镉胁迫对海菜花种子萌发及幼苗初期生理生化的影响

发布时间：2018-12-18 17:08

【摘要】：通过营养液培养法,研究Cd~(2+)对海菜花种子萌发及幼苗初期叶绿素含量、抗氧化酶活性及可溶性蛋白质含量的影响。结果表明,各浓度(0.1~2.0 mg/L)Cd~(2+)处理抑制海菜花种子的萌发,但与对照无显著差异(P0.05);海菜花种子的发芽势、发芽指数、活力指数整体随Cd~(2+)处理浓度的增大而下降,当Cd~(2+)处理浓度较高时,与对照差异显著(P0.05)。Cd~(2+)胁迫明显降低海菜花叶片中叶绿素a、叶绿素b、类胡萝卜素含量,且与对照差异显著(P0.05)。随着Cd~(2+)浓度增大,超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、可溶性蛋白质含量先升高后降低;过氧化氢酶(CAT)活性呈持续降低趋势,且与对照差异显著(P0.05)。随Cd~(2+)胁迫浓度增大,其对海菜花的毒害作用增强。
[Abstract]:The effects of Cd~ (2) on seed germination, chlorophyll content, antioxidant enzyme activity and soluble protein content in the early stage of Seedling were studied by nutrient solution culture method. The results showed that the germination of Seaflower seeds was inhibited by Cd~ (0. 1 0. 0 mg/L) Cd~ (2), but there was no significant difference compared with the control (P0.05). The germination potential, germination index and vigor index of the seeds decreased with the increase of the concentration of Cd~ (2). When the concentration of Cd~ (2) was higher, the germination potential, germination index and vigor index of the seeds decreased with the increase of the concentration of Cd~ (2). Cd~ (2) stress significantly decreased the content of chlorophyll a, chlorophyll b and carotenoid in the leaves of cauliflower, and the difference was significant compared with the control (P0.05). With the increase of Cd~ (2) concentration, the activity of superoxide dismutase (SOD), the activity of peroxidase (POD) and the content of soluble protein increased firstly and then decreased. The activity of catalase (CAT) decreased continuously, and the difference was significant (P0.05). The toxicity of Cd~ (2) to cauliflower increased with the increase of Cd~ (2) stress concentration.
【作者单位】：贵州大学资源与环境工程学院;贵州省土壤肥料研究所;宜宾职业技术学院校企合作办公室;贵州民族大学化学与环境科学学院;
【基金】：贵州省科学技术基金(编号:黔科合J字[2012]2104)
【分类号】：X503.231

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