The plant Solanaceae family is one of the most important for global agriculture and nutrition. Within this plant family, two plant species stand out for their economic importance and for human consumption, which are tomato (Solanum lycopersicum) and chili pepper (Capsicum annuum). Moreover, those plants support diverse and characteristic microbial communities that are uniquely suited to the plant habitat and intimately connected to plant health. The main objective of this work is the bacterial community characterization in the rhizobiome of tomato and chili pepper, cultivated in arid environments. Five crop fields located in the south of the peninsula of Baja California, Mexico, were sampled. Total DNA was extracted from rhizosphere, rhizoplane, and endophytic root compartment and sequenced by Illumina MiniSeq platform technology applied to 16S rRNA gene V3 region. We were able to obtain 1,195,426 total reads and 1,725,258 total reads for tomato and chili pepper samples, respectively. The analysis of the bacterial community structures confirmed that the two plant species showed differences in their microbial community structures. Nonetheless, the microbial community structures were directly and equally influenced by the crop field localization of each plant species. Interestingly, we determined that in both plant species, the Proteobacteria was the main phylum. In conclusion, we found that several bacterial families are part of the core rhizobiome (28 OTUs) for both tomato and chili pepper, but the most abundant were the Pseudomonadaceae family and the Pseudomonas genus, which most probably play a pivotal role in the microbial ecology to benefit both crop plants.

中文翻译：

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沙漠土壤中茄科植物的根茎生物组的细菌群落特征

茄科植物是全球农业和营养最重要的植物之一。在该植物科中，有两种植物因其经济重要性和人类食用而引人注目，分别是番茄（Solanum lycopersicum）和辣椒（Capsicum annuum）。此外，这些植物支持各种独特的微生物群落，这些微生物群落独特地适合于植物栖息地，并与植物健康密切相关。这项工作的主要目的是在干旱环境下种植的番茄和辣椒的根茎生物组中的细菌群落特征。对位于墨西哥下加利福尼亚半岛南部的五个农田进行了采样。从根际，根际平面，并通过Illumina MiniSeq平台技术对内生根区室进行测序，并将其应用于16S rRNA基因V3区。我们分别获得了番茄和辣椒样品的1,195,426个总读数和1,725,258个总读数。对细菌群落结构的分析证实，这两种植物在微生物群落结构上显示出差异。尽管如此，微生物群落结构直接和同等地受每种植物物种的作物田地定位的影响。有趣的是，我们确定在两种植物中，Proteobacteria是主要的门。总之，我们发现对于番茄和辣椒，几个细菌家族都是核心根瘤菌组（28 OTU）的一部分，但最丰富的是假单胞菌科和假单胞菌属，