The nutrient-improvement bacteria selected by Agave lechuguilla T. and their role in the rhizosphere community.

FEMS Microbiol Ecol

CONACyT- Division de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, A.C., 78216 San Luis Potosi, S.L.P., Mexico.

Published: October 2021

AI Article Synopsis

  • Agave lechuguilla thrives in the Chihuahuan Desert due to its relationship with plant growth-promoting rhizobacteria, which helps it grow in poor soils and harsh conditions.
  • The study examined how soil properties and different growth stages of the plant affect rhizobacterial communities, finding that mature lechuguilla plants enhance nutrient-improving bacteria and have higher levels of essential nutrients like organic carbon, ammonium, and nitrites/nitrates.
  • Nutrient availability is a key factor influencing the bacterial community structure, with specific bacteria showing strong connections to nutrient enhancement, ultimately aiding lechuguilla's growth in arid environments.

Article Abstract

Agave lechuguilla has one of the widest distributions among other agave species in the Chihuahuan Desert. Their capacity to grow in poorly developed soils and harsh conditions has been related to their association with plant growth-promoting rhizobacteria. In this work, we explored how soil properties and plant growth stage influence the composition of the rhizobacterial communities, their interactions, and the enzymatic activity and abundance of nitrogen-fixing bacteria and organic phosphorus-mineralizing bacteria in two subregions of the Chihuahuan Desert. We found that mature plants of lechuguilla stimulated the activity and abundance of nutrient-improvement rhizobacteria, and these soil samples had a higher content of total organic carbon, ammonium (NH4) and nitrite + nitrate (NO2+NO3). Nutrient availability seems to be an essential driver of the bacterial community's structure since the genera with more connections (hubs) were those with known mechanisms related to the availability of nutrients, such as env. OPS17 (Bacteroidetes), Gemmatimonadaceae uncultured, S0134terrestrial group, BD211terrestrial group (Gemmatimonadetes), Chthoniobacteracea and Candidatus Udaeobacter (Verrucomicrobia). This work shows that the late growth stages of lechuguilla recruit beneficial bacteria that favor its establishment and tolerance to harsh conditions of the arid lands.

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http://dx.doi.org/10.1093/femsec/fiab137DOI Listing

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The nutrient-improvement bacteria selected by Agave lechuguilla T. and their role in the rhizosphere community.

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CONACyT- Division de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, A.C., 78216 San Luis Potosi, S.L.P., Mexico.

Article Synopsis
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  • The study examined how soil properties and different growth stages of the plant affect rhizobacterial communities, finding that mature lechuguilla plants enhance nutrient-improving bacteria and have higher levels of essential nutrients like organic carbon, ammonium, and nitrites/nitrates.
  • Nutrient availability is a key factor influencing the bacterial community structure, with specific bacteria showing strong connections to nutrient enhancement, ultimately aiding lechuguilla's growth in arid environments.
View Article and Find Full Text PDF

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