›› 2016, Vol. 45 ›› Issue (03): 207-211.DOI: 10.3969/j.issn.1009-7791.2016.03.002

• Plant physiology, biochemistry and molecular biology • Previous Articles     Next Articles

Effects of Cadmium Stress on the Physiological Characteristics of Echinochloa crusgalli

CHEN Wei,JIN Chen-zhong,WU Xiao-feng,BAI Lian-yang,PENG Qiong   

  1. (1.Collaborative Innovation Center for Farmland Weeds Control, Hunan University of Humanities, Science and Technology, Loudi 417002, Hunan China; 2.Hunan Academy of Agricultural Sciences, Changsha 410125, Hunan China)
  • Received:2016-05-20 Revised:2016-10-12 Online:2016-09-10 Published:2016-09-10
  • Contact: BAI Lian-yang; PENG Qiong

不同浓度镉胁迫对稗草生理特性的影响

陈维,金晨钟,吴晓峰,柏连阳,彭琼   

  1. (1.湖南人文科技学院农田杂草防控技术与应用协同创新中心,湖南 娄底 417002;2.湖南省农业科学院,湖南 长沙 410125)
  • 通讯作者: 柏连阳、彭琼
  • 作者简介:陈维,硕士研究生,从事农田杂草研究。
  • 基金资助:
    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)

Abstract: The physiological properties under different Cd2+ concentrations (0, 0.3, 0.6, 0.9, 1.5, 3.0 and 6.0 mg穔g-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穔g-1 Cd2+ stress, and 0.6, 0.9 mg穔g-1 of Cd2+ stress inhibited photosynthesis, but promoted the antioxidant enzyme activities and MDA content. In tillering stage, antioxidant enzyme activities was improved under 3.0 mg穔g-1 Cd2+ stress, and MDA content increased under 6.0 mg穔g-1 Cd2+ stress. In heading stage, the photosynthesis was inhibited under 0.6 mg穔g-1 and 6.0 mg穔g-1 Cd2+ 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.

Key words: barnyard grass, cadmium stress, chlorophyll, antioxidant

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 Cd2+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 Cd2+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 Cd2+胁迫提高稗草分蘖期的抗氧化酶活性;6.0 mg·kg-1 Cd2+胁迫增加稗草分蘖期MDA含量。Cd2+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。

关键词: 稗草, 镉胁迫, 叶绿素, 抗氧化

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