Abstract
Faba beans cv. Minica, Wierboon, Kristall, Felix, Optica and Alfred grown in the field in the Netherlands were irrigated to near field capacity, or water stressed, between the onset of flowering and the end of the growing season. Leaf water potential ( psi ), osmotic potential ( pi ) and turgor (P) were linearly related to leaf relative water content (RWC) with no significant differences between cultivars. At full turgor, pi hardly differed between water supply treatments, and the slopes of pi vs. RWC were not significantly different between treatments, indicating the absence of osmotic adjustment. Water supply did not affect the slope of P vs. RWC, and it was concluded that the faba bean cultivars lacked mechanisms to keep P high during water stress. Internode growth during flowering was 2-3 times greater in the well watered than in the stressed treatment. In greenhouse studies with cv. Minica, vegetative growth decreased linearly with decreasing P. Maximum stomatal conductance in the field decreased with psi from an estimated maximum level of 1.0 s/cm (at full turgidity and light intensity >800 micro E/msuperscript 2 per s), following a negative exponential curve. It was concluded that vegetative (expansive) growth decreases faster with decreasing P or psi than the stomatal conductance (and most probably faster than the rate of photosynthesis). It is suggested that this result may help to explain the positive effect of mild water stress on reproductive growth in faba beans. (Abstract retrieved from CAB Abstracts by CABI’s permission)
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Claims 9
Claim · model-written summary
Leaf water potential, osmotic potential and turgor were linearly related to relative leaf water content without cultivar differences.
- Taxon
- Faba beans
Vicia fabat0 - Material
- cultivarse0
- Organ / stage
- leafe0
- Outcome
- Leaf water potential ( psi ), osmotic potential ( pi ) and turgor (P)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf water potential ( psi ), osmotic potential ( pi ) and turgor (P) were linearly related to leaf relative water content (RWC) with no significant differences between cultivars.”
t0“Faba beans cv. Minica”
Claim · model-written summary
At full turgor, osmotic potential hardly differed between water treatments.
- Taxon
- Faba beansVicia fabat0
- Treatment
- water supply treatmentse0
- Outcome
- pie0
- Direction
- hardly differede0
- Qualifier
- At full turgore0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At full turgor, pi hardly differed between water supply treatments, and the slopes of pi vs. RWC were not significantly different between treatments, indicating the absence of osmotic adjustment.”
t0“Faba beans cv. Minica”
Claim · model-written summary
The osmotic potential–relative water content slopes did not differ significantly between water treatments.
- Taxon
- Faba beansVicia fabat0
- Treatment
- water supply treatmentse0
- Outcome
- slopes of pi vs. RWCe0
- Direction
- not significantly differente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At full turgor, pi hardly differed between water supply treatments, and the slopes of pi vs. RWC were not significantly different between treatments, indicating the absence of osmotic adjustment.”
t0“Faba beans cv. Minica”
Claim · model-written summary
Water supply did not affect the slope of turgor versus relative water content.
- Taxon
- Faba beansVicia fabat0
- Treatment
- Water supplye0
- Outcome
- slope of P vs. RWCe0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water supply did not affect the slope of P vs. RWC, and it was concluded that the faba bean cultivars lacked mechanisms to keep P high during water stress.”
t0“Faba beans cv. Minica”
Claim · model-written summary
Faba bean cultivars were interpreted to lack mechanisms for maintaining high turgor during water stress.
- Taxon
- Faba beansVicia fabat0
- Outcome
- keep P high during water stresse0
- Qualifier
- lacked mechanismse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water supply did not affect the slope of P vs. RWC, and it was concluded that the faba bean cultivars lacked mechanisms to keep P high during water stress.”
t0“Faba beans cv. Minica”
Claim · model-written summary
Internode growth during flowering was 2-3 times greater when well watered.
- Taxon
- Faba beansVicia fabat0
- Organ / stage
- Internodee0
- Treatment
- well waterede0
- Outcome
- Internode growthe0
- Direction
- greatere0
- Value
- 2-3 timese0
- Comparator
- stressed treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Internode growth during flowering was 2-3 times greater in the well watered than in the stressed treatment.”
t0“Faba beans cv. Minica”
Claim · model-written summary
Vegetative growth in Minica decreased linearly as turgor decreased.
- Taxon
- Faba beansVicia fabat0
- Material
- cv. Minicae0
- Outcome
- vegetative growthe0
- Direction
- decreasede0
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In greenhouse studies with cv. Minica, vegetative growth decreased linearly with decreasing P.”
t0“Faba beans cv. Minica”
Claim · model-written summary
Maximum field stomatal conductance decreased with leaf water potential from an estimated maximum of 1.0 s/cm.
- Taxon
- Faba beansVicia fabat0
- Outcome
- Maximum stomatal conductancee0
- Direction
- decreasede0
- Value
- 1.0 s/cme0
- Qualifier
- following a negative exponential curvee0
- Setting
- fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum stomatal conductance in the field decreased with psi from an estimated maximum level of 1.0 s/cm (at full turgidity and light intensity >800 micro E/msuperscript 2 per s), following a negative exponential curve.”
t0“Faba beans cv. Minica”
Claim · model-written summary
Expansive growth decreased faster than stomatal conductance as turgor or water potential declined.
- Taxon
- Faba beansVicia fabat0
- Outcome
- vegetative (expansive) growthe0
- Direction
- decreases fastere0
- Comparator
- stomatal conductancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It was concluded that vegetative (expansive) growth decreases faster with decreasing P or psi than the stomatal conductance (and most probably faster than the rate of photosynthesis).”
t0“Faba beans cv. Minica”
The same questions in other papers
irrigation · physiology: water · Vicia faba (faba bean)Positive and negative results
4 papers in the same direction as this paper · 18 in the opposite direction
- positive
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See all 23 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.