Abstract
In mature and young leaves of sunflower (Helianthus annuus L. cv. Catissol-01) plants grown in the greenhouse, photosynthetic rate, stomatal conductance, and transpiration rate declined during water stress independently of leaf age and recovered after 24-h rehydration. The intercellular CO2 concentration, chlorophyll (Chl) content, and photochemical activity were not affected by water stress. However, non-photochemical quenching increased in mature stressed leaves. Rehydration recovered the levels of non-photochemical quenching and increased the Fv/Fm in young leaves. Drought did not alter the total Chl content. However, the accumulation of proline under drought was dependent on leaf age: higher content of proline was found in young leaves. After 24 h of rehydration the content of proline returned to the same contents as in control plants.
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Claims 9
Claim · model-written summary
Water stress reduced photosynthetic rate, stomatal conductance and transpiration rate regardless of leaf age.
- Taxon
- sunflower
Helianthus annuuse0 - Material
- Catissol-01e0
- Organ / stage
- mature and young leavese0
- Treatment
- water stresse0
- Outcome
- photosynthetic rate, stomatal conductance, and transpiration ratee0
- Direction
- declinede0
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In mature and young leaves of sunflower (Helianthus annuus L. cv. Catissol-01) plants grown in the greenhouse, photosynthetic rate, stomatal conductance, and transpiration rate declined during water stress independently of leaf age”
Claim · model-written summary
Photosynthetic rate, stomatal conductance and transpiration rate recovered after 24 hours of rehydration.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- 24-h rehydratione0
- Outcome
- photosynthetic rate, stomatal conductance, and transpiration ratee0
- Direction
- recoverede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In mature and young leaves of sunflower (Helianthus annuus L. cv. Catissol-01) plants grown in the greenhouse, photosynthetic rate, stomatal conductance, and transpiration rate declined during water stress independently of leaf age and recovered after 24-h rehydration”
Claim · model-written summary
Water stress did not affect intercellular CO2 concentration, chlorophyll content or photochemical activity.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- water stresse0
- Outcome
- intercellular CO2 concentration, chlorophyll (Chl) content, and photochemical activitye0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower plants”
e0“The intercellular CO2 concentration, chlorophyll (Chl) content, and photochemical activity were not affected by water stress”
Claim · model-written summary
Non-photochemical quenching increased in mature stressed leaves.
- Taxon
- sunflowerHelianthus annuust0
- Organ / stage
- mature stressed leavese0
- Treatment
- stressede0
- Outcome
- non-photochemical quenchinge0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower plants”
e0“non-photochemical quenching increased in mature stressed leaves”
Claim · model-written summary
Rehydration restored non-photochemical quenching.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Rehydratione0
- Outcome
- levels of non-photochemical quenchinge0
- Direction
- recoverede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower plants”
e0“Rehydration recovered the levels of non-photochemical quenching”
Claim · model-written summary
Rehydration increased Fv/Fm in young leaves.
- Taxon
- sunflowerHelianthus annuust0
- Organ / stage
- young leavese0
- Treatment
- Rehydratione0
- Outcome
- Fv/Fme0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower plants”
e0“Rehydration recovered the levels of non-photochemical quenching and increased the Fv/Fm in young leaves”
Claim · model-written summary
Drought did not alter total chlorophyll content.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- Droughte0
- Outcome
- total Chl contente0
- Direction
- did not altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower plants”
e0“Drought did not alter the total Chl content”
Claim · model-written summary
Under drought, young leaves had higher proline content.
- Taxon
- sunflowerHelianthus annuust0
- Organ / stage
- young leavese0
- Treatment
- droughte0
- Outcome
- content of prolinee0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower plants”
e0“the accumulation of proline under drought was dependent on leaf age: higher content of proline was found in young leaves”
Claim · model-written summary
After 24 hours of rehydration, proline content returned to control levels.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 24 h of rehydratione0
- Outcome
- content of prolinee0
- Direction
- returned to the same contentse0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sunflower plants”
e0“After 24 h of rehydration the content of proline returned to the same contents as in control plants”
The same questions in other papers
drought · molecular: metabolites · Helianthus annuus (common sunflower)Positive and negative results
13 papers in the same direction as this paper · 6 in the opposite direction
- positive
- negative
- positive
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See all 20 papers →drought · physiology: photosynthesis · Helianthus annuus (common sunflower)Positive and negative results
21 papers in the same direction as this paper · 3 in the opposite direction
- positive
- no effect
- negative
21 papers more in this group
See all 25 papers →rewatering · physiology: photosynthesis · Helianthus annuus (common sunflower)Results agree
1 paper in the same direction as this paper
- positive
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.