Ca(NO_3)_2对茄子黄萎病抗性及其生理指标和茄子幼苗生长的影响  

Effects of Ca( NO3)2on eggplant resistance to Verticillium wilt,physiological indexes and seedling growth

作　　者：周宝利[1] 蔡莲莲[1] 毕晓华[1] 郑继东[1] 

机构地区：[1]沈阳农业大学园艺学院,沈阳110161

出　　处：《生态学杂志》2014年第8期2148-2152,共5页Chinese Journal of Ecology

基　　金：沈阳市科技计划项目(F10-226-4-00)资助

摘　　要：以茄子黄萎病为研究对象,采用在营养钵中施加不同浓度Ca(NO3)2(80、120、160、200 mg·L-1)的方法,研究了不同浓度Ca(NO3)2对茄子黄萎病抗性、茄子幼苗生长以及生理指标的影响。结果表明:与清水对照相比,不同浓度的Ca(NO3)2均能降低茄子黄萎病的发病率和病情指数,促进茄子幼苗生长,提高相关抗性生理指标;其中Ca(NO3)2的最佳作用浓度为160 mg·L-1;与清水对照相比,茄子幼苗的株高、茎粗、地上鲜重、地下鲜重分别增加了32%、22%、93%和114%,叶绿素含量和根系活力分别提高了35%和63%,相对电导率和丙二醛分别降低了51%和54%,3种防御酶PAL、PPO和POD的活性分别增加了60%、721%和144%。The effects of adding different concentrations （80, 120, 160, 200 mg · L-1） of Ca（NO3）2 on eggplant resistance to Verticillium wilt, eggplant seedling growth and resistance physiology indexes were studied by inoculating eggplant seedlings with V. dahliae. The results showed that, after adding the different concentrations of Ca（ NO3 ） 2, the disease incidence and disease index of eggplant V. wilt were both decreased, the growth of eggplant seedlings was promoted, and the related physiological indexes of resistance were increased. The 160 mg· L-l of Ca（ NOa ）2 had the best effect among all the treatments. Compared with the control （adding water）, the plant height, stem diameter, ground fresh weight, and underground fresh weight after the different additions of Ca（ NO3 ）2 increased by 32% , 22% , 93% and 114% , respectively; the chlorophyll content and root vigor increased by 35% and 63%, respectively; the relative electricity conductivity and MDA decreased by 51% and 54%, respectively; the activities of defensive enzymes （PAL, PPO, POD） increased by 60%, 721% and 144%, respectively.

关 键 词：CA(NO3)2 茄子 黄萎病 

分 类 号：S641.1[农业科学—蔬菜学]