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Title: Site and clone effects on the potato-root associated core microbiome and its relationship to tuber yield and nutrients

Author
item Barnett, Brittany
item HOLM, DAVID - Colorado State University
item KOYM, JEFFERY - Texas A&M University
item WILSON, ROBERT - University Of California Agriculture And Natural Resources (UCANR)
item Manter, Daniel

Submitted to: American Journal of Potato Research
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/29/2014
Publication Date: 8/9/2014
Publication URL: http://DOI:10.1007/s12230-014-9405-9
Citation: Barnett, B.A., Holm, D., Koym, J., Wilson, R., Manter, D.K. 2014. Site and clone effects on the potato-root associated core microbiome and its relationship to tuber yield and nutrients. American Journal of Potato Research. 92:1-9.DOI:10.1007/s12230-014-9405-9.

Interpretive Summary: The aim of this study was to describe the variability in the root-associated bacterial community due to location and clone, and to determine whether an underlying core bacterial community exists that might benefit the quality of the potato crop. Root-associated bacterial communities were examined with 454 sequencing. Variance analysis using perMANOVA attributed 45.4% and 24.1% of the community variability to site and clone effects, respectively. A total of 123 bacterial operational taxonomic units were correlated with tuber yield and/or tuber nutrient content; the majority of these belong to the order Rhizobiales. Rhizobiales bacteria are recognized contributors to crop nitrogen needs for many legumes; however, no known symbiotic relationship between potato roots and nitrogen fixing bacteria exists. Within the Rhizobiales order, the genus Devosia is a major contributor to both the presence/absence core “bacteriome” and the sparse partial least squares core “bacteriome,” thus further exploration into this unknown relationship is warranted.

Technical Abstract: The aim of this study was to describe the variability in the root-associated bacterial community due to location and clone, and to determine whether an underlying core bacterial community exists that might benefit the quality of the potato crop. Root-associated bacterial communities were examined with 454 sequencing. Variance analysis using perMANOVA attributed 45.4% and 24.1% of the community variability to site and clone effects, respectively. A total of 123 bacterial operational taxonomic units were correlated with tuber yield and/or tuber nutrient content; the majority of these belong to the order Rhizobiales. Rhizobiales bacteria are recognized contributors to crop nitrogen needs for many legumes; however, no known symbiotic relationship between potato roots and nitrogen fixing bacteria exists. Within the Rhizobiales order, the genus Devosia is a major contributor to both the presence/absence core “bacteriome” and the sparse partial least squares core “bacteriome,” thus further exploration into this unknown relationship is warranted.