Abstract
SUMMARY The effects of periods of drought occurring during different phases of reproductive growth of faba bean ( Vicia faba L.) cv. Xichang Dabai on dry matter production, seed yield, photosynthetic rate and stomatal size were investigated in pot experiments in 1987/88 and 1988/89 at Xichang Agricultural College, China. Six treatments were imposed: no drought (control), and drought from floral initiation to first flowering (D1), from first flowering to full bloom (D2), from full bloom to initiation of podset (D3), from initiation of pod-set to full pod-set (D4), and from full pod-set to maturity (D5). Photosynthetic rate, chlorophyll content, leaf area, stomatal pore breadth, biomass and seed yield were decreased by all drought treatments, but stomatal frequency and respiratory rate were increased. The light saturation point for photosynthesis was decreased from 950 µmol/m2/s (PAR) to 570 µmol/m2/s (PAR) in leaves from drought-stressed plants, which also showed maximum stomatal opening between 08.00 and 11.00 h followed by progressive stomatal closure. The response of faba bean to drought varied during the different reproductive growth stages. Plants subjected to drought at stage D1 were less affected than those at other stages, while plants at stage D4 were most sensitive to drought, which reduced seed yield by c. 45% in 1987/88 and by c. 43% in 1988/89 relative to the control plants, suggesting that stage D4 is the stage of reproductive development most sensitive to soil drought in the faba bean.
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Claims 8
Claim · model-written summary
Drought decreased photosynthetic rate, chlorophyll content and leaf area of faba bean.
- Taxon
- Vicia faba
Vicia fabat0 - Treatment
- drought treatmentse1
- Outcome
- Photosynthetic rate, chlorophyll content, leaf areae1
- Direction
- decreasede1
- Setting
- pot experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soil drought during the generative development phase of faba bean (Vicia faba)”
e0“pot experiments in 1987/88 and 1988/89 at Xichang Agricultural College, China”
e1“Photosynthetic rate, chlorophyll content, leaf area, stomatal pore breadth, biomass and seed yield were decreased by all drought treatments”
Claim · model-written summary
Drought decreased stomatal pore breadth, biomass and seed yield of faba bean.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- drought treatmentse1
- Outcome
- stomatal pore breadth, biomass and seed yielde1
- Direction
- decreasede1
- Setting
- pot experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soil drought during the generative development phase of faba bean (Vicia faba)”
e0“pot experiments in 1987/88 and 1988/89 at Xichang Agricultural College, China”
e1“Photosynthetic rate, chlorophyll content, leaf area, stomatal pore breadth, biomass and seed yield were decreased by all drought treatments”
Claim · model-written summary
Drought increased stomatal frequency and respiratory rate of faba bean.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- drought treatmentse1
- Outcome
- stomatal frequency and respiratory ratee2
- Direction
- were increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soil drought during the generative development phase of faba bean (Vicia faba)”
e1“Photosynthetic rate, chlorophyll content, leaf area, stomatal pore breadth, biomass and seed yield were decreased by all drought treatments”
e2“but stomatal frequency and respiratory rate were increased”
Claim · model-written summary
Drought decreased the light saturation point for photosynthesis from 950 to 570 µmol/m2/s (PAR).
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- drought-stressed plantse3
- Outcome
- light saturation point for photosynthesise3
- Direction
- decreasede3
- Value
- 950 µmol/m2/s (PAR) to 570 µmol/m2/s (PAR)e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soil drought during the generative development phase of faba bean (Vicia faba)”
e3“The light saturation point for photosynthesis was decreased from 950 µmol/m2/s (PAR) to 570 µmol/m2/s (PAR) in leaves from drought-stressed plants”
Claim · model-written summary
Drought-stressed faba bean leaves showed maximum stomatal opening between 08.00 and 11.00 h, then progressive closure.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- drought-stressed plantse3
- Outcome
- maximum stomatal opening between 08.00 and 11.00 he4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soil drought during the generative development phase of faba bean (Vicia faba)”
e3“The light saturation point for photosynthesis was decreased from 950 µmol/m2/s (PAR) to 570 µmol/m2/s (PAR) in leaves from drought-stressed plants”
e4“which also showed maximum stomatal opening between 08.00 and 11.00 h followed by progressive stomatal closure”
Claim · model-written summary
Drought at stage D1 affected faba bean less than drought at other stages.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- stage D1e5
- Treatment
- drought at stage D1e5
- Outcome
- affectede5
- Direction
- less affectede5
- Comparator
- other stagese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soil drought during the generative development phase of faba bean (Vicia faba)”
e5“Plants subjected to drought at stage D1 were less affected than those at other stages”
Claim · model-written summary
Drought at stage D4 reduced faba bean seed yield by c. 45% relative to control plants in 1987/88.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- stage D4e6
- Treatment
- droughte6
- Outcome
- seed yielde6
- Direction
- reducede6
- Value
- c. 45%e6
- Qualifier
- 1987/88e6
- Comparator
- control plantse6
- Setting
- pot experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soil drought during the generative development phase of faba bean (Vicia faba)”
e0“pot experiments in 1987/88 and 1988/89 at Xichang Agricultural College, China”
e6“plants at stage D4 were most sensitive to drought, which reduced seed yield by c. 45% in 1987/88 and by c. 43% in 1988/89 relative to the control plants”
Claim · model-written summary
Drought at stage D4 reduced faba bean seed yield by c. 43% relative to control plants in 1988/89.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- stage D4e6
- Treatment
- droughte6
- Outcome
- seed yielde6
- Direction
- reducede6
- Value
- c. 43%e6
- Qualifier
- 1988/89e6
- Comparator
- control plantse6
- Setting
- pot experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soil drought during the generative development phase of faba bean (Vicia faba)”
e0“pot experiments in 1987/88 and 1988/89 at Xichang Agricultural College, China”
e6“plants at stage D4 were most sensitive to drought, which reduced seed yield by c. 45% in 1987/88 and by c. 43% in 1988/89 relative to the control plants”
The same questions in other papers
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See all 40 papers →drought · physiology: photosynthesis · Vicia faba (faba bean)Results agree
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- negative
- negative
- negative
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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.