摘要
采用盆栽试验,研究了重金属镉(Cd)对花生籽实品质安全性的影响及花生籽实对镉胁迫的响应机制。结果表明:在供试镉处理范围内(≤10mg.kg-1),镉胁迫对花生籽实脂肪和蛋白质含量均有显著影响,但品种间存在差异;花生籽实中的镉含量随外源镉含量的增加而显著增加(P<0.05),且在土壤低镉浓度(≤1mg.kg-1)下籽实更易富集镉;受镉污染的花生籽实,其蛋白质是络合镉的主要营养部位,且其镉含量远高于食品中镉的限量值,而脂肪中镉的含量甚微,因此供试花生籽实不能作为人体植物蛋白来源,但可以作为人体食用油脂来源。
A pot experiment was conducted to study the effects of ≤ 10 mg Cd · kg^-1 on the peanut (Arachis hypogaea) seed quality and related response mechanisms. The results indicated that within the range of test Cd concentrations, Cd stress had significant effects on the seed lipid and protein contents, but the responses differed with varieties. The Cd content in peanut seed increased significantly with increasing exogenous Cd concentration ( P 〈 0.05 ) , and the seed could accumulate Cd more easily when the soil Cd concentration was lower ( ≤ 1 mg · kg^-1 ). For Cdcontaminated peanut seed, its protein was the main allocation location of complex Cd, whose Cd content was significantly higher than the critical value for food, while little Cd content was found in lipid. Therefore, Cd-contaminated peanut seeds could not be used as the plant-protein source for people' s dietary, but could be used as the source of edible lipid.
出处
《生态学杂志》
CAS
CSCD
北大核心
2007年第11期1761-1765,共5页
Chinese Journal of Ecology
基金
沈阳市科技局资助项目(06KJJ71001)
关键词
镉
花生籽实
非蛋白巯基
脯氨酸
响应机制
cadmium
peanut seed
non-protein thiol (NPT)
proline
response mechanism