重金属铬胁迫对油菜生长状况与铬积累的影响

Effects of Heavy Metal Chromium Stress on Rape Growth and Chromium Accumulation

为了探究不同浓度铬(Cr 6+)对油菜生长的影响,以铬污染的土壤为培养基质,通过盆栽实验,测定分析油菜植株的叶表面积、株高、鲜重、叶片鲜重、叶片相对含水率、叶片中铬含量等指标。结果显示:油菜的株高、鲜重、叶表面积、叶片鲜重和叶片中铬浓度随着铬胁迫浓度增加而先增后降,与对照相比,整体呈现增加趋势,其中植株高度和叶表面积在铬浓度为100 mg/kg时,增长最大;植株鲜重、叶片鲜重和叶片中铬的浓度在铬浓度为200 mg/kg时,增长最大;油菜叶片相对含水率总体呈现先降低后增加再降低的趋势,与对照相比整体呈现下降趋势。本文研究结果表明,低浓度的铬能促进植株的生长,但叶片相对含水率并没有增加。

To explore different concentrations of chromium(Cr 6+)on the growth of rape,this study uses chromium contaminated soil as the culture substrate,rape as the research object,and makes pot experiments by measuring and analyzing the leaf surface area,plant height,fresh weight,leaf fresh weight,leaf relative moisture content(RWC)and chromium content in leaves.The results show that the plant height,fresh weight,leaf surface area of rape,fresh weight of rape leaves,chromium concentration in leaves increased first and then decreased with the increase of chromium stress concentration,The plant height and leaf surface area increased the most when the chromium concentration was 100 mg/kg.The plant fresh weight,leaf fresh weight and chromium concentration in the leaves increased the most when the chromium concentration was 200 mg/kg and the leaf moisture content(RWC)of rape showed the trend of first decreasing and then increasing and then decreasing,compared with the control group.It can be seen that low concentration of chromium can promote the growth of plants but does not promote the relative moisture content of plants.