Abstract
The effect of drought stress on the non-structural carbohydrate (NSC) composition and water relations of the wheat (Triticum aestivum L.) stem has been investigated. Five separate parts of the stem were sampled: the unsheathed portion of the peduncle (Stem 1a), the sheathed portion of the peduncle (Stem 1b), the penultimate internode (Stem 2), the lower internodes (Stem 3+4) and the flag-leaf-pulvinus (pulvinus). The NSC was analysed as two fractions, an ethanol-soluble carbohydrate (ESC) fraction containing mono- and di-saccharides and some low molecular weight oligosaccharides, and a water-soluble carbohydrate (WSC) fraction containing mostly fructans and some high molecular weight oligosaccharides. In Stems 1b, 2 and 3 +4, the imposition of drought midway through grain filling resulted in a shift in soluble carbohydrate from the WSC to the ESC fraction indicating hydrolysis of fructans. In Stem 2 on day 29 of grain filling, the WSC/ESC ratio was 7.6 � 1.5 in well watered plants in contrast to 0.5 � 0.1 in droughted plants on day 30, even though NSC concentration did not differ. The NSC content of Stem la and the pulvinus increased threefold under drought, although levels were significantly lower than in the rest of the stem. The WSC/ESC ratio in these tissues was low com- pared to the rest of the stem but still declined noticeably under drought stress. Turgor (P) was fully maintained in Stem 2 and the pulvinus of droughted plants. Under drought, P in the pulvinus was maintained at higher levels (1.9-2.4 MPa) than in Stem 2 (0.8-1.2 MPa).
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 8
Claim · model-written summary
Drought shifted soluble carbohydrates from WSC to ESC in three wheat stem sections.
- Taxon
- wheat
Triticum aestivume0 - Organ / stage
- Stems 1b, 2 and 3 +4e1
- Treatment
- drought midway through grain fillinge1
- Outcome
- soluble carbohydratee1
- Direction
- shifte1
- Qualifier
- hydrolysis of fructanse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat (Triticum aestivum L.) stem”
e1“In Stems 1b, 2 and 3 +4, the imposition of drought midway through grain filling resulted in a shift in soluble carbohydrate from the WSC to the ESC fraction indicating hydrolysis of fructans.”
Claim · model-written summary
Stem 2 WSC/ESC ratio was lower under drought than watering.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- Stem 2e1
- Treatment
- droughted plantse1
- Outcome
- WSC/ESC ratioe1
- Direction
- lowerinferrede1
- Value
- 0.5 � 0.1e1
- Qualifier
- 7.6 � 1.5e1
- Comparator
- well watered plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat (Triticum aestivum L.) stem”
e1“In Stem 2 on day 29 of grain filling, the WSC/ESC ratio was 7.6 � 1.5 in well watered plants in contrast to 0.5 � 0.1 in droughted plants on day 30”
Claim · model-written summary
Stem 2 NSC concentration did not differ despite drought.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- steme0
- Outcome
- NSC concentratione1
- Direction
- did not differe1
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat (Triticum aestivum L.) stem”
e1“even though NSC concentration did not differ.”
Claim · model-written summary
Stem 1a and pulvinus NSC content tripled under drought.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- Stem la and the pulvinuse1
- Treatment
- droughte1
- Outcome
- NSC contente1
- Direction
- increasede1
- Value
- threefolde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat (Triticum aestivum L.) stem”
e1“The NSC content of Stem la and the pulvinus increased threefold under drought”
Claim · model-written summary
Stem 1a and pulvinus NSC content remained lower than the rest of the stem.
- Taxon
- wheatTriticum aestivume0
- Outcome
- levelse1
- Direction
- lowere1
- Comparator
- rest of the steme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat (Triticum aestivum L.) stem”
e1“although levels were significantly lower than in the rest of the stem.”
Claim · model-written summary
WSC/ESC ratio in these tissues was low and declined with drought.
- Taxon
- wheatTriticum aestivume0
- Treatment
- drought stresse1
- Outcome
- WSC/ESC ratioe1
- Direction
- declinede1
- Comparator
- rest of the steme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat (Triticum aestivum L.) stem”
e1“The WSC/ESC ratio in these tissues was low com- pared to the rest of the stem but still declined noticeably under drought stress.”
Claim · model-written summary
Turgor was maintained in Stem 2 and pulvinus during drought.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- Stem 2 and the pulvinuse1
- Treatment
- droughted plantse1
- Outcome
- Turgor (P) was fully maintainede1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat (Triticum aestivum L.) stem”
e1“Turgor (P) was fully maintained in Stem 2 and the pulvinus of droughted plants.”
Claim · model-written summary
Under drought, pulvinus turgor exceeded Stem 2 turgor.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- pulvinuse1
- Outcome
- P in the pulvinuse1
- Direction
- highere1
- Value
- 1.9-2.4 MPae1
- Qualifier
- 0.8-1.2 MPae1
- Comparator
- Stem 2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat (Triticum aestivum L.) stem”
e1“Under drought, P in the pulvinus was maintained at higher levels (1.9-2.4 MPa) than in Stem 2 (0.8-1.2 MPa).”
The same questions in other papers
drought · quality: sugar starch · Triticum aestivum (wheat)Results differ
40 papers in the same direction as this paper · 11 in the opposite direction
- negative
- negative
- positive
48 papers more in this group
See all 52 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.