Abstract
Rhizobium spp. is a well-known microbial plant biostimulant in non-legume crops, but little is known about the mechanisms by which rhizobia enhance crop productivity under drought stress. This work analyzed the mechanisms involved in drought stress alleviation exerted by Rhizobium leguminosarum strains in wheat plants under water shortage conditions. Two (LBM1210 and LET4910) of the four R . leguminosarum strains significantly improved the growth parameters (fresh and dry aerial weight, FW and DW, respectively), chlorophyll content, and relative water content (RWC) compared to a non-inoculated control under water stress, providing values similar to or even higher for FW (+4%) and RWC (+2.3%) than the non-inoculated and non-stressed control. Some other biochemical parameters and gene expression explain the observed drought stress alleviation, namely the reduction of MDA, H 2 O 2 (stronger when inoculating with LET4910), and ABA content (stronger when inoculating with LBM1210). In agreement with these results, inoculation with LET4910 downregulated DREB2 and CAT1 genes in plants under water deficiency and upregulated the CYP707A1 gene, while inoculation with LBM1210 strongly upregulated the CYP707A1 gene, which encodes an ABA catabolic enzyme. Conversely, from our results, ethylene metabolism did not seem to be involved in the alleviation of drought stress exerted by the two strains, as the expression of the CTR1 gene was very similar in all treatments and controls. The obtained results regarding the effect of the analyzed strains in alleviating drought stress are very relevant in the present situation of climate change, which negatively influences agricultural production.
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Claims 9
Claim · model-written summary
LBM1210 increased aerial fresh and dry weights, chlorophyll content, and relative water content under water stress.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- LBM1210e0
- Interactor
- R . leguminosarum
Rhizobium leguminosarume0symbiont - Outcome
- fresh and dry aerial weighte0
- Direction
- improvede0
- Comparator
- non-inoculated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two (LBM1210 and LET4910) of the four R . leguminosarum strains significantly improved the growth parameters (fresh and dry aerial weight, FW and DW, respectively), chlorophyll content, and relative water content (RWC) compared to a non-inoculated control under water stress, providing values similar to or even higher for FW (+4%) and RWC (+2.3%) than the non-inoculated and non-stressed control.”
t0“wheat”
Claim · model-written summary
LET4910 increased aerial fresh and dry weights, chlorophyll content, and relative water content under water stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- LET4910e0
- Interactor
- R . leguminosarumRhizobium leguminosarume0symbiont
- Outcome
- chlorophyll contente0
- Direction
- improvede0
- Comparator
- non-inoculated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two (LBM1210 and LET4910) of the four R . leguminosarum strains significantly improved the growth parameters (fresh and dry aerial weight, FW and DW, respectively), chlorophyll content, and relative water content (RWC) compared to a non-inoculated control under water stress, providing values similar to or even higher for FW (+4%) and RWC (+2.3%) than the non-inoculated and non-stressed control.”
t0“wheat”
Claim · model-written summary
Fresh weight was 4% higher than in the non-inoculated, non-stressed control.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- LBM1210 and LET4910e0
- Interactor
- R . leguminosarumRhizobium leguminosarume0symbiont
- Outcome
- FWe0
- Direction
- highere0
- Value
- +4%e0
- Comparator
- non-inoculated and non-stressed controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two (LBM1210 and LET4910) of the four R . leguminosarum strains significantly improved the growth parameters (fresh and dry aerial weight, FW and DW, respectively), chlorophyll content, and relative water content (RWC) compared to a non-inoculated control under water stress, providing values similar to or even higher for FW (+4%) and RWC (+2.3%) than the non-inoculated and non-stressed control.”
t0“wheat”
Claim · model-written summary
Relative water content was 2.3% higher than in the non-inoculated, non-stressed control.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- LBM1210 and LET4910e0
- Interactor
- R . leguminosarumRhizobium leguminosarume0symbiont
- Outcome
- RWCe0
- Direction
- highere0
- Value
- +2.3%e0
- Comparator
- non-inoculated and non-stressed controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two (LBM1210 and LET4910) of the four R . leguminosarum strains significantly improved the growth parameters (fresh and dry aerial weight, FW and DW, respectively), chlorophyll content, and relative water content (RWC) compared to a non-inoculated control under water stress, providing values similar to or even higher for FW (+4%) and RWC (+2.3%) than the non-inoculated and non-stressed control.”
t0“wheat”
Claim · model-written summary
Rhizobia inoculation reduced MDA, hydrogen peroxide and ABA content.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- inoculatinge0
- Outcome
- MDA, H 2 O 2e0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Some other biochemical parameters and gene expression explain the observed drought stress alleviation, namely the reduction of MDA, H 2 O 2 (stronger when inoculating with LET4910), and ABA content (stronger when inoculating with LBM1210).”
t0“wheat”
Claim · model-written summary
LET4910 downregulated DREB2 and CAT1 expression during water deficiency.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- inoculation with LET4910e0
- Interactor
- LET4910e0symbiont
- Gene
- DREB2 and CAT1e0
- Outcome
- DREB2 and CAT1 genese0
- Direction
- downregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In agreement with these results, inoculation with LET4910 downregulated DREB2 and CAT1 genes in plants under water deficiency and upregulated the CYP707A1 gene, while inoculation with LBM1210 strongly upregulated the CYP707A1 gene, which encodes an ABA catabolic enzyme.”
t0“wheat”
Claim · model-written summary
LET4910 upregulated CYP707A1 expression.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- inoculation with LET4910e0
- Interactor
- LET4910e0symbiont
- Gene
- CYP707A1e0
- Outcome
- CYP707A1 genee0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In agreement with these results, inoculation with LET4910 downregulated DREB2 and CAT1 genes in plants under water deficiency and upregulated the CYP707A1 gene, while inoculation with LBM1210 strongly upregulated the CYP707A1 gene, which encodes an ABA catabolic enzyme.”
t0“wheat”
Claim · model-written summary
LBM1210 strongly upregulated CYP707A1 expression.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- inoculation with LBM1210e0
- Interactor
- LBM1210e0symbiont
- Gene
- CYP707A1e0
- Outcome
- CYP707A1 genee0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In agreement with these results, inoculation with LET4910 downregulated DREB2 and CAT1 genes in plants under water deficiency and upregulated the CYP707A1 gene, while inoculation with LBM1210 strongly upregulated the CYP707A1 gene, which encodes an ABA catabolic enzyme.”
t0“wheat”
Claim · model-written summary
CTR1 expression was similar across treatments and controls, suggesting ethylene metabolism was not involved.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- two strainse0
- Interactor
- two strainse0symbiont
- Gene
- CTR1e0
- Outcome
- expression of the CTR1 genee0
- Direction
- very similare0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conversely, from our results, ethylene metabolism did not seem to be involved in the alleviation of drought stress exerted by the two strains, as the expression of the CTR1 gene was very similar in all treatments and controls.”
t0“wheat”
The same questions in other papers
inoculation · molecular: expression · Triticum aestivum (wheat)Positive and negative results
37 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- no effect
43 papers more in this group
See all 47 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.