The ancestral environment of teosinte populations shapes their root microbiome.

IF 6.2 2区 环境科学与生态学 Q1 GENETICS & HEREDITY
Christopher J Barnes, Maria Sophie Bünner, M Rosario Ramírez-Flores, Ida Broman Nielsen, Jazmin Ramos-Madrigal, Daria Zharikova, Chloee M McLaughlin, M Thomas Gilbert, Ruairidh J H Sawers
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Abstract

Background: The composition of the root microbiome affects the host's growth, with variation in the host genome associated with microbiome variation. However, it is not known whether this intra-specific variation of root microbiomes is a consequence of plants performing targeted manipulations of them to adapt to their local environment or varying passively with other traits. To explore the relationship between the genome, environment and microbiome, we sampled seeds from teosinte populations across its native range in Mexico. We then grew teosinte accessions alongside two modern maize lines in a common garden experiment. Metabarcoding was performed using universal bacterial and fungal primers to profile their root microbiomes.

Results: The root microbiome varied between the two modern maize lines and the teosinte accessions. We further found that variation of the teosinte genome, the ancestral environment (temperature/elevation) and root microbiome were all correlated. Multiple microbial groups significantly varied in relative abundance with temperature/elevation, with an increased abundance of bacteria associated with cold tolerance found in teosinte accessions taken from high elevations.

Conclusions: Our results suggest that variation in the root microbiome is pre-conditioned by the genome for the local environment (i.e. non-random). Ultimately, these claims would be strengthened by confirming that these differences in the root microbiome impact host phenotype, for example, by confirming that the root microbiomes of high-elevation teosinte populations enhance cold tolerance.

茶树种群的祖先环境塑造了其根部微生物群。
背景:根微生物组的组成会影响宿主的生长,宿主基因组的变化与微生物组的变化有关。然而,尚不清楚根部微生物组的这种特异性内变异是植物为适应当地环境而对其进行有针对性操作的结果,还是随着其他性状的变化而被动变化的结果。为了探索基因组、环境和微生物组之间的关系,我们从墨西哥原产地的茶树种群中采集了种子样本。然后,我们在一个共同的花园实验中,将茶树蛋白与两个现代玉米品系一起种植。我们使用通用细菌和真菌引物进行了元条形编码,以描述它们的根微生物组:结果:两个现代玉米品系和茶树新芽品种的根部微生物组存在差异。我们进一步发现,茶树蛋白基因组、祖先环境(温度/海拔)和根部微生物组的变化都是相关的。多个微生物群的相对丰度随温度/海拔的变化而显著不同,在高海拔地区的茶树品种中,与耐寒性相关的细菌丰度增加:我们的研究结果表明,根部微生物组的变异是由当地环境的基因组预先决定的(即非随机)。最终,通过证实根部微生物组的这些差异会影响宿主的表型(例如,通过证实高海拔茶树种群的根部微生物组增强了耐寒性),这些说法将得到加强。
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来源期刊
Environmental Microbiome
Environmental Microbiome Immunology and Microbiology-Microbiology
CiteScore
7.40
自引率
2.50%
发文量
55
审稿时长
13 weeks
期刊介绍: Microorganisms, omnipresent across Earth's diverse environments, play a crucial role in adapting to external changes, influencing Earth's systems and cycles, and contributing significantly to agricultural practices. Through applied microbiology, they offer solutions to various everyday needs. Environmental Microbiome recognizes the universal presence and significance of microorganisms, inviting submissions that explore the diverse facets of environmental and applied microbiological research.
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