Abstract
The effects of water deficit induced by withholding water in soil pots were examined on processes related to photosynthesis and heat stability of PSII in wheat cultivars and in Aegilops species. Decrease in relative water content (RWC) of leaves resulted in fast and considerable stomatal closure and decrease in net photosynthetic CO2 fixation (A) in Ae. bicornis and in wheat cultivars, while in Ae. tauschii and Ae. speltoides stomatal conductance (gs) and A remained relatively high between 90 and 70% RWC. Parallel with this, A was limited by the CO2 diffusion to the intercellular spaces (stomatal limitation, Ls) even at a lower RWC in Ae. taushii and in Ae. speltoides, while a significant mesophyll limitation (Lm) was observed for Ae. bicornis and for wheat. On the other hand, drought stress resulted in a significant increase in the thermal stability of PSII in wheat and Aegilops genotypes. The results indicate that some genotypes of Ae. taushii and Ae. speltoides have better drought tolerance with satisfactory heat stability than wheat, making them appropriate for improving the heat tolerance of wheat to survive dry and hot periods in the field.
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Claims 15
Claim · model-written summary
Lower leaf water content caused rapid stomatal closure in Ae. bicornis.
Verbatim
e0“Decrease in relative water content (RWC) of leaves resulted in fast and considerable stomatal closure and decrease in net photosynthetic CO2 fixation (A) in Ae. bicornis and in wheat cultivars”
Claim · model-written summary
Lower leaf water content decreased CO2 fixation in Ae. bicornis.
Verbatim
e0“Decrease in relative water content (RWC) of leaves resulted in fast and considerable stomatal closure and decrease in net photosynthetic CO2 fixation (A) in Ae. bicornis and in wheat cultivars”
Claim · model-written summary
Lower leaf water content caused rapid stomatal closure in wheat cultivars.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Decrease in relative water content (RWC)e0
- Outcome
- stomatal closuree0
- Direction
- fast and considerablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Decrease in relative water content (RWC) of leaves resulted in fast and considerable stomatal closure and decrease in net photosynthetic CO2 fixation (A) in Ae. bicornis and in wheat cultivars”
Claim · model-written summary
Lower leaf water content decreased CO2 fixation in wheat cultivars.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Decrease in relative water content (RWC)e0
- Outcome
- net photosynthetic CO2 fixation (A)e0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Decrease in relative water content (RWC) of leaves resulted in fast and considerable stomatal closure and decrease in net photosynthetic CO2 fixation (A) in Ae. bicornis and in wheat cultivars”
Claim · model-written summary
Ae. tauschii retained relatively high stomatal conductance and CO2 fixation at 90–70% RWC.
Verbatim
e0“in Ae. tauschii and Ae. speltoides stomatal conductance (gs) and A remained relatively high between 90 and 70% RWC”
Claim · model-written summary
Ae. speltoides retained relatively high stomatal conductance and CO2 fixation at 90–70% RWC.
Verbatim
e0“in Ae. tauschii and Ae. speltoides stomatal conductance (gs) and A remained relatively high between 90 and 70% RWC”
Claim · model-written summary
CO2 diffusion limited photosynthesis even at lower RWC in Ae. taushii.
Verbatim
e0“A was limited by the CO2 diffusion to the intercellular spaces (stomatal limitation, Ls) even at a lower RWC in Ae. taushii and in Ae. speltoides”
Claim · model-written summary
CO2 diffusion limited photosynthesis even at lower RWC in Ae. speltoides.
Verbatim
e0“A was limited by the CO2 diffusion to the intercellular spaces (stomatal limitation, Ls) even at a lower RWC in Ae. taushii and in Ae. speltoides”
Claim · model-written summary
Ae. bicornis showed significant mesophyll limitation.
Verbatim
e0“a significant mesophyll limitation (Lm) was observed for Ae. bicornis and for wheat”
Claim · model-written summary
Wheat showed significant mesophyll limitation.
- Taxon
- wheatTriticum aestivume0
- Outcome
- mesophyll limitation (Lm)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant mesophyll limitation (Lm) was observed for Ae. bicornis and for wheat”
Claim · model-written summary
Drought significantly increased PSII thermal stability in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- drought stresse0
- Outcome
- thermal stability of PSIIe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress resulted in a significant increase in the thermal stability of PSII in wheat and Aegilops genotypes”
Claim · model-written summary
Drought significantly increased PSII thermal stability in Aegilops.
AegilopsNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress resulted in a significant increase in the thermal stability of PSII in wheat and Aegilops genotypes”
Claim · model-written summary
Some Ae. taushii genotypes had better drought tolerance and satisfactory heat stability than wheat.
Verbatim
e0“some genotypes of Ae. taushii and Ae. speltoides have better drought tolerance with satisfactory heat stability than wheat”
Claim · model-written summary
Some Ae. speltoides genotypes had better drought tolerance and satisfactory heat stability than wheat.
Verbatim
e0“some genotypes of Ae. taushii and Ae. speltoides have better drought tolerance with satisfactory heat stability than wheat”
Claim · model-written summary
The authors suggest Ae. taushii and Ae. speltoides for improving wheat heat tolerance in dry, hot field periods.
- Taxon
- wheatTriticum aestivume0
- Outcome
- improving the heat tolerance of wheat to survive dry and hot periods in the fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“making them appropriate for improving the heat tolerance of wheat to survive dry and hot periods in the field”
The same questions in other papers
drought · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results
40 papers in the same direction as this paper · 204 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
242 papers more in this group
See all 246 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.