• 研究报告 •
YANG Yang1,2, LIU Shou-wei1, PAN Kai1, WU Feng-zhi1
Abstract: Taking the Chinese onion cultivars with different allelopathy potentials as the donor and cucumber as the accepter, this paper studied the effects of Chinese onion’s root exudates on the seedlings growth of cucumber and the culturable microbial number and bacterial community structure in the seedlings rhizosphere soil. The root exudates of the Chinese onion cultivars could promote the growth of cucumber seedlings, and the stimulatory effect increased with the increasing concentration of the root exudates. However, at the same concentrations of root exudates, the stimulatory effect had no significant differences between the Chinese onion cultivars with strong and weak allelopathy potential. The root exudates of the Chinese onion cultivars increased the individual numbers of bacteria and actinomyces but decreased those of fungi and Fusarium in rhizosphere soil, being more significant for the Chinese onion cultivar with high allelopathy potential (L-06). The root exudates of the Chinese onion cultivars also increased the bacterial community diversity in rhizosphere soil. The cloning and sequencing results indicated that the differential bacteria bands were affiliated with Actinobacteria, Proteobacteria, and Anaerolineaceae, and Anaerolineaceae only occurred in the rhizosphere soil in the treatment of high allelopathy potential Chinese onion (L-06). It was suggested that high concentration (10 mL per plant) of root exudates from high allelopathy potential Chinese onion (L-06) could benefit the increase of bacterial community diversity in cucumber seedlings rhizosphere soil.
杨阳1,2,刘守伟1,潘凯1,吴凤芝1**. 分蘖洋葱根系分泌物对黄瓜幼苗生长及根际土壤微生物的影响[J]. 应用生态学报.
YANG Yang1,2, LIU Shou-wei1, PAN Kai1, WU Feng-zhi1. Effects of Chinese onion’s root exudates on cucumber seedlings growth and rhizosphere soil microorganisms.[J]. Chinese Journal of Applied Ecology.