• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological research >Instantaneous responses of microbial communities to stress in soils pretreated with Mentha spicata essential oil and/or inoculated with arbuscular mycorrhizal fungus
【24h】

Instantaneous responses of microbial communities to stress in soils pretreated with Mentha spicata essential oil and/or inoculated with arbuscular mycorrhizal fungus

机译：用薄荷薄荷精油预处理和/或接种丛枝菌根真菌的土壤中微生物群落对胁迫的瞬时响应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The instantaneous response of a soil microbial community to a chemical stressor (Mentha spicata essential oil) was studied post acclimation to the same chemical treatment at lower exposure. Acclimation involved the repeated addition of small amounts of the essential oil weekly for a period of 1 month, while for the stress treatment, a 10-fold exposure level was introduced. We also tested the role of arbuscular mycorrhizal fungus (AMF) in the reponse of microbial community to the same stress exposure by pre-inoculating plant roots in the soil with the AMF Rhizophagus irregularis. Three days after stress exposure, the structure of the soil microbial community was investigated in addition to the activities of six soil enzymes mainly related to the N-cycle. The two preselected AMF inoculation and acclimation soil microbial communities responded differently to the subsequent stress. Acclimation enhanced the biomass of G(+) bacteria, fungi and microeukaryotes, showing a priming effect of a low-intensity stimulus when applied repeatedly, while AMF inoculation decreased the biomass of these microbial groups. The relative changes in microbial biomasses in jointly pretreated samples were not different from the control, suggesting opposing effects of the two pretreatments. On the contrary, the jointly pretreated samples responded to stress exposure by exhibiting increased activity of asparaginase and glutaminase and reduced activity of arylamidase. Finally, the relationship between enzyme activities and certain microbial ratios denotes that specific activities depended on the relative abundance of specific functional groups (e.g., G(+) or G(-)) rather than on their biomass per se.
机译：在适应较低暴露量的相同化学处理后，研究了土壤微生物群落对化学胁迫（Mentha spicata香精油）的瞬时响应。适应过程包括每周重复添加少量精油，持续1个月，而对于压力治疗，则引入10倍的暴露水平。我们还通过预先用不规则AMF根瘤菌接种土壤中的植物根，测试了丛枝菌根真菌（AMF）在微生物群落对相同胁迫暴露的反应中的作用。暴露三天后，除了主要与N循环有关的六种土壤酶的活性外，还研究了土壤微生物群落的结构。两个预先选择的AMF接种和适应性土壤微生物群落对后续压力的反应不同。驯化提高了G（+）细菌，真菌和微真核生物的生物量，当反复使用时显示出低强度刺激的启动效果，而AMF接种则降低了这些微生物组的生物量。联合预处理样品中微生物生物量的相对变化与对照无差异，表明两种预处理的相反作用。相反，共同预处理的样品通过表现出增加的天冬酰胺酶和谷氨酰胺酶活性和降低的芳基酰胺酶活性来应对压力暴露。最后，酶活性与某些微生物比例之间的关系表明，特定活性取决于特定官能团（例如，G（+）或G（-））的相对丰度，而不是其本身的生物量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号