期刊论文

Investigation on tolerance, accumulation and physiological responses of Macleaya cordata to lead

中文

农业现代化研究

1000-0275

2021

42

2

339-348

10.13872/j.1000-0275.2021.0026

国家公益性（环保）行业科研项目（201509037）； 湖南省重点研发计划项目（2018SK2017）； 长沙市科技计划项目（kq1901136）~~；

本校为第一机构

以草本植物博落回(Macleaya cordata)为供试植物,采用沙培盆栽实验研究其对重金属铅(Pb)的耐性、富集及生理响应机制。结果表明:博落回能耐受500 mg/L的Pb胁迫而其生长发育不受影响,高于此浓度时植株生长发育受到抑制。不同组织对Pb的富集能力表现为根>茎>叶,博落回对Pb的富集与转运能力皆随Pb胁迫浓度的升高而减弱。Pb胁迫引起丙二醛(Malondialdehyde, MDA)在植物体内累积。低于500 mg/L的Pb促进叶绿素、可溶性蛋白的合成和抗氧化酶活性的提高,高于此浓度时,则表现为抑制,且导致膜脂过氧化与生物膜的损伤。Pb主要以迁移活性低的化学形态存在于细胞壁和可溶性组分中,浓度升高会导致Pb向迁移毒性...

The mechanisms of herb Macleaya cordata on the tolerance to lead (Pb) were studied via a sand culture experiment. The results showed that the growth of M. cordata was not affected by 500 mg/L Pb but was inhibited by > 500 mg/L Pb. The Pb accumulation and transportation capacity of M. cordata decreased with the increasing Pb concentrations. The exposure of Pb caused the accumulation of malondialdehyde (MDA) in plants, but < 500 mg/L Pb promoted the synthesis of chlorophyll and soluble protein and the activity of antioxidant enzymes, which were inhibited when the Pb concentration was higher than...