Abstract
Bacteria from the genera Paraburkholderia and Herbaspirillum can promote the growth of Sorghum bicolor, but the underlying mechanisms are not yet known. In a pot experiment, sorghum plants grown on sterilized substrate were inoculated with Paraburkholderia tropica strain IAC/BECa 135 and Herbaspirillum frisingense strain IAC/BECa 152 under phosphate-deficient conditions. These strains significantly increased Sorghum bicolor cultivar SRN-39 root and shoot biomass. Shotgun metagenomic analysis of the rhizosphere revealed successful colonization by both strains; however, the incidence of colonization was higher in plants inoculated with P. tropica strain IAC/BECa 135 than in those inoculated with H. frisingense strain IAC/BECa 152. Conversely, plants inoculated with H. frisingense strain IAC/BECa 152 showed the highest increase in biomass. Genomic analysis of the two inoculants implied a high degree of rhizosphere fitness of P. tropica strain IAC/BECa 135 through environmental signal processing, biofilm formation, and nutrient acquisition. Both genomes contained genes related to plant growth-promoting bacterial (PGPB) traits, including genes related to indole-3-acetate (IAA) synthesis, nitrogen fixation, nodulation, siderophore production, and phosphate solubilization, although the P. tropica strain IAC/BECa 135 genome contained a slightly more extensive repertoire. This study provides evidence that complementary mechanisms of growth promotion in Sorghum might occur, i.e., that P. tropica strain IAC/BECa 135 acts in the rhizosphere and increases the availability of nutrients, while H. frisingense strain IAC/BECa 152 influences plant hormone signaling. While the functional and taxonomic profiles of the rhizobiomes were similar in all treatments, significant differences in plant biomass were observed, indicating that the rhizobiome and the endophytic microbial community may play equally important roles in the complicated plant-microbial interplay underlying increased host plant growth.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Paraburkholderia tropica inoculation increased sorghum root and shoot biomass.
- Taxon
- Sorghum bicolor
Sorghum bicolore0 - Material
- cultivar SRN-39e0
- Treatment
- inoculated with Paraburkholderia tropica strain IAC/BECa 135e1
- Interactor
- Paraburkholderia tropica strain IAC/BECa 135Paraburkholderia tropicae1symbiont
- Outcome
- root and shoot biomasse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These strains significantly increased Sorghum bicolor cultivar SRN-39 root and shoot biomass.”
e1“inoculated with Paraburkholderia tropica strain IAC/BECa 135 and Herbaspirillum frisingense strain IAC/BECa 152 under phosphate-deficient conditions.”
Claim · model-written summary
Herbaspirillum frisingense inoculation increased sorghum root and shoot biomass.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Material
- cultivar SRN-39e0
- Treatment
- Herbaspirillum frisingense strain IAC/BECa 152e1
- Interactor
- Herbaspirillum frisingense strain IAC/BECa 152Herbaspirillum frisingensee1symbiont
- Outcome
- root and shoot biomasse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These strains significantly increased Sorghum bicolor cultivar SRN-39 root and shoot biomass.”
e1“inoculated with Paraburkholderia tropica strain IAC/BECa 135 and Herbaspirillum frisingense strain IAC/BECa 152 under phosphate-deficient conditions.”
Claim · model-written summary
Both inoculant strains colonized the sorghum rhizosphere.
- Outcome
- successful colonization by both strainse0
SorghumNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shotgun metagenomic analysis of the rhizosphere revealed successful colonization by both strains; however, the incidence of colonization was higher in plants inoculated with P. tropica strain IAC/BECa 135 than in those inoculated with H. frisingense strain IAC/BECa 152.”
t0“Sorghum”
Claim · model-written summary
Rhizosphere colonization was higher after P. tropica than H. frisingense inoculation.
- Treatment
- inoculated with P. tropica strain IAC/BECa 135e0
- Interactor
- P. tropica strain IAC/BECa 135Paraburkholderia tropicae0symbiont
- Outcome
- incidence of colonizatione0
- Direction
- highere0
- Comparator
- H. frisingense strain IAC/BECa 152e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the incidence of colonization was higher in plants inoculated with P. tropica strain IAC/BECa 135 than in those inoculated with H. frisingense strain IAC/BECa 152.”
t0“Sorghum”
Claim · model-written summary
H. frisingense inoculation yielded the highest sorghum biomass increase.
- Treatment
- inoculated with H. frisingense strain IAC/BECa 152e0
- Interactor
- H. frisingense strain IAC/BECa 152Herbaspirillum frisingensee0symbiont
- Outcome
- biomasse0
- Direction
- highest increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants inoculated with H. frisingense strain IAC/BECa 152 showed the highest increase in biomass.”
t0“Sorghum”
Claim · model-written summary
P. tropica genome analysis implied strong rhizosphere fitness via signaling, biofilms and nutrient acquisition.
- Interactor
- P. tropica strain IAC/BECa 135Paraburkholderia tropicae0symbiont
- Outcome
- rhizosphere fitness of P. tropica strain IAC/BECa 135e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genomic analysis of the two inoculants implied a high degree of rhizosphere fitness of P. tropica strain IAC/BECa 135 through environmental signal processing, biofilm formation, and nutrient acquisition.”
t0“Sorghum”
Claim · model-written summary
Both inoculant genomes carried plant growth promotion genes, with a slightly larger repertoire in P. tropica.
- Outcome
- genes related to plant growth-promoting bacterial (PGPB) traitse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both genomes contained genes related to plant growth-promoting bacterial (PGPB) traits, including genes related to indole-3-acetate (IAA) synthesis, nitrogen fixation, nodulation, siderophore production, and phosphate solubilization, although the P. tropica strain IAC/BECa 135 genome contained a slightly more extensive repertoire.”
t0“Sorghum”
Claim · model-written summary
Rhizobiome functional and taxonomic profiles were similar across treatments despite significant biomass differences.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While the functional and taxonomic profiles of the rhizobiomes were similar in all treatments, significant differences in plant biomass were observed”
t0“Sorghum”
Claim · model-written summary
Plant biomass differed significantly among treatments.
- Outcome
- plant biomasse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant differences in plant biomass were observed”
t0“Sorghum”
The same questions in other papers
inoculation · growth · Sorghum bicolor (sorghum)Results agree
24 papers in the same direction as this paper
- positive
- positive
- positive
21 papers more in this group
See all 25 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.