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- Title
Soil potassium is correlated with root secondary metabolites and root-associated core bacteria in licorice of different ages.
- Authors
Liu, Yang; Li, Yanmei; Luo, Wen; Liu, Shuang; Chen, Weimin; Chen, Chun; Jiao, Shuo; Wei, Gehong
- Abstract
Aims: Licorice (Glycyrrhiza uralensis Fisch.) is a crucial medicinal herb as it accumulates glycyrrhizin and liquiritin in roots. Licorice root-associated bacterial communities shaped by soil characteristics are supposed to regulate the accumulation of root secondary metabolites. Methods: The soil characteristics, root secondary metabolites, and root-associated bacterial communities were analyzed in licorice plants of different ages to explore their temporal dynamics and interaction mechanisms. Results: Temporal variation in soil characteristics and root secondary metabolites was distinct. The alpha-diversity of root-associated bacterial communities decreased with root proximity, and the community composition was clustered in the rhizosphere. Different taxa that were core-enriched from the dominant taxa in the bulk soil, rhizosphere soil, and root endosphere displayed varied time–decay relationships. Soil total potassium (TK) as a key factor regulated the temporal variation in some individual taxa in the bulk and rhizosphere soils; these taxa were associated with the adjustment of root secondary metabolites across different TK levels. Conclusions: Licorice specifically selects root-associated core bacteria over the course of plant development, and TK is correlated with root secondary metabolites and individual core-enriched taxa in the bulk and rhizosphere soils, which may have implications for practical licorice cultivation.
- Subjects
METABOLITES; LICORICE (Plant); RHIZOSPHERE; SOILS; BACTERIAL communities; POTASSIUM
- Publication
Plant & Soil, 2020, Vol 456, Issue 1/2, p61
- ISSN
0032-079X
- Publication type
Article
- DOI
10.1007/s11104-020-04692-0