Abstract
The expansion of plant organs is inhibited by water deficits but the effect of ontogeny on growth sensitivity is not known. Therefore, growth responses of shoot organs (internodes, leaves, tendrils) of Vitis vinifera L. cv. White Riesling to developing water deficit were investigated under controlled environmental conditions. Growth of organs at a node position was asynchronous, with internode growth being more restricted than leaf and tendril growth in time (duration of growth) and space (number of node positions at which growth occurred). The timing of initial growth inhibition and final growth cessation caused by soil water deficits was identical in internodes, leaves, and tendrils. The degree of growth inhibition at low water potential was similar among organs, whether linear or volume changes were considered and whether the most rapidly expanding organs or organs of similar developmental stage were compared. In addition, the relative partitioning of growth among internodes, leaves, and tendrils along single shoots was unaltered when growth was inhibited by water deficits. Growth of each organ was inhibited initially at soil water potential of -0.065 MPa and ceased completely at -0.54 MPa. Therefore, it was concluded that the sensitivity of growth to water deficits did not differ among shoot organs. The region along the shoot in which organs expanded was reduced during water deficits. Similarly, the regions within organs in which growth occurred diminished as water deficits developed. Although growth was inhibited in all tissues, inhibition was complete in older tissues when some growth was maintained in younger tissues. Therefore, it was concluded that sensitivity of growth to water deficits increased with ontogeny.
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Claims 10
Claim · model-written summary
Internode growth occupied fewer times and node positions than leaf and tendril growth.
- Taxon
- Vitis vinifera L
Vitis viniferat0 - Organ / stage
- internodee0
- Outcome
- internode growthe0
- Direction
- more restrictede0
- Comparator
- leaf and tendril growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of organs at a node position was asynchronous, with internode growth being more restricted than leaf and tendril growth in time (duration of growth) and space (number of node positions at which growth occurred).”
t0“Vitis vinifera L”
Claim · model-written summary
Water deficits caused initial inhibition and final cessation at identical times in internodes, leaves and tendrils.
- Taxon
- Vitis vinifera LVitis viniferat0
- Treatment
- soil water deficitse0
- Outcome
- timing of initial growth inhibition and final growth cessatione0
- Direction
- identicale0
- Comparator
- internodes, leaves, and tendrilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The timing of initial growth inhibition and final growth cessation caused by soil water deficits was identical in internodes, leaves, and tendrils.”
t0“Vitis vinifera L”
Claim · model-written summary
At low water potential, growth inhibition was similar among grapevine organs.
- Taxon
- Vitis vinifera LVitis viniferat0
- Outcome
- degree of growth inhibitione0
- Direction
- similare0
- Qualifier
- at low water potentiale0
- Comparator
- organse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The degree of growth inhibition at low water potential was similar among organs, whether linear or volume changes were considered and whether the most rapidly expanding organs or organs of similar developmental stage were compared.”
t0“Vitis vinifera L”
Claim · model-written summary
Water deficits left relative growth partitioning among internodes, leaves and tendrils unaltered.
- Taxon
- Vitis vinifera LVitis viniferat0
- Treatment
- water deficitse0
- Outcome
- relative partitioning of growthe0
- Direction
- unalterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the relative partitioning of growth among internodes, leaves, and tendrils along single shoots was unaltered when growth was inhibited by water deficits.”
t0“Vitis vinifera L”
Claim · model-written summary
Growth inhibition began at soil water potential of -0.065 MPa.
- Taxon
- Vitis vinifera LVitis viniferat0
- Outcome
- Growth of each organe0
- Direction
- inhibited initiallye0
- Value
- -0.065 MPae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of each organ was inhibited initially at soil water potential of -0.065 MPa and ceased completely at -0.54 MPa.”
t0“Vitis vinifera L”
Claim · model-written summary
Growth ceased completely at soil water potential of -0.54 MPa.
- Taxon
- Vitis vinifera LVitis viniferat0
- Outcome
- Growth of each organe0
- Direction
- ceased completelye0
- Value
- -0.54 MPae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of each organ was inhibited initially at soil water potential of -0.065 MPa and ceased completely at -0.54 MPa.”
t0“Vitis vinifera L”
Claim · model-written summary
Water deficits reduced the shoot region in which organs expanded.
- Taxon
- Vitis vinifera LVitis viniferat0
- Treatment
- water deficitse0
- Outcome
- region along the shoot in which organs expandede0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The region along the shoot in which organs expanded was reduced during water deficits.”
t0“Vitis vinifera L”
Claim · model-written summary
Growth regions within organs diminished as water deficits developed.
- Taxon
- Vitis vinifera LVitis viniferat0
- Treatment
- water deficitse0
- Outcome
- regions within organs in which growth occurrede0
- Direction
- diminishede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the regions within organs in which growth occurred diminished as water deficits developed.”
t0“Vitis vinifera L”
Claim · model-written summary
Older tissues ceased growth completely under water deficit while younger tissues maintained some growth.
- Taxon
- Vitis vinifera LVitis viniferat0
- Organ / stage
- older tissuese0
- Outcome
- inhibitione0
- Direction
- completee0
- Comparator
- younger tissuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although growth was inhibited in all tissues, inhibition was complete in older tissues when some growth was maintained in younger tissues.”
t0“Vitis vinifera L”
Claim · model-written summary
The authors concluded that growth sensitivity to water deficits increased with ontogeny.
- Taxon
- Vitis vinifera LVitis viniferat0
- Organ / stage
- ontogenye0
- Outcome
- sensitivity of growth to water deficitse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sensitivity of growth to water deficits increased with ontogeny.”
t0“Vitis vinifera L”
The same questions in other papers
drought · growth · Vitis vinifera (wine grape)Positive and negative results
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