Abstract:

The study used Alternanthera philoxeroides as material, the subjects plants were Vicia faba and Zea may. The effects of Alternanthera philoxeroides Griseb on the seed germination of two species were studied by using culture dish filter paper method. The physiological index of tested crops MDA content, peroxidase (POD) activity changes, micronucleus rate changes of Vicia faba root-tip cell were detected. The result showed aqueous extracts form Alternanthera philoxeroides Griseb were affected to different degrees for the tested Vicia faba and Zea mays germination rate, made seedlings malondialdehyde (MDA) content to increase, made seedlings superoxide dismutase (SOD) and peroxidase (POD) activity firstly to increase and then to decrease trend, also made root tip cells of Vicia micronucleus rate to increase. The tested crops were oxidative stressed by water-soluble allelochemicals form Alternanthera philoxeroides Griseb. Antioxidant enzyme systems and root tip cells mitosis were inhibited. The aqueous extracts form the different Organizations Alternanthera philoxeroides Griseb affected Vicia faba and Zea mays seedlings germination and growth.