不同悉生培养条件下食细菌线虫对细菌种群的影响

编号 zgly0000322103

文献类型 期刊论文

文献题名 不同悉生培养条件下食细菌线虫对细菌种群的影响

作者 陈小云  胡锋  李辉信  毛小芳 

作者单位 南京农业大学资源与环境学院 

母体文献 应用生态学报 

年卷期 2003,14(9)

页码 1585-1587

年份 2003 

分类号 Q938.1 

关键词 Gnotobiotic  culture  Bacterivorous  nematodes  Bacteria  Population 

文摘内容 A gnotobiotic microcosm experiment was conducted to study the influence of bacterivorons nematodes (Protorhab-ditis sp. ) on bacteria (Pseudomonas fluorescens) population under different conditions including substrate concen-tration, oscillation pattern, and numbers of nematodes inoculated. When the bacteria were incubated under intermit-tent oscillation by hand (6 times at 0.5 h intervals, 22℃ ), their growth was stimulated in the presence of nema-todes, and the bacteria grew faster with the increase of nematode numbers and substrate (liquid potato-sucrose medi-um) concentration. However, when the incubation was under continuous oscillation (100 rpm, 22℃ ), bacteria pop-ulation was deflated with the addition of nematodes, and the inhibition was greater when a higher concentration of substrate was used. It was found that the stimulation or inhibition of bacteria population by nematodes occurred in the logarithmic stage of bacteria growth. The optimal and over-grazing of nematodes on regulating bacteria popula-tion was discussed。