Abstract
ABSTRACT Drought stress is one of the major challenges for agriculture worldwide. The cultivated potato is a tetraploid tuber propagated crop that is sensitive to drought stress. We revealed that the tuber yield in two subsequent tuber progeny generations strongly depended on the cultivar and drought‐induced memory. Upon non‐stressed conditions, drought stress memory caused significant tuber yield losses in the first tuber progeny generation. In the second stress‐free tuber generation, partial memory resetting was observed. DNA methylation has been shown to play a significant role in plant stress responses. Information on stress memory in crop plants is still limited. This is the first report on alterations in drought‐induced DNA methylation levels in the long‐term stress memory in potato. We showed that epigenetic changes induced by drought stress differentiated Katahdin and five Katahdin‐derived potato cultivars (Cayuga, Dalila, Pontiac, Sebago and Seneca). We determined the cultivar‐specific profiles of differentially methylated regions (DMRs) in the first tuber progeny generation of drought‐primed and non‐primed potato plants planted under non‐stressed conditions. The epigenetic stress effects were transmitted to the first progeny generation and then largely lost in the subsequent generation. This suggests that other molecular components of the stress‐inducible memory mechanism can affect the transmission of epigenetic information between two potato tuber generations. For cultivars ‘Cayuga’ and ‘Sebago’, primed plants produced lower tuber yields than non‐primed plants in the first tuber progeny generation, and nine shared DMRs were localised on potato chromosomes. Four of them were attributed to genic regions, and two were cases of hypermethylation of proline‐rich extensin‐like receptor kinases.
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Claims 11
Claim · model-written summary
Progeny tuber yield depended on cultivar and drought-induced memory.
- Taxon
- potato
Solanum tuberosume1 - Material
- cultivare0
- Outcome
- tuber yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tuber yield in two subsequent tuber progeny generations strongly depended on the cultivar and drought‐induced memory”
e1“The cultivated potato is a tetraploid tuber propagated crop”
Claim · model-written summary
Drought memory significantly lowered first-generation tuber yield under non-stressed conditions.
- Taxon
- potatoSolanum tuberosume1
- Organ / stage
- first tuber progeny generatione0
- Treatment
- drought stress memorye0
- Outcome
- tuber yielde0
- Direction
- lossese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Upon non‐stressed conditions, drought stress memory caused significant tuber yield losses in the first tuber progeny generation”
e1“The cultivated potato is a tetraploid tuber propagated crop”
Claim · model-written summary
Drought memory partially reset in the second stress-free tuber generation.
- Taxon
- potatoSolanum tuberosume1
- Organ / stage
- second stress‐free tuber generatione0
- Outcome
- partial memory resettinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the second stress‐free tuber generation, partial memory resetting was observed”
e1“The cultivated potato is a tetraploid tuber propagated crop”
Claim · model-written summary
Drought-induced epigenetic changes differentiated Katahdin and five derived potato cultivars.
- Taxon
- potatoSolanum tuberosume0
- Material
- Katahdine0
- Treatment
- drought stresse0
- Outcome
- epigenetic changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“epigenetic changes induced by drought stress differentiated Katahdin and five Katahdin‐derived potato cultivars (Cayuga, Dalila, Pontiac, Sebago and Seneca)”
Claim · model-written summary
First-generation drought-primed and non-primed potato plants had cultivar-specific DMR profiles.
- Taxon
- potatoSolanum tuberosume0
- Organ / stage
- first tuber progeny generatione0
- Outcome
- cultivar‐specific profiles of differentially methylated regionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivar‐specific profiles of differentially methylated regions (DMRs) in the first tuber progeny generation of drought‐primed and non‐primed potato plants planted under non‐stressed conditions”
Claim · model-written summary
Epigenetic stress effects reached the first progeny generation and were largely lost in the next.
- Taxon
- potatoSolanum tuberosume1
- Outcome
- epigenetic stress effectse0
- Direction
- largely loste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The epigenetic stress effects were transmitted to the first progeny generation and then largely lost in the subsequent generation”
e1“The cultivated potato is a tetraploid tuber propagated crop”
Claim · model-written summary
Primed Cayuga plants had lower first-generation tuber yields than non-primed plants.
- Taxon
- potatoSolanum tuberosume1
- Material
- Cayugae0
- Treatment
- primed plantse0
- Outcome
- tuber yieldse0
- Direction
- lowere0
- Comparator
- non‐primed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For cultivars ‘Cayuga’ and ‘Sebago’, primed plants produced lower tuber yields than non‐primed plants in the first tuber progeny generation”
e1“The cultivated potato is a tetraploid tuber propagated crop”
Claim · model-written summary
Primed Sebago plants had lower first-generation tuber yields than non-primed plants.
- Taxon
- potatoSolanum tuberosume1
- Material
- Sebagoe0
- Treatment
- primed plantse0
- Outcome
- tuber yieldse0
- Direction
- lowere0
- Comparator
- non‐primed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For cultivars ‘Cayuga’ and ‘Sebago’, primed plants produced lower tuber yields than non‐primed plants in the first tuber progeny generation”
e1“The cultivated potato is a tetraploid tuber propagated crop”
Claim · model-written summary
Nine shared DMRs were localized on potato chromosomes.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- shared DMRs were localised on potato chromosomese0
- Value
- ninee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nine shared DMRs were localised on potato chromosomes”
Claim · model-written summary
Four shared DMRs were attributed to genic regions.
- Taxon
- potatoSolanum tuberosume1
- Outcome
- attributed to genic regionse0
- Value
- Foure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four of them were attributed to genic regions”
e1“The cultivated potato is a tetraploid tuber propagated crop”
Claim · model-written summary
Two DMRs were hypermethylation cases involving proline-rich extensin-like receptor kinases.
- Taxon
- potatoSolanum tuberosume1
- Gene
- proline‐rich extensin‐like receptor kinasese0
- Outcome
- hypermethylatione0
- Value
- twoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two were cases of hypermethylation of proline‐rich extensin‐like receptor kinases”
e1“The cultivated potato is a tetraploid tuber propagated crop”
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