Abstract
Abstract Rhizosphere microbes play important roles in plant tolerance to abiotic stresses. Plants of different genetic backgrounds acquire stress resistance by assembling specific rhizosphere microbial communities or typical beneficial microbiota. However, the molecular mechanisms by which plants recruit microbiota during plant acclimation to environmental stresses are unclear. Here, we investigated transcription pattern in three poplar genotypes, namely Populus davidiana × P. bolleana Loucne (SXY), P. deltoides × P. euramericana ‘Nanlin 895’ (NL895) and P. alba × P. glandulosa ‘84K’ (84K), and their effect on the rhizosphere microbial community under salinity. The results showed that SXY exhibited salt tolerance characterized by the best performance of photosynthesis and antioxidant system upon salt stress, while salt stress severely damaged the growth and membrane system of 84K. 16S rRNA sequencing revealed the lowest rhizobacterial community diversity associated with SXY compared to 84K and NL895, implying strong enrichment of certain bacterial taxa by the salt tolerant cultivar. Specifically, SXY recruited higher abundances of Hydrogenophaga and Pseudomonas . Furthermore, RNA‐seq analysis of roots combined with weighted gene co‐expression network analysis (WGCNA) identified module eigengene (ME)yellow, a module positively correlated to the SXY‐enriched OTUs. KEGG analysis revealed significant enrichment of lipid metabolic and amino acid biosynthetic pathways in MEyellow. Twenty‐four genes selected from the pathways enriched in MEyellow showed the highest expression levels in SXY. Our results suggest a “gene expression‐rhizosphere‐microbiota‐salt tolerance” regulatory process in the poplar under salinity and provide new insights into the mechanisms by which plants shape the soil microbiome to improve salt tolerance.
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Claims 9
Claim · model-written summary
SXY showed the best photosynthetic and antioxidant performance under salt stress.
- Material
- SXYe0
- Treatment
- salt stresse0
- Outcome
- performance of photosynthesis and antioxidant systeme0
- Direction
- beste0
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SXY exhibited salt tolerance characterized by the best performance of photosynthesis and antioxidant system upon salt stress”
t0“poplar”
Claim · model-written summary
Salt stress severely damaged growth and membranes of 84K.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salt stress severely damaged the growth and membrane system of 84K”
t0“poplar”
Claim · model-written summary
SXY had the lowest rhizobacterial diversity among the three genotypes.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest rhizobacterial community diversity associated with SXY compared to 84K and NL895”
t0“poplar”
Claim · model-written summary
SXY recruited higher abundances of Hydrogenophaga.
- Material
- SXYe0
- Interactor
- HydrogenophagaHydrogenophagae0symbiont
- Outcome
- abundances of Hydrogenophagae0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SXY recruited higher abundances of Hydrogenophaga and Pseudomonas”
t0“poplar”
Claim · model-written summary
SXY recruited higher abundances of Pseudomonas.
- Material
- SXYe0
- Interactor
- Pseudomonas
Pseudomonase0symbiont - Outcome
- Pseudomonase0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SXY recruited higher abundances of Hydrogenophaga and Pseudomonas”
t0“poplar”
Claim · model-written summary
MEyellow was positively correlated with SXY-enriched OTUs.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“module eigengene (ME)yellow, a module positively correlated to the SXY‐enriched OTUs.”
t0“poplar”
Claim · model-written summary
Lipid metabolic and amino acid biosynthetic pathways were significantly enriched in MEyellow.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant enrichment of lipid metabolic and amino acid biosynthetic pathways in MEyellow.”
t0“poplar”
Claim · model-written summary
Twenty-four selected pathway genes had their highest expression in SXY.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Twenty‐four genes selected from the pathways enriched in MEyellow showed the highest expression levels in SXY.”
t0“poplar”
Claim · model-written summary
Authors suggest a gene expression–rhizosphere microbiota–salt tolerance regulatory process.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a “gene expression‐rhizosphere‐microbiota‐salt tolerance” regulatory process in the poplar under salinity”
The same questions in other papers
salinity · growth · Populus (poplar)Results agree
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