摘要
通过室外盆栽法研究不同浓度镉(Cd)对稗草Echinochloa crusgalli生理特性的影响。结果表明,0.3 mg·kg^(-1)Cd^(2+)胁迫增强稗草分蘖期的光合作用及抗氧化酶活性;但0.6、0.9 mg·kg^(-1)Cd^(2+)胁迫抑制分蘖期稗草的光合作用,增强抗氧化酶活性以及提高MDA含量;3.0 mg·kg^(-1)Cd^(2+)胁迫提高稗草分蘖期的抗氧化酶活性;6.0 mg·kg^(-1)Cd^(2+)胁迫增加稗草分蘖期MDA含量。Cd^(2+)浓度为0.6、6.0 mg·kg^(-1)将抑制稗草抽穗期的光合作用,高浓度镉胁迫抑制稗草抽穗期的抗氧化酶活性。不同浓度镉胁迫下,稗草的脯氨酸含量较高,表现出较高的抗逆能力。
The physiological properties under different Cd^2＋ concentrations （0, 0.3, 0.6, 0.9, 1.5, 3.0 and 6.0 mg·kg^-1） were investigated for the potential use of Echinochloa crusgalli as a candidate for phytoremediation of Cd-contaminated soils. In tillering stage, the photosynthesis and antioxidant enzyme activities were increased under 0.3 mg·kg^-1 Cd^2＋ stress, and 0.6, 0.9 mg·kg^-1 of Cd^2＋ stress inhibited photosynthesis, but promoted the antioxidant enzyme activities and MDA content. In tillering stage, antioxidant enzyme activities was improved under 3.0 mg·kg^-1 Cd^2＋ stress, and MDA content increased under 6.0 mg·kg^-1 Cd^2＋ stress. In heading stage, the photosynthesis was inhibited under 0.6 mg·kg^-1 and 6.0 mg·kg^-1 Cd^2＋ stress, and the antioxidant enzyme activities were also inhibited under high Cd stress. The proline content was increased under Cd stress, showing the higher resistance of Cd stress.
出处
《亚热带植物科学》
2016年第3期207-211,共5页
Subtropical Plant Science
基金
湖南省农业科学院农田杂草安全高效防控创新团队项目(2014TD01)
关键词
稗草
镉胁迫
叶绿素
抗氧化
barnyard grass
cadmium stress
chlorophyll
antioxidant
作者简介
陈维，硕士研究生，从事农田杂草研究。E-mail：3621086618@qq．com
柏连阳为通讯作者。E-mail：bailianyang2005@aliyun．com；
彭琼为通讯作者。E-mail：183749137@qq．com
