Abstract
Drought stress at the reproductive stage causes pollen sterility and grain loss in wheat (Triticum aestivum). Drought stress induces abscisic acid (ABA) biosynthesis genes in anthers and ABA accumulation in spikes of drought-sensitive wheat varieties. In contrast, drought-tolerant wheat accumulates lower ABA levels, which correlates with lower ABA biosynthesis and higher ABA catabolic gene expression (ABA 8'-hydroxylase). Wheat TaABA8'OH1 deletion lines accumulate higher spike ABA levels and are more drought sensitive. ABA treatment of the spike mimics the effect of drought, causing high levels of sterility. ABA treatment represses the anther cell wall invertase gene TaIVR1, and drought-tolerant lines appeared to be more sensitive to the effect of ABA. Drought-induced sterility shows similarity to cold-induced sterility in rice (Oryza sativa). In cold-stressed rice, the rate of ABA accumulation was similar in cold-sensitive and cold-tolerant lines during the first 8 h of cold treatment, but in the tolerant line, ABA catabolism reduced ABA levels between 8 and 16 h of cold treatment. The ABA biosynthesis gene encoding 9-cis-epoxycarotenoid dioxygenase in anthers is mainly expressed in parenchyma cells surrounding the vascular bundle of the anther. Transgenic rice lines expressing the wheat TaABA8'OH1 gene under the control of the OsG6B tapetum-specific promoter resulted in reduced anther ABA levels under cold conditions. The transgenic lines showed that anther sink strength (OsINV4) was maintained under cold conditions and that this correlated with improved cold stress tolerance. Our data indicate that ABA and ABA 8'-hydroxylase play an important role in controlling anther ABA homeostasis and reproductive stage abiotic stress tolerance in cereals.
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Claims 18
Claim · model-written summary
Drought causes pollen sterility and grain loss in wheat.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Drought stresse0
- Outcome
- pollen sterility and grain losse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress at the reproductive stage causes pollen sterility and grain loss in wheat (Triticum aestivum).”
Claim · model-written summary
Drought induces ABA biosynthesis genes in anthers of drought-sensitive wheat.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- antherse0
- Outcome
- abscisic acid (ABA) biosynthesis genese0
- Direction
- inducese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress induces abscisic acid (ABA) biosynthesis genes in anthers and ABA accumulation in spikes of drought-sensitive wheat varieties.”
Claim · model-written summary
Drought causes ABA accumulation in spikes of drought-sensitive wheat.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- spikese0
- Outcome
- ABA accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress induces abscisic acid (ABA) biosynthesis genes in anthers and ABA accumulation in spikes of drought-sensitive wheat varieties.”
Claim · model-written summary
Drought-tolerant wheat accumulates less ABA.
- Taxon
- wheatTriticum aestivume0
- Material
- drought-tolerant wheate0
- Outcome
- ABA levelse0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought-tolerant wheat accumulates lower ABA levels, which correlates with lower ABA biosynthesis and higher ABA catabolic gene expression (ABA 8'-hydroxylase).”
Claim · model-written summary
Lower ABA in drought-tolerant wheat correlates with lower ABA biosynthesis.
- Taxon
- wheatTriticum aestivume0
- Material
- drought-tolerant wheate0
- Outcome
- ABA biosynthesise0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought-tolerant wheat accumulates lower ABA levels, which correlates with lower ABA biosynthesis and higher ABA catabolic gene expression (ABA 8'-hydroxylase).”
Claim · model-written summary
Lower ABA in drought-tolerant wheat correlates with higher ABA catabolic gene expression.
- Taxon
- wheatTriticum aestivume0
- Gene
- ABA 8'-hydroxylasee0
- Outcome
- ABA catabolic gene expressione0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought-tolerant wheat accumulates lower ABA levels, which correlates with lower ABA biosynthesis and higher ABA catabolic gene expression (ABA 8'-hydroxylase).”
Claim · model-written summary
TaABA8'OH1 deletion wheat lines accumulate more spike ABA.
- Taxon
- WheatTriticum aestivume0
- Material
- TaABA8'OH1 deletion linese0
- Outcome
- spike ABA levelse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat TaABA8'OH1 deletion lines accumulate higher spike ABA levels and are more drought sensitive.”
Claim · model-written summary
TaABA8'OH1 deletion wheat lines are more drought sensitive.
- Taxon
- WheatTriticum aestivume0
- Material
- TaABA8'OH1 deletion linese0
- Outcome
- drought sensitivee0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat TaABA8'OH1 deletion lines accumulate higher spike ABA levels and are more drought sensitive.”
Claim · model-written summary
ABA treatment of wheat spikes caused high sterility.
- Taxon
- wheatTriticum aestivume1
- Treatment
- ABA treatment of the spikee0
- Outcome
- sterilitye0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA treatment of the spike mimics the effect of drought, causing high levels of sterility.”
e1“wheat (Triticum aestivum)”
Claim · model-written summary
ABA treatment repressed wheat TaIVR1.
- Taxon
- wheatTriticum aestivume1
- Treatment
- ABA treatmente0
- Gene
- TaIVR1e0
- Outcome
- anther cell wall invertase gene TaIVR1e0
- Direction
- repressese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA treatment represses the anther cell wall invertase gene TaIVR1”
e1“wheat (Triticum aestivum)”
Claim · model-written summary
Drought-tolerant wheat lines appeared more sensitive to ABA.
- Taxon
- wheatTriticum aestivume1
- Material
- drought-tolerant linese0
- Outcome
- sensitive to the effect of ABAe0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought-tolerant lines appeared to be more sensitive to the effect of ABA”
e1“wheat (Triticum aestivum)”
Claim · model-written summary
Drought-induced sterility in wheat resembled cold-induced sterility in rice.
- Taxon
- wheatTriticum aestivume1
- Outcome
- Drought-induced sterilitye0
- Comparator
- cold-induced sterility in ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought-induced sterility shows similarity to cold-induced sterility in rice (Oryza sativa).”
e1“wheat (Triticum aestivum)”
Claim · model-written summary
Cold-sensitive and cold-tolerant rice lines had similar ABA accumulation rates in the first 8 h.
- Taxon
- rice
Oryza sativae0 - Treatment
- cold treatmente0
- Outcome
- rate of ABA accumulatione0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In cold-stressed rice, the rate of ABA accumulation was similar in cold-sensitive and cold-tolerant lines during the first 8 h of cold treatment”
Claim · model-written summary
ABA catabolism lowered ABA in tolerant rice between 8 and 16 h of cold treatment.
- Taxon
- riceOryza sativae1
- Outcome
- ABA levelse0
- Direction
- reducede0
- Qualifier
- between 8 and 16 h of cold treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the tolerant line, ABA catabolism reduced ABA levels between 8 and 16 h of cold treatment.”
e1“cold-stressed rice”
Claim · model-written summary
The anther ABA biosynthesis gene is mainly expressed in parenchyma cells around the vascular bundle.
- Taxon
- riceOryza sativae1
- Gene
- 9-cis-epoxycarotenoid dioxygenasee0
- Outcome
- mainly expressed in parenchyma cells surrounding the vascular bundle of the anthere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ABA biosynthesis gene encoding 9-cis-epoxycarotenoid dioxygenase in anthers is mainly expressed in parenchyma cells surrounding the vascular bundle of the anther.”
e1“cold-stressed rice”
Claim · model-written summary
Transgenic rice expressing wheat TaABA8'OH1 had reduced anther ABA under cold.
- Taxon
- riceOryza sativae0
- Material
- Transgenic rice linese0
- Treatment
- expressing the wheat TaABA8'OH1 genee0
- Gene
- wheat TaABA8'OH1e0
- Outcome
- anther ABA levelse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transgenic rice lines expressing the wheat TaABA8'OH1 gene under the control of the OsG6B tapetum-specific promoter resulted in reduced anther ABA levels under cold conditions.”
Claim · model-written summary
Transgenic rice maintained anther sink strength in cold.
- Taxon
- riceOryza sativae1
- Material
- transgenic linese0
- Gene
- OsINV4e0
- Outcome
- anther sink strengthe0
- Direction
- maintainede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transgenic lines showed that anther sink strength (OsINV4) was maintained under cold conditions”
e1“Transgenic rice lines”
Claim · model-written summary
Maintained anther sink strength correlated with improved cold tolerance in transgenic rice.
- Taxon
- riceOryza sativae2
- Gene
- OsINV4e1
- Outcome
- cold stress tolerancee0
- Direction
- improvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this correlated with improved cold stress tolerance”
e1“The transgenic lines showed that anther sink strength (OsINV4) was maintained under cold conditions”
e2“Transgenic rice lines”
The same questions in other papers
(+)-abscisic acid · molecular: expression · Triticum aestivum (wheat)Positive and negative results
8 papers in the same direction as this paper · 34 in the opposite direction
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39 papers more in this group
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