The Allelopathy of Plant Aqueous Extract of Oxalis corniculata to Radish and Lettuce
In order to explore the allelopathic effects of invasive plants Oxalis corniculata and its possible physiological mechanism,germination and seedling growth of radish and lettuce seeds and plant protection of enzyme activity were measured after treated with different concentrations plants aqueous extracts of Oxalis corniculata.Obvious allelopathic inhibition of plant aqueous extract of Oxalis corniculata to radish and lettuce was observed.Radish and lettuce seed germination and seedling growth were inhibited and the degree of inhibition was enhanced with increase in plant aqueous extract concentration.This inhibition in radicle performance was stronger than hypocotyl.Different variation was observed in the activities of various protective enzymes of radish and lettuce seedling after treated with different concentrations plants aqueous extracts of Oxalis corniculata.POD and CAT activity continued to increase with increasing concentration;the low concentration of extract processing can be significantly enhanced CAT activity;POD activity continued to rise with increase in concentration;the activity of SOD did not show obvious regularity.MDA content continued to rise with increasing concentration.