Abstract
Abstract Leaf growth is one of the most sensitive of plant processes to water deficits and is frequently inhibited in field crops. Plants were acclimated for 2 weeks under a moderate soil water deficit to determine whether the sensitivity of leaf growth could be altered by sustained exposure to low water potentials. Leaf growth under these conditions was less than in the controls because expansion occurred more slowly and for less of the day than in control leaves. However, acclimated leaves were able to grow at leaf water potentials (Ψ 1 ) low enough to inhibit growth completely in control plants. This ability was associated with osmotic adjustment and maintenance of turgor in the acclimated leaves. Upon rewatering, the growth of acclimated leaves increased but was less than the growth of controls, despite higher concentrations of cell solute and greater turgor in the acclimated leaves than in controls. Therefore, factors other than turgor and osmotic adjustment limited the growth of acclimated leaves at high ψ 1 Four potentially controlling factors were investigated and the results showed that acclimated leaves were less extensible and required more turgor to initiate growth than control leaves. The slow growth of acclimated leaves was not due to a decrease in the water potential gradient for water uptake, although changes in the apparent hydraulic conductivity for water transport could have occurred. It was concluded that leaf growth acclimated to low ψ 1 , by adjusting osmotically, and the concomitant maintenance of turgor permitted growth where none otherwise would occur. However, changes in the extensibility of the tissue and the turgor necessary to initiate growth caused generally slow growth in the acclimated leaves.
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Claims 11
Claim · model-written summary
Acclimated sunflower leaves grew less than control leaves under moderate soil water deficit.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- moderate soil water deficite2
- Outcome
- Leaf growthe1
- Direction
- lesse1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e1“Leaf growth under these conditions was less than in the controls because expansion occurred more slowly and for less of the day than in control leaves”
e2“Plants were acclimated for 2 weeks under a moderate soil water deficit”
Claim · model-written summary
Acclimated sunflower leaves were able to grow at low leaf water potentials that completely inhibit growth in control plants.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate soil water deficite2
- Outcome
- able to growe3
- Comparator
- control plantse4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e2“Plants were acclimated for 2 weeks under a moderate soil water deficit”
e3“acclimated leaves were able to grow at leaf water potentials”
e4“low enough to inhibit growth completely in control plants”
Claim · model-written summary
After rewatering, growth of acclimated sunflower leaves was less than that of controls.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- rewateringe5
- Outcome
- growth of acclimated leavese5
- Direction
- lesse5
- Comparator
- controlse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e5“Upon rewatering, the growth of acclimated leaves increased but was less than the growth of controls”
Claim · model-written summary
After rewatering, growth of acclimated sunflower leaves increased.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- rewateringe5
- Outcome
- growth of acclimated leavese5
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e5“Upon rewatering, the growth of acclimated leaves increased but was less than the growth of controls”
Claim · model-written summary
Acclimated sunflower leaves had higher concentrations of cell solute than controls.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate soil water deficite2
- Outcome
- concentrations of cell solutee6
- Direction
- highere6
- Comparator
- controlse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e2“Plants were acclimated for 2 weeks under a moderate soil water deficit”
e6“despite higher concentrations of cell solute and greater turgor in the acclimated leaves than in controls”
Claim · model-written summary
Acclimated sunflower leaves had greater turgor than controls.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate soil water deficite2
- Outcome
- turgore6
- Direction
- greatere6
- Comparator
- controlse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e2“Plants were acclimated for 2 weeks under a moderate soil water deficit”
e6“despite higher concentrations of cell solute and greater turgor in the acclimated leaves than in controls”
Claim · model-written summary
Acclimated sunflower leaves were less extensible than control leaves.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate soil water deficite2
- Outcome
- extensiblee7
- Direction
- lesse7
- Comparator
- control leavese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e2“Plants were acclimated for 2 weeks under a moderate soil water deficit”
e7“acclimated leaves were less extensible and required more turgor to initiate growth than control leaves”
Claim · model-written summary
Acclimated sunflower leaves required more turgor to initiate growth than control leaves.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- moderate soil water deficite2
- Outcome
- turgor to initiate growthe7
- Direction
- moree7
- Comparator
- control leavese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e2“Plants were acclimated for 2 weeks under a moderate soil water deficit”
e7“acclimated leaves were less extensible and required more turgor to initiate growth than control leaves”
Claim · model-written summary
The slow growth of acclimated sunflower leaves was not due to a decrease in the water potential gradient for water uptake.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- water potential gradient for water uptakee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e1“The slow growth of acclimated leaves was not due to a decrease in the water potential gradient for water uptake”
Claim · model-written summary
Osmotic adjustment with maintained turgor permitted growth in acclimated sunflower leaves at low water potential.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- permitted growthe1
- Qualifier
- the concomitant maintenance of turgore1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e1“the concomitant maintenance of turgor permitted growth where none otherwise would occur”
Claim · model-written summary
Changes in tissue extensibility and the turgor needed to start growth caused slow growth of acclimated sunflower leaves.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- slow growthe1
- Qualifier
- changes in the extensibility of the tissue and the turgor necessary to initiate growthe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Acclimation of leaf growth to low water potentials in sunflower”
e1“changes in the extensibility of the tissue and the turgor necessary to initiate growth caused generally slow growth in the acclimated leaves”
The same questions in other papers
drought · growth · Helianthus annuus (common sunflower)Results differ
49 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
55 papers more in this group
See all 59 papers →rewatering · growth · 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.