Abstract
The leaf water potential, gas exchange and chlorophyll fluorescence were evaluated in five common bean (Phaseolus vulgaris) genotypes A222, A320, BAT477, Carioca and Ouro Negro subjected to moderate water deficit. At the maximum water deficit (10 d of water withholding), the leaf water potential of genotypes A320 and A222 was higher (-0.35 and -0.50 MPa) when compared to the other genotypes (-0.67 to -0.77 MPa). The stomatal conductance and net photosynthetic rate were significantly reduced in all genotypes due to the water deficit. The greater reduction in stomatal conductance of A320 under drought resulted in high intrinsic water use efficiency. Mild water deficit affected the photochemical apparatus in bean genotypes probably by down-regulation since plants did not show photoinhibition. The photochemical apparatus of A222 and A320 genotypes was more sensitive to drought stress, showing reduced apparent electron transport even after the recovery of plant water status. On the other hand, even after 10 d of water withholding, the maximum efficiency of photosystem 2 was not affected, what suggest efficiency of the photoprotection mechanisms.
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Claims 10
Claim · model-written summary
A320 retained higher leaf water potential under deficit.
- Taxon
- common bean
Phaseolus vulgarist0 - Material
- A320e0
- Outcome
- leaf water potentiale0
- Direction
- highere0
- Value
- -0.35e0
- Comparator
- other genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“leaf water potential of genotypes A320 and A222 was higher (-0.35 and -0.50 MPa) when compared to the other genotypes (-0.67 to -0.77 MPa)”
Claim · model-written summary
A222 retained higher leaf water potential under deficit.
- Taxon
- common beanPhaseolus vulgarist0
- Material
- A222e0
- Outcome
- leaf water potentiale0
- Direction
- highere0
- Value
- -0.50 MPae0
- Comparator
- other genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“leaf water potential of genotypes A320 and A222 was higher (-0.35 and -0.50 MPa) when compared to the other genotypes (-0.67 to -0.77 MPa)”
Claim · model-written summary
Water deficit reduced stomatal conductance in all genotypes.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- water deficite0
- Outcome
- stomatal conductancee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“The stomatal conductance and net photosynthetic rate were significantly reduced in all genotypes due to the water deficit.”
Claim · model-written summary
Water deficit reduced net photosynthetic rate in all genotypes.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- water deficite0
- Outcome
- net photosynthetic ratee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“The stomatal conductance and net photosynthetic rate were significantly reduced in all genotypes due to the water deficit.”
Claim · model-written summary
A320 had high intrinsic water use efficiency under drought.
- Taxon
- common beanPhaseolus vulgarist0
- Material
- A320e0
- Outcome
- intrinsic water use efficiencye0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“The greater reduction in stomatal conductance of A320 under drought resulted in high intrinsic water use efficiency.”
Claim · model-written summary
Mild water deficit affected the photochemical apparatus, probably by down regulation.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- Mild water deficite0
- Outcome
- photochemical apparatuse0
- Qualifier
- probably by down-regulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“Mild water deficit affected the photochemical apparatus in bean genotypes probably by down-regulation since plants did not show photoinhibition.”
Claim · model-written summary
Plants showed no photoinhibition under mild deficit.
- Taxon
- common beanPhaseolus vulgarist0
- Outcome
- did not show photoinhibitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“plants did not show photoinhibition”
Claim · model-written summary
A222 showed reduced apparent electron transport after water status recovered.
- Taxon
- common beanPhaseolus vulgarist0
- Material
- A222e0
- Outcome
- apparent electron transporte0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“The photochemical apparatus of A222 and A320 genotypes was more sensitive to drought stress, showing reduced apparent electron transport even after the recovery of plant water status.”
Claim · model-written summary
A320 showed reduced apparent electron transport after water status recovered.
- Taxon
- common beanPhaseolus vulgarist0
- Material
- A320e0
- Outcome
- apparent electron transporte0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“The photochemical apparatus of A222 and A320 genotypes was more sensitive to drought stress, showing reduced apparent electron transport even after the recovery of plant water status.”
Claim · model-written summary
Ten days of withholding did not affect maximum photosystem 2 efficiency.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- 10 d of water withholdinge0
- Outcome
- maximum efficiency of photosystem 2e0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“even after 10 d of water withholding, the maximum efficiency of photosystem 2 was not affected”
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See all 42 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.