Abstract
Pot experiments were conducted to study the variation and physiological regulation of transpiration efficiency (TE) of four winter wheat (Triticum aestivum L.) varieties that are widely grown in different ecological regions in North China. Plants were grown under two soil moisture regimes, normal and drought stress. The results showed that under drought stress condition, both TE at plant level and TE at leaf level (TEl) increased significantly. The transpiration rate (Tr) was reduced more strongly than leaf net CO2 assimilation rate (Pn). The decline of Tr was mainly affected by stomatal conductance and the decline of Pn was affected by non-stomatal factors, which was confirmed by the decline in net photosynthetic oxygen evolution rate. The leaf soluble sugar content and proline content were significantly increased under drought stress. The stomatal density was increased and the stomatal length was reduced. These results led us to make the following conclusions: (1) Under drought stress, the increase in TEl appears to be regulated in two ways: via the stomata by regulating Tr, and independent of the stomata through regulation of Pn; regulation via the stomata was more sensitive; (2) Osmotic adjustment was closely correlated to the non-stomatal regulation, and stomatal aperture was closely correlated to the stomatal way.
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Claims 12
Claim · model-written summary
Under drought stress, transpiration efficiency at plant and leaf level increased significantly.
- Taxon
- winter wheat
Triticum aestivumt0 - Treatment
- drought stresse1
- Outcome
- TE at plant level and TE at leaf levele1
- Direction
- increasede1
- Comparator
- normale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e1“under drought stress condition, both TE at plant level and TE at leaf level (TEl) increased significantly”
e2“Plants were grown under two soil moisture regimes, normal and drought stress”
Claim · model-written summary
Under drought stress, transpiration rate was reduced more strongly than leaf net CO2 assimilation rate.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- drought stresse1
- Outcome
- transpiration rate (Tr)e3
- Direction
- reducede3
- Comparator
- leaf net CO2 assimilation rate (Pn)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e1“under drought stress condition, both TE at plant level and TE at leaf level (TEl) increased significantly”
e3“The transpiration rate (Tr) was reduced more strongly than leaf net CO2 assimilation rate (Pn)”
Claim · model-written summary
The decline of transpiration rate under drought is mainly explained by stomatal conductance.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- decline of Tre4
- Qualifier
- stomatal conductancee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e4“The decline of Tr was mainly affected by stomatal conductance”
Claim · model-written summary
The decline of photosynthesis (Pn) under drought is explained by non-stomatal factors.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- decline of Pne5
- Qualifier
- non-stomatal factorse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e5“the decline of Pn was affected by non-stomatal factors”
Claim · model-written summary
Under drought stress, the net photosynthetic oxygen evolution rate declined relative to normal moisture.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- drought stresse1
- Outcome
- net photosynthetic oxygen evolution ratee6
- Direction
- declinee6
- Comparator
- normale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e1“under drought stress condition, both TE at plant level and TE at leaf level (TEl) increased significantly”
e2“Plants were grown under two soil moisture regimes, normal and drought stress”
e6“which was confirmed by the decline in net photosynthetic oxygen evolution rate”
Claim · model-written summary
Under drought stress, leaf soluble sugar content and proline content increased significantly.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- drought stresse7
- Outcome
- leaf soluble sugar content and proline contente7
- Direction
- increasede7
- Comparator
- normale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e2“Plants were grown under two soil moisture regimes, normal and drought stress”
e7“The leaf soluble sugar content and proline content were significantly increased under drought stress”
Claim · model-written summary
Under drought stress, stomatal density increased.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- drought stresse1
- Outcome
- stomatal densitye3
- Direction
- increasede3
- Comparator
- normale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e1“under drought stress condition, both TE at plant level and TE at leaf level (TEl) increased significantly”
e2“Plants were grown under two soil moisture regimes, normal and drought stress”
e3“The stomatal density was increased and the stomatal length was reduced”
Claim · model-written summary
Under drought stress, stomatal length decreased.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- drought stresse1
- Outcome
- stomatal lengthe3
- Direction
- reducede3
- Comparator
- normale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e1“under drought stress condition, both TE at plant level and TE at leaf level (TEl) increased significantly”
e2“Plants were grown under two soil moisture regimes, normal and drought stress”
e3“The stomatal density was increased and the stomatal length was reduced”
Claim · model-written summary
The increase in TEl under drought is regulated via the stomata by regulating Tr and independently of the stomata through regulation of Pn.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- increase in TEle1
- Qualifier
- via the stomata by regulating Tre1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e1“the increase in TEl appears to be regulated in two ways: via the stomata by regulating Tr, and independent of the stomata through regulation of Pn”
Claim · model-written summary
Regulation of TEl via the stomata is more sensitive than non-stomatal regulation.
- Taxon
- winter wheatTriticum aestivumt0
- Organ / stage
- stomatae1
- Outcome
- regulation via the stomata was more sensitivee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e1“regulation via the stomata was more sensitive”
Claim · model-written summary
Osmotic adjustment is closely correlated with non-stomatal regulation.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- non-stomatal regulatione1
- Qualifier
- Osmotic adjustmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e1“Osmotic adjustment was closely correlated to the non-stomatal regulation”
Claim · model-written summary
Stomatal aperture is closely correlated with the stomatal way of regulation.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- stomatal waye1
- Qualifier
- stomatal aperturee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Physiological regulation of high transpiration efficiency in winter wheat under drought conditions”
e1“stomatal aperture was closely correlated to the stomatal way”
The same questions in other papers
drought · physiology: gas exchange · Triticum aestivum (wheat)Positive and negative results
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See all 76 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.