Abstract
Triticum aestivum (wheat) plants grown at a day∶night temperature of 18∶13 °C from anthesis were held as well watered controls, or subject to either a mild (large pot volume) or a more severe (small pot volume) water stress by withholding water from the time of anthesis. Extracts from the peduncle (enclosed by the flag leaf sheath) and the penultimate internode were prepared to determine the activities of fructan exohydrolase and acid invertase and to assess the level of hexose sugars, sucrose and fructans. Measurements were made of ear and individual grain weights and stem fresh weight and dry weight. Plant water relations at the time of each sampling were determined as the flag leaf water potential and the water content of individual organs. Water stress resulted in a shorter duration of kernel filling, smaller kernels at maturity and an earlier loss of stem weight. There was an increase in stem fructose and a fall in fructan level that preceded the loss of dry matter associated with water stress. Coincident with the early fall in fructan content under water stress there was a rise in both fructan exohydrolase and acid invertase in the internodes of stressed plants. This correlation suggests that the conversion of fructans to fructose might have resulted from enzyme induction associated with water stress, but as this conversion occurs before the major export of reserves from the stem it might be only indirectly related to changes in the demand for reserves.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Water stress shortened kernel filling duration.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- Water stresse0
- Outcome
- duration of kernel fillinge0
- Direction
- shortere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress resulted in a shorter duration of kernel filling”
t0“wheat”
Claim · model-written summary
Water stress produced smaller kernels at maturity.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- water stresst0
- Outcome
- kernels at maturitye0
- Direction
- smallere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“smaller kernels at maturity”
t0“wheat stems correlate with water stress”
Claim · model-written summary
Water stress caused earlier stem weight loss.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- water stresst0
- Outcome
- loss of stem weighte0
- Direction
- earliere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an earlier loss of stem weight”
t0“wheat stems correlate with water stress”
Claim · model-written summary
Stem fructose increased before stress-associated dry matter loss.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- water stresse0
- Outcome
- stem fructosee0
- Direction
- increasee0
- Qualifier
- preceded the loss of dry mattere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was an increase in stem fructose and a fall in fructan level that preceded the loss of dry matter associated with water stress.”
t0“wheat”
Claim · model-written summary
Stem fructan fell before stress-associated dry matter loss.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- water stresse0
- Outcome
- fructan levele0
- Direction
- falle0
- Qualifier
- preceded the loss of dry mattere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a fall in fructan level that preceded the loss of dry matter associated with water stress”
t0“wheat”
Claim · model-written summary
Fructan exohydrolase activity rose in internodes of stressed plants as fructan fell.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- internodese0
- Treatment
- water stresse0
- Gene
- fructan exohydrolasee0
- Outcome
- fructan exohydrolasee0
- Direction
- risee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coincident with the early fall in fructan content under water stress there was a rise in both fructan exohydrolase and acid invertase in the internodes of stressed plants.”
t0“wheat”
Claim · model-written summary
Acid invertase activity rose in internodes of stressed plants as fructan fell.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- internodese0
- Treatment
- water stresse0
- Gene
- acid invertasee0
- Outcome
- acid invertasee0
- Direction
- risee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coincident with the early fall in fructan content under water stress there was a rise in both fructan exohydrolase and acid invertase in the internodes of stressed plants.”
t0“wheat”
Claim · model-written summary
The authors suggest stress-associated enzyme induction may convert fructans to fructose.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- conversion of fructans to fructosee0
- Qualifier
- enzyme induction associated with water stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This correlation suggests that the conversion of fructans to fructose might have resulted from enzyme induction associated with water stress”
t0“wheat”
Claim · model-written summary
The authors suggest this conversion may be only indirectly related to changing reserve demand.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- changes in the demand for reservese0
- Qualifier
- only indirectly relatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it might be only indirectly related to changes in the demand for reserves”
t0“wheat”
The same questions in other papers
drought · growth · Triticum aestivum (wheat)Positive and negative results
344 papers in the same direction as this paper · 86 in the opposite direction
- positive
- negative
- negative
427 papers more in this group
See all 431 papers →drought · yield · Triticum aestivum (wheat)Positive and negative results
536 papers in the same direction as this paper · 95 in the opposite direction
- positive
- positive
- negative
628 papers more in this group
See all 632 papers →drought · phenology · Triticum aestivum (wheat)Results agree
16 papers in the same direction as this paper
- negative
- negative
- negative
13 papers more in this group
See all 17 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.