate and disodium hydrogen phosphate significantly increased the expression level of AMEP protein, while sodium chloride, calcium chloride and zinc sulfate significantly decreased the expression level of AMEP protein. It was found that the expression yield of AMEP protein was the highest when the dosage of calcium phosphate was 2g/L.
Key words: AMEP; Inorganic salt; Protein yield; Calcium phosphate; Sodium chloride
在我國,常采用施用化学农药的方式来防治农作物病害,以保障农作物的产量与质量。然而,大量施用化学农药不仅会破坏耕种土地的土壤生态环境,而且有害生物的抗药性也会因此而增强[1-2],因此近年来生物农药的研究逐渐成为热点。蛋白激发子是来自于微生物的一类蛋白质,可与植物细胞表面相应的受体特异性结合,诱导植物发生防卫反应[3],提高植物的抗病能力,被视为生物农药的理想候选。
AMEP蛋白是从芽孢杆菌中分离出来的一种新型蛋白激发子,包含76个氨基酸残基,其相对分子质量为8.36kDa[4]。现有研究表明,AMEP蛋白可以与植物相互作用并引起一系列的防卫反应,该蛋白兼具拮抗植物病原菌和杀伤有害昆虫的功能[5-6],可将其用于生物防治来保障植物的健康生长,是蛋白类生物农药的理想材料[7]。……
