华北农学报 ›› 2009, Vol. 24 ›› Issue (2): 144-148. doi: 10.7668/hbnxb.2009.02.030

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镉胁迫对莴苣种子萌发及抗氧化酶系统的影响

任艳芳, 何俊瑜, 罗辛灵, 黄天兴   

  1. 贵州大学 农学院, 贵州 贵阳 550025
  • 收稿日期:2008-12-16 出版日期:2009-04-28
  • 通讯作者: 何俊瑜( 1975- ), 男, 山西河曲人, 副教授, 理学博士, 主要从事环境生理生态及农产品安全方面的研究。
  • 作者简介:任艳芳( 1976- ), 女, 山西太原人, 副教授, 理学博士, 主要从事植物生理和分子生物学方向的研究.
  • 基金资助:
    贵州省自然科学基金(20072058;20072053);贵州大学人才基金(X060037)

Effect of Cd Stress on Seed Germination and Antioxidant Enzymes of Lettuce

REN Yan-fang, HE Jun-yu, LUO Xin-ling, HUANG Tian-xing   

  1. College of Agronomy, Guizhou University, Guiyang 550025, China
  • Received:2008-12-16 Published:2009-04-28

摘要: 以笋王一号莴苣为试验材料,研究了不同浓度Cd胁迫对莴苣种子萌发、胚根胚芽生长、丙二醛(MDA)及抗氧化酶系统的影响.结果表明:随着Cd浓度的增加,莴苣种子的发芽率逐渐降低,而Cd对种子的发芽势、发芽指数和活力指数以及胚根的伸长则表现出低促高抑的效应.Cd对胚根生长的抑制程度较胚芽明显.随着Cd浓度的增加.胚根中MDA含量、SOD、G-POD活性明显增加,APX和CAT活性则明显降低,而胚芽中只在高浓度Cd胁迫下(100μmol/L)才发生明显变化.

关键词: 镉, 莴苣, 萌发, 抗氧化酶

Abstract: The effects of different Cadmium(Cd) concentration on seed germination,the growth of radicle and plumula,melondialodehyde (MDA) and the activities of antioxidant enzymes were investigated. The results showed germination rate decreased with the increasing of Cd concentration. Germination potential,germination index,vigour index and the length of radicle were promoted at lower Cd concentration and inhibited at higher Cd concentration. Moverover,Cd had more inhibition effects on radicle growth than plumula.The content of MDA and activities of SOD and G- POD in radicle increased significantly with the increasing of Cd concentration,whereas,the activities of APX and CAT decreased markedly.The content of MDA and the activities of SOD,G- POD,APX,CAT did not change significantly except at the higher Cd concentration (100μmol/L).

Key words: Cd stress, Lettuce, Germination, Antioxidant enzymes

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引用本文

任艳芳, 何俊瑜, 罗辛灵, 黄天兴. 镉胁迫对莴苣种子萌发及抗氧化酶系统的影响[J]. 华北农学报, 2009, 24(2): 144-148. doi: 10.7668/hbnxb.2009.02.030.

REN Yan-fang, HE Jun-yu, LUO Xin-ling, HUANG Tian-xing. Effect of Cd Stress on Seed Germination and Antioxidant Enzymes of Lettuce[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2009, 24(2): 144-148. doi: 10.7668/hbnxb.2009.02.030.

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