Wild berries are interesting research subjects due to their rich sources of health-beneficial phenolic compounds. However, the internal microbial communities, endophytes, associated with the wild berry fruits are currently unknown. Endophytes are bacteria or fungi inhabiting inside plant tissues, and their functions vary depending on the host species and environmental parameters. The present study aimed to examine community composition of fungal and bacterial endophytes in fruits of three wild berry species (bilberry Vaccinium myrtillus L., lingonberry Vaccinium vitis-idaea L. and crowberry Empetrum nigrum L.) and the effects of host plant species and their growth sites on shaping the endophytic communities. We found that the endophytic community structures differed between the berry species, and fungi were predominant over bacteria in the total endophytic taxa. We identified previously unknown endophytic fungal taxa including Angustimassarina, Dothidea, Fellozyma, Pseudohyphozyma, Hannaella coprosmae and Oberwinklerozyma straminea. A role of soluble phenolic compounds, the intracellular components in wild berry fruits, in shaping the endophytic communities is proposed. Overall, our study demonstrates that each berry species harbors a unique endophytic community of microbes.

中文翻译：

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宿主物种塑造了野生浆果物种（Vaccinium myrtillus L.、Empetrum nigrum L. 和 Vaccinium v​​itis-idaea L.）果实中可培养内生菌的群落结构

野生浆果因其丰富的有益健康的酚类化合物来源而成为有趣的研究对象。然而，与野生浆果相关的内部微生物群落、内生菌目前尚不清楚。内生菌是寄居在植物组织内部的细菌或真菌，其功能因宿主物种和环境参数而异。本研究旨在检测三种野生浆果（越桔越桔越桔、越橘越桔和越橘Empetrum nigrum）果实中真菌和细菌内生菌的群落组成。L.) 以及寄主植物物种及其生长位点对塑造内生群落的影响。我们发现浆果物种之间的内生群落结构不同，并且在内生总分类群中真菌占优势。我们鉴定了以前未知的内生真菌类群，包括Angustimassarina、Dothidea、Fellozyma、Pseudohyphozyma、Hannaella coprosmae和Oberwinklerozyma straminea。提出了可溶性酚类化合物（野生浆果中的细胞内成分）在塑造内生群落中的作用。总的来说，我们的研究表明，每个浆果物种都拥有独特的内生微生物群落。