Abstract
For many potato cultivars, tuber yield is optimal at average daytime temperatures in the range 14-22 °C. Above this range, tuber yield is reduced for most cultivars. We previously reported that moderately elevated temperature increases steady-state expression of the core circadian clock gene TIMING OF CAB EXPRESSION 1 (StTOC1) in developing tubers, whereas expression of the StSP6A tuberization signal is reduced, along with tuber yield. In this study we provide evidence that StTOC1 links environmental signalling with potato tuberization by suppressing StSP6A autoactivation in the stolons. We show that transgenic lines silenced in StTOC1 expression exhibit enhanced StSP6A transcript levels and changes in gene expression in developing tubers that are indicative of an elevated sink strength. Nodal cuttings of StTOC1 antisense lines displayed increased tuber yields at moderately elevated temperatures, whereas tuber yield and StSP6A expression were reduced in StTOC1 overexpressor lines. Here we identify a number of StTOC1 binding partners and demonstrate that suppression of StSP6A expression is independent of StTOC1 complex formation with the potato homolog StPIF3. Down-regulation of StTOC1 thus provides a strategy to mitigate the effects of elevated temperature on tuber yield.
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Claims 9
Claim · model-written summary
StTOC1 links environmental signalling to potato tuberization by suppressing StSP6A autoactivation in the stolons.
- Taxon
- potato
Solanum tuberosumt0 - Gene
- StTOC1e1
- Outcome
- tuberizatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“regulator of tuberization in potato”
e1“StTOC1 links environmental signalling with potato tuberization by suppressing StSP6A autoactivation in the stolons”
Claim · model-written summary
Transgenic lines silenced in StTOC1 expression showed enhanced StSP6A transcript levels.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- silenced in StTOC1 expressione2
- Gene
- StSP6Ae2
- Outcome
- StSP6A transcript levelse2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“regulator of tuberization in potato”
e2“transgenic lines silenced in StTOC1 expression exhibit enhanced StSP6A transcript levels”
Claim · model-written summary
Silenced StTOC1 lines showed gene expression changes in developing tubers indicative of elevated sink strength.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- developing tuberse3
- Outcome
- changes in gene expression in developing tuberse3
- Qualifier
- indicative of an elevated sink strengthe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“regulator of tuberization in potato”
e3“changes in gene expression in developing tubers that are indicative of an elevated sink strength”
Claim · model-written summary
StTOC1 antisense nodal cuttings showed increased tuber yields at moderately elevated temperatures.
- Taxon
- potatoSolanum tuberosumt0
- Material
- StTOC1 antisense linese4
- Organ / stage
- Nodal cuttingse4
- Treatment
- moderately elevated temperaturese4
- Outcome
- tuber yieldse4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“regulator of tuberization in potato”
e4“Nodal cuttings of StTOC1 antisense lines displayed increased tuber yields at moderately elevated temperatures”
Claim · model-written summary
StTOC1 overexpressor lines showed reduced tuber yield.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- overexpressor linese5
- Outcome
- tuber yielde5
- Direction
- reducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“regulator of tuberization in potato”
e5“whereas tuber yield and StSP6A expression were reduced in StTOC1 overexpressor lines”
Claim · model-written summary
StTOC1 overexpressor lines showed reduced StSP6A expression.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- overexpressor linese5
- Gene
- StSP6Ae5
- Outcome
- StSP6A expressione5
- Direction
- reducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“regulator of tuberization in potato”
e5“whereas tuber yield and StSP6A expression were reduced in StTOC1 overexpressor lines”
Claim · model-written summary
StTOC1 binding partners were identified in potato.
- Taxon
- potatoSolanum tuberosumt0
- Gene
- StTOC1e2
- Outcome
- StTOC1 binding partnerse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“regulator of tuberization in potato”
e2“Here we identify a number of StTOC1 binding partners”
Claim · model-written summary
Suppression of StSP6A expression by StTOC1 is independent of StTOC1 complex formation with the potato homolog StPIF3.
- Taxon
- potatoSolanum tuberosumt0
- Gene
- StPIF3e6
- Outcome
- suppression of StSP6A expressione6
- Qualifier
- independent of StTOC1 complex formatione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“regulator of tuberization in potato”
e6“suppression of StSP6A expression is independent of StTOC1 complex formation with the potato homolog StPIF3”
Claim · model-written summary
Down-regulation of StTOC1 may mitigate the effects of elevated temperature on potato tuber yield.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Down-regulation of StTOC1e7
- Outcome
- the effects of elevated temperature on tuber yielde7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“regulator of tuberization in potato”
e7“Down-regulation of StTOC1 thus provides a strategy to mitigate the effects of elevated temperature on tuber yield”
The same questions in other papers
heat · yield · Solanum tuberosum (potato)Results differ
5 papers in the same direction as this paper · 14 in the opposite direction
- negative
- positive
- negative
16 papers more in this group
See all 20 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.