Abstract
Water deficit has devastating impacts on legume production, particularly with the current abrupt climate changes in arid environments. The application of plant growth-promoting rhizobacteria (PGPR) is an effective approach for producing natural nitrogen and attenuating the detrimental effects of drought stress. This study investigated the influence of inoculation with the PGPR Rhizobium leguminosarum biovar viciae (USDA 2435) and Pseudomonas putida (RA MTCC5279) solely or in combination on the physio-biochemical and agronomic traits of five diverse Vicia faba cultivars under well-watered (100% crop evapotranspiration [ETc]), moderate drought (75% ETc), and severe drought (50% ETc) conditions in newly reclaimed poor-fertility sandy soil. Drought stress substantially reduced the expression of photosynthetic pigments and water relation parameters. In contrast, antioxidant enzyme activities and osmoprotectants were considerably increased in plants under drought stress compared with those in well-watered plants. These adverse effects of drought stress reduced crop water productivity (CWP) and seed yield-related traits. However, the application of PGPR, particularly a consortium of both strains, improved these parameters and increased seed yield and CWP. The evaluated cultivars displayed varied tolerance to drought stress: Giza-843 and Giza-716 had the highest tolerance under well-watered and moderate drought conditions, whereas Giza-843 and Sakha-4 were more tolerant under severe drought conditions. Thus, co-inoculation of drought-tolerant cultivars with R. leguminosarum and P. putida enhanced their tolerance and increased their yield and CWP under water-deficit stress conditions. This study showed for the first time that the combined use of R. leguminosarum and P. putida is a promising and ecofriendly strategy for increasing drought tolerance in legume crops.
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Claims 8
Claim · model-written summary
Drought reduced photosynthetic pigments and water relation parameters.
- Taxon
- Vicia faba
Vicia fabat0 - Treatment
- Drought stresse0
- Outcome
- photosynthetic pigments and water relation parameterse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress substantially reduced the expression of photosynthetic pigments and water relation parameters”
t0“Vicia faba”
Claim · model-written summary
Drought increased antioxidant enzyme activities and osmoprotectants versus well-watered plants.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- drought stresse0
- Outcome
- antioxidant enzyme activities and osmoprotectantse0
- Direction
- increasede0
- Comparator
- well-watered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“antioxidant enzyme activities and osmoprotectants were considerably increased in plants under drought stress compared with those in well-watered plants”
t0“Vicia faba”
Claim · model-written summary
Drought reduced crop water productivity and seed yield-related traits.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- drought stresse0
- Outcome
- crop water productivity (CWP) and seed yield-related traitse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These adverse effects of drought stress reduced crop water productivity (CWP) and seed yield-related traits”
t0“Vicia faba”
Claim · model-written summary
PGPR, especially both strains together, improved the physiological parameters.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- PGPRe0
- Interactor
- PGPRe0symbiont
- Outcome
- these parameterse0
- Direction
- improvede0
- Qualifier
- particularly a consortium of both strainse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of PGPR, particularly a consortium of both strains, improved these parameters and increased seed yield and CWP”
t0“Vicia faba”
Claim · model-written summary
PGPR increased seed yield.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- PGPRe0
- Interactor
- PGPRe0symbiont
- Outcome
- seed yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of PGPR, particularly a consortium of both strains, improved these parameters and increased seed yield and CWP”
t0“Vicia faba”
Claim · model-written summary
PGPR increased crop water productivity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of PGPR, particularly a consortium of both strains, improved these parameters and increased seed yield and CWP”
t0“Vicia faba”
Claim · model-written summary
Giza-843 and Giza-716 had the highest tolerance under well-watered and moderate drought conditions.
- Taxon
- Vicia fabaVicia fabat0
- Material
- Giza-843 and Giza-716e0
- Outcome
- tolerancee0
- Direction
- higheste0
- Qualifier
- well-watered and moderate drought conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Giza-843 and Giza-716 had the highest tolerance under well-watered and moderate drought conditions”
t0“Vicia faba”
Claim · model-written summary
Giza-843 and Sakha-4 were more tolerant under severe drought.
- Taxon
- Vicia fabaVicia fabat0
- Material
- Giza-843 and Sakha-4e0
- Outcome
- tolerante0
- Direction
- more tolerante0
- Qualifier
- severe drought conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Giza-843 and Sakha-4 were more tolerant under severe drought conditions”
t0“Vicia faba”
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See all 9 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.