Abstract
L.) production in the tropics typically occurs in rainfed systems on marginal lands where yields are low, primarily as a consequence of drought and low phosphorus (P) availability in soil. This study aimed to investigate the physiological and chemical responses of 12 bush bean genotypes for adaptation to individual and combined stress factors of drought and low P availability. Water stress and P deficiency, both individually and combined, decreased seed weight and aboveground biomass by ∼80%. Water deficit and P deficiency decreased photosynthesis and stomatal conductance during plant development. Maximum rates of carboxylation, electron transport, and triose phosphate utilization were superior for two common bean genotypes (SEF60 and NCB226) that are better adapted to combined stress conditions of water deficit and low P compared to the commercial check (DOR390). In response to water deficit treatment, carbon isotope fractionation in the leaf tissue decreased at all developmental stages. Within the soluble leaf fraction, combined water deficit and low P, led to significant changes in the concentration of key nutrients and amino acids, whereas no impact was detected in the seed. Our results suggest that common bean genotypes have a degree of resilience in yield development, expressed in traits such as pod harvest index, and conservation of nutritional content in the seed. Further exploration of the chemical and physiological traits identified here will enhance the resilience of common bean production systems in the tropics.
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Claims 9
Claim · model-written summary
Water stress and P deficiency reduced seed weight by about 80%.
Not reportedTaxonComparator
Verbatim
e0“Water stress and P deficiency, both individually and combined, decreased seed weight and aboveground biomass by ∼80%.”
Claim · model-written summary
Water stress and P deficiency reduced aboveground biomass by about 80%.
Not reportedTaxonComparator
Verbatim
e0“Water stress and P deficiency, both individually and combined, decreased seed weight and aboveground biomass by ∼80%.”
Claim · model-written summary
Water deficit and P deficiency decreased photosynthesis and stomatal conductance.
- Treatment
- Water deficit and P deficiencye0
- Outcome
- photosynthesis and stomatal conductancee0
- Direction
- decreasede0
Not reportedTaxonComparator
Verbatim
e0“Water deficit and P deficiency decreased photosynthesis and stomatal conductance during plant development.”
Claim · model-written summary
SEF60 had superior carboxylation, electron transport and triose phosphate utilization under combined stress.
- Taxon
- common bean
Phaseolus vulgarise0 - Material
- SEF60e0
- Treatment
- combined stress conditions of water deficit and low Pe0
- Outcome
- Maximum rates of carboxylation, electron transport, and triose phosphate utilizatione0
- Direction
- superiore0
- Comparator
- DOR390e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum rates of carboxylation, electron transport, and triose phosphate utilization were superior for two common bean genotypes (SEF60 and NCB226) that are better adapted to combined stress conditions of water deficit and low P compared to the commercial check (DOR390).”
Claim · model-written summary
NCB226 had superior carboxylation, electron transport and triose phosphate utilization under combined stress.
- Taxon
- common beanPhaseolus vulgarise0
- Material
- NCB226e0
- Treatment
- combined stress conditions of water deficit and low Pe0
- Outcome
- Maximum rates of carboxylation, electron transport, and triose phosphate utilizatione0
- Direction
- superiore0
- Comparator
- DOR390e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum rates of carboxylation, electron transport, and triose phosphate utilization were superior for two common bean genotypes (SEF60 and NCB226) that are better adapted to combined stress conditions of water deficit and low P compared to the commercial check (DOR390).”
Claim · model-written summary
Water deficit reduced leaf carbon isotope fractionation at all stages.
- Organ / stage
- leaf tissuee0
- Treatment
- water deficit treatmente0
- Outcome
- carbon isotope fractionatione0
- Direction
- decreasede0
Not reportedTaxonComparator
Verbatim
e0“In response to water deficit treatment, carbon isotope fractionation in the leaf tissue decreased at all developmental stages.”
Claim · model-written summary
Combined water deficit and low P significantly altered soluble leaf nutrient and amino acid concentrations.
- Organ / stage
- soluble leaf fractione0
- Treatment
- combined water deficit and low Pe0
- Outcome
- concentration of key nutrients and amino acidse0
Not reportedTaxonComparatorDirection
Verbatim
e0“Within the soluble leaf fraction, combined water deficit and low P, led to significant changes in the concentration of key nutrients and amino acids”
Claim · model-written summary
Combined stress did not affect seed nutrient and amino acid concentrations.
- Outcome
- seede0
Not reportedTaxonTreatmentComparatorDirection
Verbatim
e0“whereas no impact was detected in the seed.”
Claim · model-written summary
Common bean genotypes showed some resilience in yield development and conserved seed nutrition.
- Taxon
- common beanPhaseolus vulgarise0
- Organ / stage
- seede0
- Outcome
- resilience in yield developmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our results suggest that common bean genotypes have a degree of resilience in yield development, expressed in traits such as pod harvest index, and conservation of nutritional content in the seed.”
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