Alleopathy of Perennial Ryegrass Aqueous Extract on Zoysia japonica
This study investigated the allelopathic interaction between perennial ryegrass Lolium perenne and Zoysia japonica cv.Lanyin No.3 using a pot experiment.Z.japonica was used as the recipient material,and the effects of various concentrations of perennial ryegrass aqueous extract on its morphological,physiological,and leaf anatomical characteristics were examined.The results showed that perennial ryegrass water extract sig-nificantly reduced the fresh weight,tiller number,root length,and leaf length of Lanyin No.3 stolons(P<0.05).Leaf aspect ratio also increased significantly.The thickness of the cuticle,upper and lower epidermal cells,vascular bundle diameter,main lateral vein diameter,and vesicular cell width within Z.japonica leaves all decreased significantly with increasing extract concentration.Chlorophyll content in stolons decreased signifi-cantly,while peroxidase(POD)activity,malondialdehyde(MDA)content,and relative conductivity all increased significantly in response to the extract.Catalase(CAT)and superoxide dismutase(SOD)activities of stolons exhibited a trend of initial stimulation at lower concentrations followed by inhibition at higher concentra-tions.The most pronounced effects were observed at extract concentration of 0.6 and 0.8 g/mL.Compared to the control,these treatments resulted in a 75.51%decrease in total root length,a 53.62%increase in leaf aspect ratio,an 80.50%increase in MDA content,and a 77.93%increase in relative conductivity.These find-ings indicate that the aqueous extract of perennial ryegrass has a significant inhibitory effect on the growth of Z.japonica,potentially leading to a stunted growth,delayed greening in spring,and even mortality.
Aqueous extract of perennial ryegrassZoysia japonica cv.Lanyin No.3RegreenAlle-lopathy
NETL
NSTL
万方数据
