Abstract
The plant hormone abscisic acid (ABA) accumulates in tea leaves under dehydration stress during the withering process. However, the mechanism underlying ABA biosynthesis regulation remains largely unclear. In the present study, we found increased expression of ABA biosynthesis genes under dehydration stress during postharvest processing of tea. Furthermore, dehydration stress promoted ABA accumulation by increasing histone acetylation of ABA anabolism genes but by decreasing the levels of histone H3 lysine 9 dimethylation and DNA methylation of ABA biosynthesis genes. We screened candidate regulators of histone deacetylation and DNA methylation under dehydration stress. Taken together, our results indicate a role for epigenetic modifications during postharvest processing of tea.
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Claims 5
Claim · model-written summary
ABA biosynthesis gene expression increased under dehydration during tea postharvest processing.
Verbatim
e0“increased expression of ABA biosynthesis genes under dehydration stress during postharvest processing of tea”
Claim · model-written summary
Dehydration increased ABA accumulation in tea.
- Taxon
- Teat0
- Treatment
- dehydration stresse0
- Gene
- ABA anabolism genese0
- Outcome
- ABA accumulatione0
- Direction
- promotede0
Not reportedComparator
Verbatim
e0“dehydration stress promoted ABA accumulation by increasing histone acetylation of ABA anabolism genes”
t0“Tea (Camellia sinensis)”
Claim · model-written summary
Dehydration increased histone acetylation of ABA anabolism genes in tea.
- Taxon
- Teat0
- Treatment
- dehydration stresse0
- Gene
- ABA anabolism genese0
- Outcome
- histone acetylatione0
- Direction
- increasinge0
Not reportedComparator
Verbatim
e0“dehydration stress promoted ABA accumulation by increasing histone acetylation of ABA anabolism genes”
t0“Tea (Camellia sinensis)”
Claim · model-written summary
Dehydration decreased histone H3 lysine 9 dimethylation in tea.
- Taxon
- Teat0
- Treatment
- dehydration stresse1
- Outcome
- levels of histone H3 lysine 9 dimethylatione0
- Direction
- decreasinge0
Not reportedComparator
Verbatim
e0“decreasing the levels of histone H3 lysine 9 dimethylation and DNA methylation of ABA biosynthesis genes”
e1“dehydration stress promoted ABA accumulation”
t0“Tea (Camellia sinensis)”
Claim · model-written summary
Dehydration decreased DNA methylation of ABA biosynthesis genes in tea.
- Taxon
- Teat0
- Treatment
- dehydration stresse1
- Gene
- ABA biosynthesis genese0
- Outcome
- DNA methylation of ABA biosynthesis genese0
- Direction
- decreasinge0
Not reportedComparator
Verbatim
e0“decreasing the levels of histone H3 lysine 9 dimethylation and DNA methylation of ABA biosynthesis genes”
e1“dehydration stress promoted ABA accumulation”
t0“Tea (Camellia sinensis)”
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