| 不同悉生培养条件下食细菌线虫对细菌种群的影响 |
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| 引用本文： | 陈小云,胡锋,李辉信,毛小芳. 不同悉生培养条件下食细菌线虫对细菌种群的影响[J]. 应用生态学报, 2003, 14(9): 1585-1587 |
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| 作者姓名： | 陈小云 胡锋 李辉信 毛小芳 |
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| 作者单位： | 南京农业大学资源与环境学院,南京210095 |
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| 基金项目： | 国家自然科学基金资助项目(39970419) |
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| 摘 要： | 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.
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| 关 键 词： | 硫 重金属 土壤 植物解毒 形态转化 |
| 文章编号： | 1001-9332(2003)09-1585-03 |
| 修稿时间： | 2001-11-09 |
Effect of bacterivorous nematodes on bacteria population under gnotobiotic culture |
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| CHEN Xiaoyun,HU Feng,LIHuixin,MAO Xiaofang. Effect of bacterivorous nematodes on bacteria population under gnotobiotic culture[J]. The journal of applied ecology, 2003, 14(9): 1585-1587 |
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| Authors: | CHEN Xiaoyun HU Feng LIHuixin MAO Xiaofang |
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| Affiliation: | College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China. xiaoyunchl@163.com |
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| Abstract: | A gnotobiotic microcosm experiment was conducted to study the influence of bacterivorous nematodes (Protorhabditis sp.) on bacteria (Pseudomonas fluorescens) population under different conditions including substrate concentration, oscillation pattern, and numbers of nematodes inoculated. When the bacteria were incubated under intermittent oscillation by hand (6 times at 0.5 h intervals, 22 degrees C), their growth was stimulated in the presence of nematoedes, and the bacteria grew faster with the increase of nematode numbers and substrate (liquid potato-sucrose medium) concentration. However, when the incubation was under continuous oscillation (100 rpm, 22 degrees C), bacteria population 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 population was discussed. |
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| Keywords: | Gnotobiotic culture Bacterivorous nematodes Bacteria Population. |
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