Abstract
The design of a simple instrument to monitor leaf expansion in grasses is described. The instrument was used to compare the effects of water stress on leaf extension of two cultivars of maize and sorghum. The effect of withholding water for 3 days was an appreciable reduction in the rate of leaf expansion in both plants, particularly during the light period. In well-watered plants of both species, leaf extension continued at a steady rate even when leaf turgor fell to around 0.1 MPa. In water-stressed maize plants, leaf turgor during the light period fell to zero and leaf growth ceased. When turgor was restored, following stomatal closure, leaf extension resumed at a slow rate. In unwatered sorghum plants, leaf turgor remained at a value greater than 0.1 MPa but the rate of leaf extension was significantly reduced. The reduction in leaf turgor in the unwanted plants resulted partly from an increase in solute potential.
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Claims 10
Claim · model-written summary
Water withholding for three days reduced maize leaf expansion, especially in light.
- Treatment
- withholding water for 3 dayse0
- Outcome
- rate of leaf expansione0
- Direction
- reductione0
- Qualifier
- particularly during the light periode0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of withholding water for 3 days was an appreciable reduction in the rate of leaf expansion in both plants, particularly during the light period.”
t0“Maize and Sorghum”
Claim · model-written summary
Water withholding for three days reduced sorghum leaf expansion, especially in light.
- Treatment
- withholding water for 3 dayse0
- Outcome
- rate of leaf expansione0
- Direction
- reductione0
- Qualifier
- particularly during the light periode0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of withholding water for 3 days was an appreciable reduction in the rate of leaf expansion in both plants, particularly during the light period.”
t0“Maize and Sorghum”
Claim · model-written summary
Well-watered maize maintained steady leaf extension with turgor near 0.1 MPa.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In well-watered plants of both species, leaf extension continued at a steady rate even when leaf turgor fell to around 0.1 MPa.”
t0“Maize and Sorghum”
Claim · model-written summary
Well-watered sorghum maintained steady leaf extension with turgor near 0.1 MPa.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In well-watered plants of both species, leaf extension continued at a steady rate even when leaf turgor fell to around 0.1 MPa.”
t0“Maize and Sorghum”
Claim · model-written summary
Water-stressed maize leaf turgor fell to zero in light.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In water-stressed maize plants, leaf turgor during the light period fell to zero and leaf growth ceased.”
Claim · model-written summary
Water-stressed maize leaf growth ceased in light.
- Outcome
- leaf growth ceasede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In water-stressed maize plants, leaf turgor during the light period fell to zero and leaf growth ceased.”
Claim · model-written summary
After turgor restoration, maize leaf extension resumed slowly.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When turgor was restored, following stomatal closure, leaf extension resumed at a slow rate.”
t0“Maize”
Claim · model-written summary
Unwatered sorghum maintained turgor above 0.1 MPa.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In unwatered sorghum plants, leaf turgor remained at a value greater than 0.1 MPa”
Claim · model-written summary
Unwatered sorghum had significantly reduced leaf extension.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of leaf extension was significantly reduced.”
t0“Sorghum”
Claim · model-written summary
An increase in solute potential partly explained reduced leaf turgor in unwatered plants.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction in leaf turgor in the unwanted plants resulted partly from an increase in solute potential.”
t0“Maize and Sorghum”
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See all 385 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.