镉胁迫下两种高羊茅的生理指标应激反应
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摘要
以来自加拿大的两种高羊茅(Festuca arundinacea)为材料,在温室盆栽的条件下,研究和比较了不同浓度的二价镉(Cd~(2+))对两种高羊茅的脂质过氧化程度、保护酶活性和渗透调节物质的影响。结果表明,与护坡型的高羊茅红象品种相比,在不同程度Cd~(2+)胁迫下,草坪型的高羊茅艾瑞品种表现出了更低的脂质过氧化水平、更强的抗氧化保护酶活性和更具适应性的渗透调节水平,说明高羊茅艾瑞品种对Cd~(2+)的胁迫具有更好的适应性,修复被重金属污染土壤的能力更强。
Two kinds of tall fescue(Festuca arundinacea) from Canada were used as materials to study and compare the effects of different concentrations of cadmium(Cd~(2+)) on lipid peroxidation, protective enzyme activity and osmotic regulators of two kinds of tall fescue in greenhouse. The results showed that, under different concentrations of Cd~(2+) stress,turf-type tall fescue cultivar showed lower lipid peroxidation level, stronger antioxidant protective enzyme activity and more adaptive osmotic regulation level than slope-protected tall fescue cultivar. It was concluded that,turf-type tall fescue cultivar had better adaptability to Cd~(2+) stress and stronger ability to repair the soil polluted by heavy metals.
Two kinds of tall fescue(Festuca arundinacea) from Canada were used as materials to study and compare the effects of different concentrations of cadmium(Cd~(2+)) on lipid peroxidation, protective enzyme activity and osmotic regulators of two kinds of tall fescue in greenhouse. The results showed that, under different concentrations of Cd~(2+) stress,turf-type tall fescue cultivar showed lower lipid peroxidation level, stronger antioxidant protective enzyme activity and more adaptive osmotic regulation level than slope-protected tall fescue cultivar. It was concluded that,turf-type tall fescue cultivar had better adaptability to Cd~(2+) stress and stronger ability to repair the soil polluted by heavy metals.
引文
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[2]刘爱荣,张远兵,张雪梅,等.空心莲子草水浸液对黑麦草和高羊茅种子发芽和幼苗生长的影响[J].草业学报,2007,16(5):96-101.
[3]张远兵,刘爱荣,方蓉.外源一氧化氮对镉胁迫下黑麦草生长和抗氧化酶活性的影响[J].草业学报,2008,17(4):57-64.
[4] HEATH R L,PACKER L. Photoperoxidation in isolated chloroplasts I. Kinetics and stoichiometry of fatty acid peroxidation[J].Arch Biochem Biophy,1968,125(1):189-198.
[5] HODGES D M,DELONG J M,FORNEY C F,et al. Improving the thiobarbituric acid reactive substances assay for estimating lipid peroxidation in plant containing anthocynin and other interfering compounds[J].Planta,1999,207:604-611.
[6]张志良,瞿伟菁.植物生理学实验指导[M].第三版.北京:高等教育出版社,2003
[7]王瑾,刘桂茹,杨学举.PEG胁迫下不同抗旱性小麦品种幼苗形态及主要理化特性的比较[J].河北农业大学学报,2005,28(5):6-10.
[8]江行玉,赵可夫.植物重金属伤害及其抗性机理[J].应用与环境生物学报,2001,7(1):92-99.
[9] DI TOPPI L S,GABBRIELLI R. Response to cadmium in higher plants[J].Environmental and experimental botany,1999,41(2):105-130.
[10] SANDALIO L M,DALURZO H C,GOMEZ M,et al. Cadmiuminduced changes in the growth and oxidative metabolism of pea plants[J].Journal of experimental botany,2001,52(364):2115-2126.
[11]何翠屏,王慧忠.镉对草坪植物生长特性及生物量的影响[J].草业科学,2003,20(5):32-34.
[12]徐卫红,王宏信,王正银,等.重金属富集植物黑麦草对锌、镉复合污染的响应[J].中国农学通报,2006,22(6):365-368.