KNO_3、K_2SO_4及其混盐胁迫对辣椒幼苗生理生化特性的影响  

Effects of KNO_3,K_2SO_4 and Their Mixed Salt Stress on the Physiological and Biochemical Characteristics of Pepper Seedling

作　　者：姜伟[1,2] 崔世茂[2] 张怡婷[2] 王水霞[2] 王建国[1] 胡栓红[1] 

机构地区：[1]内蒙古农牧业科学院蔬菜研究所,内蒙古呼和浩特010031 [2]内蒙古农业大学农学院,内蒙古呼和浩特010018

出　　处：《华北农学报》2011年第5期164-169,共6页Acta Agriculturae Boreali-Sinica

基　　金：内蒙古农牧业科技创新基金项目(CXJJ-2130100);内蒙古自治区设施园艺产业科技服务体系"内蒙古农业大学-重点实验室"资助

摘　　要：为探讨日光温室土壤主要盐分对作物水分吸收、保护酶、渗透调节物质以及质膜透性的影响,以辣椒品种亮剑为研究试材,比较研究了50,100,150,200 mmol/L的KNO3,K2SO4及其混盐处理对辣椒幼苗茎叶和根系含水量、叶片超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性、脯氨酸(Pro)和可溶性糖渗透调节物含量以及丙二醛(MDA)和渗透电解率质膜透性的影响。结果表明:随着盐处理浓度的增加,辣椒幼苗茎叶和根系水分含量相对于CK呈现出先升后降的趋势,200 mmol/L处理含水量为最低;叶片SOD活性表现为先降后升的趋势,而POD和CAT呈现出降低-升高-降低的趋势;Pro、可溶性糖、MDA含量以及电解渗透率表现为逐渐升高的趋势。综合各项测定指标,K2SO4处理对辣椒幼苗生理生化特性影响程度明显大于混盐和KNO3。The effects of KNO3 ,K2SO4 and their mixed salt stress（0,50,100,150,200 mmol/L） on the physi- ological and biochemical characteristics of pepper （＂ LiangJian＂ named）seedling were investigated. With the increasing concentration of salt, the results showed：shoot and root water content of pepper seedling increasing firstly and then decreasing, leaf SOD activity content first decreasing and then increasing while the POD and CAT showing a decrease-increase-decrease trend,content of Pro, soluble sugar, MDA and EC value showing increasing tendency. The effecting degree of K2SO4on physiological and biochemical characteristics of pepper seedlings was significantly greater than KNO3 and mixing salt.

关 键 词：次生盐渍化 辣椒 生理生化特性 

分 类 号：S641.3[农业科学—蔬菜学]