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Subtercola endophyticus sp. nov.，一株从朝鲜冷杉中分离得到的耐寒细菌。

Subtercola endophyticus sp. nov., a cold-adapted bacterium isolated from Abies koreana.

机构信息

Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Jeollabuk-do, 56212, Republic of Korea.

Team of Vulnerable Ecological Research, Division of Climate and Ecology, Bureau of Conservation & Assessment Research, National Institute of Ecology (NIE), Seocheon, 33657, Republic of Korea.

出版信息

Sci Rep. 2022 Jul 15;12(1):12114. doi: 10.1038/s41598-022-16116-3.

DOI:10.1038/s41598-022-16116-3
PMID:35840645
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9287328/
Abstract

A novel Gram-stain-positive, aerobic bacterial strain, designated AK-R2A1-2, was isolated from the surface-sterilized needle leaves of an Abies koreana tree. Strain AK-R2A1-2 had 97.3% and 96.7% 16S rRNA gene sequence similarities with Subtercola boreus K300 and Subtercola lobariae 9583b, respectively, but formed a distinct phyletic lineage from these two strains. Growth of strain AK-R2A1-2 was observed at 4-25 °C at pH 5.0-8.0. Strain AK-R2A1-2 contained menaquinone 9 (MK-9) and menaquinone 10 (MK-10) as the predominant respiratory quinones. The major cellular fatty acids were anteiso-C and summed feature 8 (Cω7c or/and Cω6c), and the polar lipids included diphosphatidylglycerol (DPG) and three unknown aminolipids, AKL2, AKL3, and AKL4. The complete genome of strain AK-R2A1-2 was sequenced to understand the genetic basis of its survival at low temperatures. Multiple copies of cold-associated genes involved in cold-active chaperon, stress response, and DNA repair supported survival of the strain at low temperatures. Strain AK-R2A1-2 was also able to significantly improve rice seedling growth under low temperatures. Thus, this strain represents a novel species of the genus Subtercola, and the proposed name is Subtercola endophyticus sp. nov. The type strain is AK-R2A1-2 (= KCTC 49721 = GDMCC 1.2921).

摘要

一株新型革兰氏阳性、需氧细菌菌株，命名为 AK-R2A1-2，从韩国冷杉的表面消毒针叶中分离得到。菌株 AK-R2A1-2 与 Subtercola boreus K300 和 Subtercola lobariae 9583b 的 16S rRNA 基因序列相似性分别为 97.3%和 96.7%，但与这两个菌株形成了不同的系统发育谱系。菌株 AK-R2A1-2 在 4-25°C、pH5.0-8.0 的条件下生长。菌株 AK-R2A1-2 含有menaquinone 9 (MK-9)和menaquinone 10 (MK-10)作为主要的呼吸醌。主要的细胞脂肪酸是anteiso-C 和总和特征 8 (Cω7c 或/和 Cω6c)，极性脂包括双磷脂酰甘油 (DPG)和三种未知的氨基脂，AKL2、AKL3 和 AKL4。为了了解其在低温下生存的遗传基础，对菌株 AK-R2A1-2 的全基因组进行了测序。多个与低温相关的基因的拷贝，包括冷活性伴侣、应激反应和 DNA 修复，支持了该菌株在低温下的生存。菌株 AK-R2A1-2 还能显著提高低温下水稻幼苗的生长。因此，该菌株代表了 Subtercola 属的一个新种，建议命名为 Subtercola endophyticus sp. nov.。模式菌株为 AK-R2A1-2(= KCTC 49721 = GDMCC 1.2921)。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acdb/9287328/d9fe8170c3b1/41598_2022_16116_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acdb/9287328/176a5eeeb7ed/41598_2022_16116_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acdb/9287328/5927866da61e/41598_2022_16116_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acdb/9287328/0a09714cc08d/41598_2022_16116_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acdb/9287328/d9fe8170c3b1/41598_2022_16116_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acdb/9287328/176a5eeeb7ed/41598_2022_16116_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acdb/9287328/5927866da61e/41598_2022_16116_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acdb/9287328/0a09714cc08d/41598_2022_16116_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acdb/9287328/d9fe8170c3b1/41598_2022_16116_Fig4_HTML.jpg

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