Plant growth enhancement is not a conserved feature in the Caulobacter genus

被引：23
作者：
Berrios, Louis [1 ]
Ely, Bert [1 ]
机构：
[1] Univ South Carolina, Dept Biol Sci, Columbia, SC 29208 USA
来源：
PLANT AND SOIL | 2020年 / 449卷 / 1-2期
基金：
美国国家卫生研究院;
关键词：
Caulobacter; Genomics; Plant growth enhancement; Plant growth inhibition; COMPLETE GENOME SEQUENCE; ACC DEAMINASE; BACTERIA; BIOSYNTHESIS; PHOSPHATE; ARABIDOPSIS; RHIZOSPHERE; DATABASE;
D O I：
10.1007/s11104-020-04472-w
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
Aims Species within the Caulobacter genus have been termed 'hub species' in the plant microbiome. To understand these interactions, we assessed the interactions between several Caulobacter strains and a common host plant. Methods We identified a set of 11 Caulobacter strains that range in genetic diversity and tested them for their ability to increase the growth of Arabidopsis thaliana. In addition, biochemical assays were employed to determine if these Caulobacter strains produce common plant growth promoting (PGP) biosynthates. To identify potential PGP-related genes, genomic analyses were performed to compare the genomes of PGP Caulobacter strains to those of non-PGP Caulobacter strains. Results For the PGP Caulobacter strains, we observed that common PGP biosynthates did not contribute to the observed Caulobacter-mediated plant growth stimulation. Genomic analyses suggested that the genomes of PGP strains maintain similar metabolic pathways compared to those of non-PGP strains, and that common genes related to PGP factors do not explain the PGP mechanisms for the Caulobacter strains we analyzed. Conclusions Plant growth enhancement is not a conserved feature in the Caulobacter genus, and some Caulobacter strains even inhibit plant growth. Moreover, common PGP factors do not fully explain Caulobacter-mediated plant growth enhancement.
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收藏
页码：81 / 95
页数：15
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