期刊
BIOLOGIA PLANTARUM
卷 59, 期 1, 页码 163-170出版社
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1007/s10535-014-0476-8
关键词
ascorbate peroxidase; carotenoids; catalase; chlorophyll; hydrogen peroxide; Lolium perenne; malondialdehyde; peroxidase; superoxide dismutase
资金
- Shandong Provincial Natural Science Foundation of China [ZR2013CM003]
- Project of Shandong Province Higher Educational Science and Technology Program [J14LF08]
Hydroponics experiments were conducted to study the effects of sodium nitroprusside (SNP, a donor of NO) on lead toxicity in ryegrass (Lolium perenne L.) seedlings. When the ryegrass seedlings were grown in a nutrient solution containing 500 mu M Pb2+ for two weeks, the plant biomass as well as net photosynthetic rate, transpiration rate, chlorophyll and carotenoid content of leaves decreased. The Pb stress also induced the production of superoxide anion (O-2 (center dot-)) and hydrogen peroxide (H2O2), leading to malondialdehyde (MDA) accumulation. Furthermore, the activities of superoxide dismutase (SOD), peroxidase (POD), and ascorbate peroxidase (APX) decreased in the Pb-treated seedlings, but the catalase (CAT) activity increased. Additionally, the content of Cu in shoots and the content of K, Mg, Fe, and Zn in both shoots and roots decreased, but the content of Ca in shoots and roots increased under the Pb stress. Moreover, Pb accumulated mostly in roots, whereas a small quantity was translocated to shoots. However, the addition of 50, 100, and 200 mu M SNP into the solution containing Pb increased the chlorophyll content and net photosynthetic rate, reduced Pb-induced oxidative damages, improved antioxidant enzyme activities, and inhibited translocation of Pb from roots to shoots. In particular, 100 mu M SNP had the best effect on promoting growth of the ryegrass seedlings under the Pb toxicity. However, the application of 400 mu M SNP had no obvious alleviating effect on Pb toxicity in the ryegrass seedlings.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据