硝基氯苯胁迫对小麦种子萌发和幼苗生长的影响  

Effects of Nitrochlorobenzene-stress on Seed Germination and Growth of Wheat

作　　者：徐应明[1] 戴晓华[1] 孙扬[1] 林大松[1] 

机构地区：[1]农业部环境保护科研监测所,农业部农业环境与农产品安全重点开放实验室,天津300191

出　　处：《灌溉排水学报》2008年第5期1-3,21,共4页Journal of Irrigation and Drainage

基　　金：中央级公益性科研院所基本科研业务费专项(007-ZQW-1);农业部农业行业标准资助项目

摘　　要：在水培条件下,研究了不同浓度4-硝基氯苯和2,4-二硝基氯苯对小麦种子萌发、幼苗生长和生理特性的影响。结果表明,硝基氯苯能明显地抑制小麦种子萌发和幼苗的生长,幼苗干重、鲜重均存在不同程度的下降,受害程度随硝基氯苯浓度的增加而加重,当2,4-二硝基氯苯浓度为2.0 mg/L以上时,小麦种子停止发芽。硝基氯苯胁迫促使小麦过氧化物酶(POD)含量增加,在小麦幼苗受到轻微胁迫时,POD活性会有所提高,增加作物对胁迫的抗性作用;在低浓度下,硝基氯苯对小麦幼苗的伤害还突出地表现为丙二醛(MDA)的高度累积,其对小麦幼苗的伤害主要表现在生长初期。Effects of different concentrations of nitrochlorobenzene such as 4-nitrochlorobenzene and 2,4-di nitrochlorobenzene on seed germination, growth and biological characters of wheat were studied. The re suits showed that seed germination and growth of wheat were refrained when the concentrations of nitro chlorobenzene were more than 1.0 mg/L. The seed germination was stopped by 2.0 mg/L of 2,4-dinitro chlorobenzene. Under 0.5 mg/L different concentrations of nitrochlorobenzene-stress, the activities of per oxidase（POD）and MDA contents of stem leaves increased with increasing nitrochlorobenzene concentra tions. Damaged-level of seed growth was increased along with the increase of nitroehlorobenzene concen trations.

关 键 词：硝基氯苯 小麦 种子萌发 生理特性 伤害 

分 类 号：S512.1[农业科学—作物学]