麻疯树(Jatropha curcas)叶浸提液对万寿菊(Tagetes erecta L.)幼苗生长和抗氧化酶活性的影响(英文)

[目的]研究麻疯树叶浸提液对万寿菊幼苗生长和抗氧化酶活性的化感影响,揭示麻疯树对林下植物的化感生理机制。[方法]对麻疯树叶浸提液对万寿菊幼苗的生长、丙二醛(MDA)、脯氨酸(Proline)和抗氧化酶系统的影响进行研究和分析。[结果]与对照相比,麻疯树叶浸提液加入土壤后,明显抑制了万寿菊根和茎的生长;同时,在叶浸提液中,万寿菊根中的O2-、H2O2、丙二醛和脯氨酸的含量升高,且浸提液浓度的增加而增加;另外,麻疯树叶浸提液在较低浓度时,超氧化物歧化酶(SOD)和过氧化物酶(POD)活性无显著变化,而在较高浓度时,SOD酶活性明显增加;所有浓度的叶浸提液都显著增加了万寿菊根中过氧化氢酶(CAT)和抗坏血酸过氧化物酶(APX)活性,且随着浓度的增加而增加。[结论]麻疯树能释放化感物质进入土壤,抑制植物的生长和生理,改变植物群落组成和结构。

Allelopathic Effects of Jatropha curcas Leaf Leachates on Seedling Gro wth and Antioxidative Enzymes in Tagetes erecta L.

[Objective] This study was to investigate the allelopathic effects of J.curcas leaf leachates on seedling growth and antioxidative enzymes,and thus to reveal physiologically allelopathic effects of J.curcas trees on undergrowth plants.[Method] The allelopathic effects of leaf leachates of Jatropha curcas amended into soil were determined on the growth,proline and malondialdehyde(MDA) contentas well as superoxide dismutase(SOD),catalase(CAT),ascorbate peroxidase(APX),guaiacol peroxidase(POD) in roots of mari...