Repositorio
Institucional

Orlando, Julieta

Renderos, Laura

Zuniga-Feest, Alejandra

Delgado, Mabel

Munoz, Gaston

Caru, Margarita

Cluster roots of Embothrium coccineum growing under field conditions differentially shape microbial diversity according to their developmental stage

SPRINGER INT PUBL AG

JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION

en

Cluster roots are modifications of the root system developed by some plants as a strategy to increase the availability of nutrients in the soil through the exudation of carboxylates. Embothrium coccineum is an endemic species to Southern South America bearing cluster roots, which chemically and biochemically modify their rhizosphere depending on their developmental stage. We evaluated how cluster roots shape microbial diversity according to their developmental stage. We determined genetic and metabolic profiles of bacterial communities from bulk soil, root soil (close to E. coccineum roots), and rhizosphere soil from non-cluster roots and cluster roots in different developmental stages (i.e. juvenile, mature, semi-senescent, and senescent). In addition, the exudation rates of mature and non-cluster roots and the chemical characteristics from bulk and root soils were assessed. Root soil had higher nitrate and potassium contents and was more acidic than bulk soil probably due to the carboxylates exuded by the root system. These edaphic properties were related to differences in microbial community diversity. At the genetic level, the communities associated with the juvenile cluster roots presented a significantly different profile from those derived from the rest of the rhizosphere. Conversely, at the metabolic level, the carbon sources' consumption profiles of the senescent cluster roots were significantly different from the others. Our results suggest a selection or recruitment of microorganisms at the beginning of the development of E. coccineum cluster roots and a succession of metabolic capabilities of the microbial community throughout the development of cluster roots.

artículo original

The research was funded by the projects FONDECYT 11080162 and 1180699 led by AZ-F. MD thanks project FONDECYT 1210684.

La investigación fue financiada por los proyectos FONDECYT 11080162 y 1180699 liderados por AZ-F. MD agradece proyecto FONDECYT 1210684.

10.1007/s42729-022-00818-8

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Bacterial diversity

Cluster root soil

Genetic fingerprinting

Metabolic fingerprinting

South American Proteaceae

BACTERIAL COMMUNITY COMPOSITION

WHITE LUPIN

PROTEOID ROOTS

AMINO-ACIDS

SOIL-PH

RHIZOSPHERE

PHOSPHORUS

PLANT

PROTEACEAE

COMPLEX

Ciencias Vegetales

Ciencias Ambientales

Ciencia del suelo

Diversidad bacteriana

Suelo de raíz de racimo

Huellas genéticas

Huellas metabólicas

Proteáceas sudamericanas

COMPOSICIÓN DE LA COMUNIDAD BACTERIANA

LUPIN BLANCO

RAÍCES PROTEOIDES

AMINOÁCIDOS

PH DEL SUELO

RHIZOSFERA

FÓSFORO

PLANTA

PROTEACEAE

COMPLEJO

Botánica

Ciencias del suelo

Microbiología

Cluster roots of Embothrium coccineum growing under field conditions differentially shape microbial diversity according to their developmental stage

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artículo original

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https://rdcu.be/dJFz9

ANID-FONDECYT 11080162

ANID-FONDECYT 1180699

ANID-FONDECYT 1210684]

ANID FONDECYT 11080162

ANID FONDECYT 1180699

ANID FONDECYT 1210684]

WOS:000772264100002