三裂叶蟛蜞菊根系分泌物对菜心的化感作用  

Allelopathic potentials of root exudates of Wedelia trilobata on Brassica parachinensis

作　　者：聂呈荣[1] 甄畅迪[1] 杨宣华 邓日烈[1] 李梅[1] 杨瑜蓉[1] 

机构地区：[1]佛山科学技术学院作物遗传育种研究所,广东佛山528231 [2]佛山市华材职业技术学校,广东佛山528000

出　　处：《佛山科学技术学院学报（自然科学版）》2010年第6期1-3,共3页Journal of Foshan University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(30570336);中国博士后科学基金资助项目(2005038179);广东省自然科学基金资助项目(05300829)

摘　　要：研究了三裂叶蟛蜞菊根系分泌物对菜心种子萌发和植株生长的影响。结果表明:1)抑制菜心种子萌发效果明显,显著降低了菜心种子的发芽势和发芽率,使菜心幼苗的根长和苗高显著缩短;2)显著降低了菜心植株的叶片叶绿素含量、净光合速率、根系活力、根系鲜质量和地上部鲜质量,株高变矮;3)显著降低了菜心叶片保护酶活性和硝酸还原酶活性,使植株自我保护机制降低,抗逆能力减弱,正常的氮素代谢受阻。The allelopathic potentials of root exudates of W. trilobata on Chinese cabbage （Brassica parachlnensis Bailey） were studied. Firstly, the root exudates of W. trilobata reduced the seed germination percentage of Chinese cabbage as well as the leaf chlorophyll content, the net photosynthetic rate, the root activity, the fresh root weight, the fresh weight of aerial part and the plant height. Secondly, it significantly inhibited Chinese cabbage＇s activities of catalase, superoxide dismutase and peroxidases. Finally, the root exudates of W. trilobata significantly reduced the activities of nitrate reduetase and the key enzyme concerning nitrogen metabolism in plant. Comprehensively, root exudates of W. trilobata interrupted Chinese cabbage＇s healthy metabolism and normal growth.

关 键 词：三裂叶蟛蜞菊 根系分泌物 菜心 化感作用 

分 类 号：S634.5[农业科学—蔬菜学]