Specialized microbiomes facilitate natural rhizosphere microbiome interactions counteracting high salinity stress in plants
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
Specialized microbiomes facilitate natural rhizosphere microbiome interactions counteracting high salinity stress in plants. / Santos, Susana Silva; Rask, Klara Andrés; Vestergård, Mette; Johansen, Jesper Liengaard; Priemé, Anders; Frøslev, Tobias Guldberg; González, Ana M. Martín; He, Huan; Ekelund, Flemming.
In: Environmental and Experimental Botany, Vol. 186, 104430, 2021.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Specialized microbiomes facilitate natural rhizosphere microbiome interactions counteracting high salinity stress in plants
AU - Santos, Susana Silva
AU - Rask, Klara Andrés
AU - Vestergård, Mette
AU - Johansen, Jesper Liengaard
AU - Priemé, Anders
AU - Frøslev, Tobias Guldberg
AU - González, Ana M. Martín
AU - He, Huan
AU - Ekelund, Flemming
PY - 2021
Y1 - 2021
N2 - The root microbiota is crucial for plant productivity and stress tolerance. Still, our understanding of the factors that structure these microbial communities is limited, and we lack a theoretical framework to predict their assemblage and interactions. Here, we used rice as a model system to explore the hypothesis that microbiomes from specific environments enhance plant tolerance to salinity. We used 16S rRNA sequencing to track salinity-induced changes in microbiomes of plants inoculated with either a rice field microbiome, or a halotolerant microbiome, compared to only the seed microbiome. We found that, at salinities higher than 1.1 % plant growth was severely impeded. Nevertheless, at 0.11 % and 0.35 % salinity, plants inoculated with rice field and halotolerant microbiomes displayed enhanced shoot and root biomass, when compared to plants surviving only with the seed microbiome. Rice field microbiome had the highest plant growth-promoting effect and was the only treatment that promoted growth at 0.35 % salinity. The salinity effects on bacterial composition and alpha diversity were more pronounced for plants that relied only on the seed microbiome. The root-associated compartments harboured distinct microbiomes, but salinity explained most of the variation observed. Rice plants interacted with the rice field and halotolerant microbiomes to shape rhizosphere microbial community composition and the co-occurrence patterns, supporting plant growth at higher salinity. Assemblages of the halotolerant microbiome promoted similar network structures between the different salinity treatments, when compared to the other inoculations. Moreover, salinity responsive and keystone bacteria were taxonomically diverse and responded in guilds of taxa to the salinity levels. We conclude that both specialized inoculations differ greatly in how they influence the plant microbiome and that plant growth at higher salinity levels was associated with a denser and more complex root microbial community.
AB - The root microbiota is crucial for plant productivity and stress tolerance. Still, our understanding of the factors that structure these microbial communities is limited, and we lack a theoretical framework to predict their assemblage and interactions. Here, we used rice as a model system to explore the hypothesis that microbiomes from specific environments enhance plant tolerance to salinity. We used 16S rRNA sequencing to track salinity-induced changes in microbiomes of plants inoculated with either a rice field microbiome, or a halotolerant microbiome, compared to only the seed microbiome. We found that, at salinities higher than 1.1 % plant growth was severely impeded. Nevertheless, at 0.11 % and 0.35 % salinity, plants inoculated with rice field and halotolerant microbiomes displayed enhanced shoot and root biomass, when compared to plants surviving only with the seed microbiome. Rice field microbiome had the highest plant growth-promoting effect and was the only treatment that promoted growth at 0.35 % salinity. The salinity effects on bacterial composition and alpha diversity were more pronounced for plants that relied only on the seed microbiome. The root-associated compartments harboured distinct microbiomes, but salinity explained most of the variation observed. Rice plants interacted with the rice field and halotolerant microbiomes to shape rhizosphere microbial community composition and the co-occurrence patterns, supporting plant growth at higher salinity. Assemblages of the halotolerant microbiome promoted similar network structures between the different salinity treatments, when compared to the other inoculations. Moreover, salinity responsive and keystone bacteria were taxonomically diverse and responded in guilds of taxa to the salinity levels. We conclude that both specialized inoculations differ greatly in how they influence the plant microbiome and that plant growth at higher salinity levels was associated with a denser and more complex root microbial community.
KW - 16S rRNA gene
KW - Halotolerant crops
KW - Microbiome transfer
KW - Rhizosphere effects
KW - Rice
KW - Seed endophytes
U2 - 10.1016/j.envexpbot.2021.104430
DO - 10.1016/j.envexpbot.2021.104430
M3 - Journal article
AN - SCOPUS:85101783199
VL - 186
JO - Environmental and Experimental Botany
JF - Environmental and Experimental Botany
SN - 0098-8472
M1 - 104430
ER -
ID: 260748488