Abstract
We studied participation of aquaporins in the regulation of leaf hydraulic conductivity and relationship of hydraulic conductivity with accumulation of ABA and stomatal closure during salt stress. Using the method of immunohistochemical localization we showed that salinity led to greater decline in the level of aquaporins in the region of the vascular leaf bundles of the more salt-tolerant Prairia cultivar, accompanied by a noticeable decrease in hydraulic conductivity of the leaf. In the less salt-tolerant plants of the Mikhailovsky cultivar, significant changes in the level of aquaporins under the influence of salt stress were not found. The degree of decrease in the hydraulic conductivity of the leaf in plants of two cultivars under the influence of salt stress correlated with a decrease in transpiration. Immunohistochemical localization of abscisic acid (ABA) in leaf cells showed that during salt stress this hormone accumulated in leaf mesophyll cells and stomata. The uptake of exogenous hormone from the nutrient solution and its entry into the leaf through the vascular bundles was accompanied by an increase in staining for aquaporins and the hydraulic conductivity of the leaves, which is characteristic of the ABA action. Differences in the localization of exogenous and endogenous hormones were obviously the cause of the opposite directions of changes in hydraulic conductivity: its increase under the influence of an exogenous ABA and a decrease - under the influence of salt stress. ABA concentration assessment in xylem showed the absence of its increase during salt stress, which explains the absence changes of staining for this hormone in the region of the leaf vascular bundles and indicates that accumulation of ABA in a short-term salt stress is not the result of its delivery from the roots, but the result of its synthesis in the shoot itself.
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Claims 8
Claim · model-written summary
Salinity greatly declined aquaporin levels in the leaf vascular bundles of the salt-tolerant Prairia cultivar.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Material
- Prairiae0
- Organ / stage
- vascular leaf bundlese0
- Treatment
- salinitye0
- Outcome
- level of aquaporins in the region of the vascular leaf bundlese0
- Direction
- greater declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“leaf cells of barley plants”
e0“salinity led to greater decline in the level of aquaporins in the region of the vascular leaf bundles of the more salt-tolerant Prairia cultivar, accompanied by a noticeable decrease in hydraulic conductivity of the leaf”
Claim · model-written summary
Salinity decreased leaf hydraulic conductivity in the Prairia cultivar.
- Taxon
- barleyHordeum vulgaret0
- Material
- Prairiae0
- Treatment
- salinitye0
- Outcome
- hydraulic conductivity of the leafe0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaf cells of barley plants”
e0“salinity led to greater decline in the level of aquaporins in the region of the vascular leaf bundles of the more salt-tolerant Prairia cultivar, accompanied by a noticeable decrease in hydraulic conductivity of the leaf”
Claim · model-written summary
Salt stress did not significantly change aquaporin levels in the Mikhailovsky cultivar.
- Taxon
- barleyHordeum vulgaret0
- Material
- Mikhailovskye1
- Treatment
- salt stresse1
- Outcome
- level of aquaporinse1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaf cells of barley plants”
e1“In the less salt-tolerant plants of the Mikhailovsky cultivar, significant changes in the level of aquaporins under the influence of salt stress were not found”
Claim · model-written summary
Decrease in leaf hydraulic conductivity under salt stress correlated with a decrease in transpiration in two cultivars.
- Taxon
- barleyHordeum vulgaret0
- Material
- two cultivarse2
- Treatment
- salt stresse2
- Outcome
- transpiratione2
- Direction
- decreasee2
- Qualifier
- degree of decrease in the hydraulic conductivity of the leafe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaf cells of barley plants”
e2“The degree of decrease in the hydraulic conductivity of the leaf in plants of two cultivars under the influence of salt stress correlated with a decrease in transpiration”
Claim · model-written summary
During salt stress, ABA accumulated in leaf mesophyll cells and stomata.
- Taxon
- barleyHordeum vulgaret0
- Organ / stage
- leaf mesophyll cells and stomatae3
- Treatment
- salt stresse3
- Outcome
- abscisic acid (ABA) in leaf cellse3
- Qualifier
- accumulatede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaf cells of barley plants”
e3“Immunohistochemical localization of abscisic acid (ABA) in leaf cells showed that during salt stress this hormone accumulated in leaf mesophyll cells and stomata”
Claim · model-written summary
Exogenous ABA increased aquaporin staining and leaf hydraulic conductivity.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- exogenous hormonee4
- Outcome
- hydraulic conductivity of the leavese4
- Direction
- increasee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaf cells of barley plants”
e4“The uptake of exogenous hormone from the nutrient solution and its entry into the leaf through the vascular bundles was accompanied by an increase in staining for aquaporins and the hydraulic conductivity of the leaves”
Claim · model-written summary
ABA concentration in xylem did not increase during salt stress.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- salt stresse6
- Outcome
- ABA concentration assessment in xyleme6
- Direction
- no_changeinferrede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaf cells of barley plants”
e6“ABA concentration assessment in xylem showed the absence of its increase during salt stress”
Claim · model-written summary
ABA accumulation during short-term salt stress results from synthesis in the shoot rather than delivery from the roots.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- salt stresse7
- Compound
- ABAe7
- Outcome
- accumulation of ABA in a short-term salt stresse7
- Qualifier
- result of its synthesis in the shoot itselfe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaf cells of barley plants”
e7“accumulation of ABA in a short-term salt stress is not the result of its delivery from the roots, but the result of its synthesis in the shoot itself”
The same questions in other papers
salinity · physiology: hormones · Hordeum vulgare (barley)Positive and negative results
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- positive
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salinity · soil: physics · Hordeum vulgare (barley)Results agree
6 papers in the same direction as this paper
- negative
- negative
- negative
3 papers more in this group
See all 7 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.