Abstract
Above-optimal temperatures reduce yield in many crops, including tomato, largely because of the heat-sensitivity of their reproduction process. A full understanding of heat-stress (HS) response and thermotolerance of tomato reproduction is still lacking. Recently, using external application of the plant hormone ethylene, it was demonstrated that ethylene plays a role in heat-tolerance of tomato pollen (the male reproductive cells). In order to expand our understanding on involvement of ethylene in tomato pollen thermotolerance, we analyzed the response of wild type and ethylene-related tomato mutant plants to HS, at physiological and molecular levels. We report that mild chronic HS conditions highly reduce the number of viable and germinating pollen grains as well as the production of seeded fruits in wild type tomato plants, while no significant reduction was detected/observed in pollen quality, number of seeded fruits and seeds per fruit in plants of the ethylene over-producer mutant epinastic. Our findings suggest that ethylene is involved in thermotolerance of tomato reproduction, pointing to an effect on pollen viability and germination potential, highlighting candidate genes involved in pollen response to HS (like SlHSP17, SlHSP101, SlMBF1) and suggesting directions for further studies.
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Claims 7
Claim · model-written summary
Chronic mild heat stress reduced viable pollen in wild-type tomato.
- Taxon
- tomato
Solanum lycopersicume0 - Material
- wild typee0
- Treatment
- mild chronic HS conditionse0
- Outcome
- viable and germinating pollen grainse0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mild chronic HS conditions highly reduce the number of viable and germinating pollen grains as well as the production of seeded fruits in wild type tomato plants”
Claim · model-written summary
Chronic mild heat stress reduced germinating pollen in wild-type tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- wild typee0
- Treatment
- mild chronic HS conditionse0
- Outcome
- germinating pollen grainse0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mild chronic HS conditions highly reduce the number of viable and germinating pollen grains as well as the production of seeded fruits in wild type tomato plants”
Claim · model-written summary
Chronic mild heat stress reduced seeded fruit production in wild-type tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- wild typee0
- Treatment
- mild chronic HS conditionse0
- Outcome
- production of seeded fruitse0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mild chronic HS conditions highly reduce the number of viable and germinating pollen grains as well as the production of seeded fruits in wild type tomato plants”
Claim · model-written summary
Heat stress did not significantly reduce pollen quality in epinastic tomato.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- epinastice0
- Treatment
- HSe1
- Outcome
- pollen qualitye0
- Direction
- no significant reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant reduction was detected/observed in pollen quality, number of seeded fruits and seeds per fruit in plants of the ethylene over-producer mutant epinastic”
t0“Tomato”
e1“mild chronic HS conditions highly reduce the number of viable and germinating pollen grains”
Claim · model-written summary
Heat stress did not significantly reduce seeded fruit number in epinastic tomato.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- epinastice0
- Treatment
- HSe1
- Outcome
- number of seeded fruitse0
- Direction
- no significant reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant reduction was detected/observed in pollen quality, number of seeded fruits and seeds per fruit in plants of the ethylene over-producer mutant epinastic”
t0“Tomato”
e1“mild chronic HS conditions highly reduce the number of viable and germinating pollen grains”
Claim · model-written summary
Heat stress did not significantly reduce seeds per fruit in epinastic tomato.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- epinastice0
- Treatment
- HSe1
- Outcome
- seeds per fruite0
- Direction
- no significant reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant reduction was detected/observed in pollen quality, number of seeded fruits and seeds per fruit in plants of the ethylene over-producer mutant epinastic”
t0“Tomato”
e1“mild chronic HS conditions highly reduce the number of viable and germinating pollen grains”
Claim · model-written summary
Authors suggest ethylene contributes to tomato reproductive heat tolerance.
- Taxon
- tomatoSolanum lycopersicume0
- Compound
- ethylenee0
- Outcome
- thermotolerance of tomato reproductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ethylene is involved in thermotolerance of tomato reproduction, pointing to an effect on pollen viability and germination potential”
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