百里香属植物的植物相关微生物群是否适应植物精油？

Is the plant-associated microbiota of Thymus spp. adapted to plant essential oil?

作者信息

Checcucci Alice, Maida Isabel, Bacci Giovanni, Ninno Cristina, Bilia Anna Rita, Biffi Sauro, Firenzuoli Fabio, Flamini Guido, Fani Renato, Mengoni Alessio

机构信息

Department of Biology, University of Florence, Via Madonna del Piano 6, I-50019 Sesto Fiorentino, Florence 50019, Italy.

Department of Chemistry Ugo Schiff, University of Florence, Via Ugo Schiff 6, I-50019 Sesto Fiorentino, Florence 50019, Italy.

出版信息

Res Microbiol. 2017 Apr;168(3):276-282. doi: 10.1016/j.resmic.2016.11.004. Epub 2016 Nov 21.

DOI:10.1016/j.resmic.2016.11.004

PMID:27884782

Abstract

We examined whether the microbiota of two related aromatic thyme species, Thymus vulgaris and Thymus citriodorus, differs in relation to the composition of the respective essential oil (EO). A total of 576 bacterial isolates were obtained from three districts (leaves, roots and rhizospheric soil). They were taxonomically characterized and inspected for tolerance to the EO from the two thyme species. A district-related taxonomic pattern was found. In particular, high taxonomic diversity among the isolates from leaves was detected. Moreover, data obtained revealed a differential pattern of resistance of the isolates to EOs extracted from T. vulgaris and T. citriodorus, which was interpreted in terms of differing chemical composition of the EO of their respective host plants. In conclusion, we suggest that bacterial colonization of leaves in Thymus spp. is influenced by the EO present in leaf glandular tissue as one of the selective forces shaping endophytic community composition.

摘要

我们研究了两种相关的芳香百里香属植物，即普通百里香（Thymus vulgaris）和柠檬百里香（Thymus citriodorus）的微生物群在各自精油（EO）组成方面是否存在差异。总共从三个部位（叶片、根系和根际土壤）获得了576株细菌分离株。对它们进行了分类学鉴定，并检测了它们对这两种百里香属植物精油的耐受性。发现了一种与部位相关的分类模式。特别是，检测到叶片分离株具有较高的分类多样性。此外，所获得的数据显示，分离株对从普通百里香和柠檬百里香中提取的精油具有不同的抗性模式，这可以根据它们各自寄主植物精油的不同化学成分来解释。总之，我们认为百里香属植物叶片的细菌定殖受到叶腺组织中存在的精油的影响，这是塑造内生群落组成的选择力量之一。