Abstract
Plants co-ordinate information derived from many diverse external and internal signals to ensure appropriate control of gene expression under optimal and stress conditions. In this work, the relationships between catalase (CAT) and H2O2 during drought in wheat (Triticum aestivum L.) are studied. Drought-induced H2O2 accumulation correlated with decreases in soil water content and CO2 assimilation. Leaf H2O2 content increased even though total CAT activity doubled under severe drought conditions. Diurnal regulation of CAT1 and CAT2 mRNA abundance was apparent in all conditions and day/night CAT1 and CAT2 expression patterns were modified by mild and severe drought. The abundance of CAT1 transcripts was regulated by circadian controls that persisted in continuous darkness, while CAT2 was modulated by light. Drought decreased abundance, and modified the pattern, of CAT1 and CAT2 mRNAs. It was concluded that the complex regulation of CAT mRNA, particularly at the level of translation, allows precise control of leaf H2O2 accumulation.
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Claims 11
Claim · model-written summary
Drought-induced H2O2 accumulation correlated with declining soil water content.
- Taxon
- wheat
Triticum aestivume1 - Outcome
- H2O2 accumulatione0
- Direction
- decreasese0
- Setting
- soil water contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought-induced H2O2 accumulation correlated with decreases in soil water content and CO2 assimilation.”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Drought-induced H2O2 accumulation correlated with declining CO2 assimilation.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Droughte0
- Outcome
- CO2 assimilatione0
- Direction
- decreasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought-induced H2O2 accumulation correlated with decreases in soil water content and CO2 assimilation.”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Leaf H2O2 content increased under severe drought.
- Taxon
- wheatTriticum aestivume1
- Treatment
- severe drought conditionse0
- Outcome
- Leaf H2O2 contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf H2O2 content increased even though total CAT activity doubled under severe drought conditions.”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Total CAT activity doubled under severe drought.
- Taxon
- wheatTriticum aestivume1
- Treatment
- severe drought conditionse0
- Outcome
- total CAT activitye0
- Direction
- doublede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf H2O2 content increased even though total CAT activity doubled under severe drought conditions.”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
CAT1 and CAT2 mRNA abundance showed diurnal regulation in all conditions.
- Taxon
- wheatTriticum aestivume1
- Gene
- CAT1 and CAT2e0
- Outcome
- Diurnal regulation of CAT1 and CAT2 mRNA abundancee0
- Qualifier
- all conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Diurnal regulation of CAT1 and CAT2 mRNA abundance was apparent in all conditions”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Mild and severe drought modified day/night CAT1 and CAT2 expression patterns.
- Taxon
- wheatTriticum aestivume1
- Treatment
- mild and severe droughte0
- Gene
- CAT1 and CAT2e0
- Outcome
- day/night CAT1 and CAT2 expression patternse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“day/night CAT1 and CAT2 expression patterns were modified by mild and severe drought.”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
CAT1 transcript abundance was under circadian control that persisted in continuous darkness.
- Taxon
- wheatTriticum aestivume1
- Gene
- CAT1e0
- Outcome
- abundance of CAT1 transcriptse0
- Qualifier
- circadian controls that persisted in continuous darknesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The abundance of CAT1 transcripts was regulated by circadian controls that persisted in continuous darkness”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Light modulated CAT2 transcript abundance.
- Taxon
- wheatTriticum aestivume1
- Gene
- CAT2e0
- Outcome
- CAT2 was modulated by lighte0
- Qualifier
- lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CAT2 was modulated by light.”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Drought decreased CAT1 and CAT2 mRNA abundance.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Droughte0
- Gene
- CAT1 and CAT2e0
- Outcome
- abundance, and modified the pattern, of CAT1 and CAT2 mRNAse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought decreased abundance, and modified the pattern, of CAT1 and CAT2 mRNAs.”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Drought modified the CAT1 and CAT2 mRNA expression pattern.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Droughte0
- Gene
- CAT1 and CAT2e0
- Outcome
- pattern, of CAT1 and CAT2 mRNAse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought decreased abundance, and modified the pattern, of CAT1 and CAT2 mRNAs.”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
The authors conclude that CAT mRNA regulation, particularly translation, controls leaf H2O2 accumulation.
- Taxon
- wheatTriticum aestivume1
- Gene
- CATe0
- Outcome
- leaf H2O2 accumulatione0
- Qualifier
- particularly at the level of translatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“complex regulation of CAT mRNA, particularly at the level of translation, allows precise control of leaf H2O2 accumulation”
e1“wheat (Triticum aestivum L.)”
The same questions in other papers
drought · physiology: oxidative · Triticum aestivum (wheat)Positive and negative results
109 papers in the same direction as this paper · 18 in the opposite direction
- negative
- negative
- negative
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See all 128 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.