苦槛蓝总黄酮含量测定及其提取工艺研究

以芦丁为标准品,建立了紫外分光光度法测定苦槛蓝黄酮含量的方法,通过单因素与正交实验研究了苦槛蓝叶中黄酮的提取工艺。结果表明,采用AlCl3显色法适合苦槛蓝黄酮含量的测定,其稳定性、精密度、回收率的相对标准偏差RSD(relative standard deviation)分别为0.506%、1.30%、4.20%。影响苦槛蓝黄酮得率的主次因素为:温度>乙醇体积分数>提取时间>料液比,最佳提取工艺条件为:25倍量的60%的乙醇,在温度为90℃的条件下,提取2.0 h,提取3次,苦槛蓝总黄酮平均收率为5.16%。

Plant immune inducer ZNC promotes rutin accumulation and enhances resistance to Botrytis cinerea in tomato

Gray mold is a destructive disease caused by Botrytis cinerea,a pervasive plant pathogen,which poses a threat to both tomato growth and postharvest storage.The utilization of induced resistance presents a potential strategy for combating plant pathogenic attacks.ZNC(zhinengcong),an extract derived from the endophytic fungus Paecilo-myces variotii,has been discovered to play a vital role in preventing diverse forms of bacterial infections.Nevertheless,the precise mechanism behind its ability to enhance tomato resistance to fungi remains unclear.In this study,we found that the exogenous spraying of ZNC could significantly improve the resistance of tomato plants to B.cinerea.The results of both the metabolomic analysis and high-performance liquid chromatography(HPLC)demonstrated that tomato plants responded to ZNC treatment by accumulating high levels of rutin.Additional transcriptome analysis uncovered that rutin enhances tomato resistance possible by initiating the generation of reactive oxygen species(ROS)and phosphorylation of mitogen-activated protein kinases(MPKs)related genes expression during the initial phase of invasion by B.cinerea.In addition,we also found that rutin might activate plant immunity by eliciting ethylene(ET)and jasmonic acid(JA)-mediated pathways.Therefore,plant immune inducer ZNC and rutin has bright application prospects and high utilization value to control gray mold.