摘要
以砷对小麦种子萌发的影响进行了研究,结果表明:砷浓度≤7.5mgL-1时,对小麦发芽率、芽长的影响不大;砷浓度>7.5mgL-1时,砷浓度与发芽率、芽长呈显著的负相关;砷浓度≥1.0mgL-1时,对根长有显著影响,浓度愈大,抑制愈强。砷对根系活力、α-淀粉酶活性有极显著、显著地抑制作用,对呼吸强度亦有抑制趋势。两种价态砷毒性不同,对形态特征的毒性为As(Ⅲ)>As(Ⅴ),对生理生化特性的毒性为As(Ⅴ)>As(Ⅲ).
Through studying arsenic effect on winter wheat germination,the results obtained are as follows:with a concentration ≤7.5 mg·L -1 ,arsenic has little influence on germination percentage and bud length,but with arsenic concentration >7.5 mg·L -1 ,a significant negative correlation occurs between the arsenic concentration and the germination percentage and bud length;with arsenic concentration ≥1.0 mg·L -1 ,the effect of arsenic on root length has significant influence,and its inhibition will be stronger when the concentration increases.The inhibition of arsenic on root activity and α amylase activity is very significant or significant,and arsenic also has significant inhibition to respiratory intensity.But the toxic actions of contamination of the two different valences arsenic are different:the toxic action of As(Ⅲ) with morphogical peculiarity is larger than that of As(Ⅴ).On the contrary,the toxic action of As(Ⅴ) with physiological biochemical characters is larger than that of As(Ⅲ).
出处
《西北农业大学学报》
CSCD
北大核心
1998年第6期56-60,共5页
Journal of Northwest Sci-Tech University of Agriculture and Forestry(Natural Science Edition)
关键词
砷
小麦
形态特征
生理生化特性
arsenic,winter wheat,morphological peculiarity,physiological biochemical characteristic