重金属镉在五类花生不同部位的分布特征及其对产量的影响

Effects of Cd Stress on Distribution Characteristics at Different Parts of Five Peanut Genotypes and their Yields

采用盆栽实验,研究了重金属镉胁迫下五类花生中镉在不同部位的分布特征及其对产量的影响。结果表明,随镉处理水平增加,花生根部镉含量表现为先增后减,各水平间镉的含量均具有显著差异(P<0.05);花生籽实中镉的含量随镉处理浓度的增加也显著增加(P<0.05),其中品种KA100和KB054籽实中镉含量和变化均相对较小。不同镉处理水平下,花生各部位镉含量分布特征不同,随着镉污染浓度增大,镉在花生作物中渐渐向叶茎积累,而并非积累于根部。随镉处理水平增加,花生产量表现出先增后减的趋势。品种KB054受镉影响较弱,表现出较强的镉耐受性。

A pot experiment was conducted to study the distribution and accumulation of cadmium in five genotypes peanut（Arachis hypogaea）under different Cd concentration stress. The results showed that with the increasing of Cd treatment levels, the Cd contents in peanut root increased first, then decreased. The Cd contents between various Cd treatment levels were significantly different （ P 〈 0.05 ）. The Cd content in peanut seeds increased with the increasing of Cd concentration level（P 〈 0.05）. But in seeds of both KA100 and KB054, Cd accumulation and their variable were relatively low. Under different Cd levels, the distribution characteristics were different at different peanut parts. With the increasing Cd contamination, Cd contents inside of peanut were gradually accumulated at leaves and stalks, rather than roots. With the increase of Cd treatment level, peanut yield was first increased, then decreased. Variety KB054 was weakly affected by Cd, showing strong Cd tolerance.