Abstract
Potato is an important staple food with increasing popularity worldwide. Elevated temperatures significantly impair tuber yield and quality. Breeding heat-tolerant cultivars is therefore an urgent need to ensure sustainable potato production in the future. An integrated approach combining physiology, biochemistry, and molecular biology was undertaken to contribute to a better understanding of heat effects on source- (leaves) and sink-organs (tubers) in a heat-susceptible cultivar. An experimental set-up was designed allowing tissue-specific heat application. Elevated day and night (29°C/27°C) temperatures impaired photosynthesis and assimilate production. Biomass allocation shifted away from tubers towards leaves indicating reduced sink strength of developing tubers. Reduced sink strength of tubers was paralleled by decreased sucrose synthase activity and expression under elevated temperatures. Heat-mediated inhibition of tuber growth coincided with a decreased expression of the phloem-mobile tuberization signal SP6A in leaves. SP6A expression and photosynthesis were also affected, when only the belowground space was heated, and leaves were kept under control conditions. By contrast, the negative effects on tuber metabolism were attenuated, when only the shoot was subjected to elevated temperatures. This, together with transcriptional changes discussed, indicated a bidirectional communication between leaves and tubers to adjust the source capacity and/or sink strength to environmental conditions.
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Claims 8
Claim · model-written summary
Elevated day and night temperatures impaired potato photosynthesis and assimilate production.
- Taxon
- Potato
Solanum tuberosume0 - Treatment
- Elevated day and night (29°C/27°C) temperaturese1
- Outcome
- photosynthesis and assimilate productione1
- Direction
- impairede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato is an important staple food with increasing popularity worldwide”
e1“Elevated day and night (29°C/27°C) temperatures impaired photosynthesis and assimilate production”
Claim · model-written summary
Elevated temperatures shifted potato biomass allocation away from tubers towards leaves.
- Taxon
- PotatoSolanum tuberosume0
- Organ / stage
- tuberse2
- Treatment
- Elevated day and night (29°C/27°C) temperaturese1
- Outcome
- Biomass allocatione2
- Direction
- shifted away from tubers towards leavese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato is an important staple food with increasing popularity worldwide”
e1“Elevated day and night (29°C/27°C) temperatures impaired photosynthesis and assimilate production”
e2“Biomass allocation shifted away from tubers towards leaves indicating reduced sink strength of developing tubers”
Claim · model-written summary
The shift of biomass away from tubers indicates reduced sink strength of developing potato tubers.
- Taxon
- PotatoSolanum tuberosume0
- Organ / stage
- developing tuberse2
- Outcome
- sink strengthe2
- Direction
- reducede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato is an important staple food with increasing popularity worldwide”
e2“Biomass allocation shifted away from tubers towards leaves indicating reduced sink strength of developing tubers”
Claim · model-written summary
Elevated temperatures decreased sucrose synthase activity and expression in potato tubers.
- Taxon
- PotatoSolanum tuberosume0
- Organ / stage
- tuberse3
- Treatment
- elevated temperaturese3
- Gene
- sucrose synthasee3
- Outcome
- sucrose synthase activity and expressione3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato is an important staple food with increasing popularity worldwide”
e3“Reduced sink strength of tubers was paralleled by decreased sucrose synthase activity and expression under elevated temperatures”
Claim · model-written summary
Heat-mediated inhibition of potato tuber growth coincided with decreased SP6A expression in leaves.
- Taxon
- PotatoSolanum tuberosume0
- Organ / stage
- leavese4
- Gene
- SP6Ae4
- Outcome
- expression of the phloem-mobile tuberization signal SP6Ae4
- Direction
- decreasede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato is an important staple food with increasing popularity worldwide”
e4“Heat-mediated inhibition of tuber growth coincided with a decreased expression of the phloem-mobile tuberization signal SP6A in leaves”
Claim · model-written summary
When only the belowground space was heated, SP6A expression and photosynthesis were affected relative to leaves kept under control conditions.
- Taxon
- PotatoSolanum tuberosume0
- Organ / stage
- leavese5
- Treatment
- only the belowground space was heatede5
- Gene
- SP6Ae5
- Outcome
- SP6A expression and photosynthesise5
- Comparator
- control conditionse5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato is an important staple food with increasing popularity worldwide”
e5“SP6A expression and photosynthesis were also affected, when only the belowground space was heated, and leaves were kept under control conditions”
Claim · model-written summary
Heating only the shoot attenuated the negative effects of heat on potato tuber metabolism.
- Taxon
- PotatoSolanum tuberosume0
- Organ / stage
- tubere6
- Treatment
- only the shoot was subjected to elevated temperaturese6
- Outcome
- tuber metabolisme6
- Direction
- attenuatede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato is an important staple food with increasing popularity worldwide”
e6“By contrast, the negative effects on tuber metabolism were attenuated, when only the shoot was subjected to elevated temperatures”
Claim · model-written summary
Leaves and tubers communicate bidirectionally to adjust potato source capacity and sink strength to environmental conditions.
- Taxon
- PotatoSolanum tuberosume0
- Outcome
- bidirectional communication between leaves and tuberse7
- Qualifier
- to adjust the source capacity and/or sink strength to environmental conditionse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato is an important staple food with increasing popularity worldwide”
e7“This, together with transcriptional changes discussed, indicated a bidirectional communication between leaves and tubers to adjust the source capacity and/or sink strength to environmental conditions”
The same questions in other papers
heat · molecular: metabolites · Solanum tuberosum (potato)Positive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- negative
3 papers more in this group
See all 7 papers →heat · molecular: expression · Solanum tuberosum (potato)Positive and negative results
5 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 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.