Abstract
Exposure to high temperatures leads to failure in pollen development, which may have significant implications for food security with ongoing climate change. We hypothesized that the stress response-associated hormone salicylic acid (SA) affects pollen tolerance to long-term mild heat (LTMH) (≥14 days exposure to day-/nighttime temperature of 30–34/24–28°C, depending on the genotype), either positively, by inducing acclimation, or negatively, by reducing investment in reproductive development. Here, we investigated these hypotheses assessing the pollen thermotolerance of a 35S:nahG tomato line, which has low SA levels. We found that reducing the SA level resulted in increased pollen viability of plants grown in LTMH and further characterized this line by transcriptome, carbohydrate, and hormone analyses. Low expression of JAZ genes in 35S:nahG and LTMH hypersensitivity of low-jasmonic acid (JA) genotypes together suggest that the increased pollen thermotolerance in the low-SA line involves enhanced JA signal in developing anthers in LTMH. These findings have potential application in the development of more thermotolerant crops.
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Claims 4
Claim · model-written summary
Reducing salicylic acid increased pollen viability under long-term mild heat.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- reducing the SA levele0
- Outcome
- pollen viabilitye0
- Direction
- increasede0
- Qualifier
- grown in LTMHe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing the SA level resulted in increased pollen viability of plants grown in LTMH”
t0“Tomato”
Claim · model-written summary
JAZ gene expression was low in 35S:nahG.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- 35S:nahGe0
- Gene
- JAZ genese0
- Outcome
- expression of JAZ genese0
- Direction
- Lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low expression of JAZ genes in 35S:nahG”
t0“Tomato”
Claim · model-written summary
Low-jasmonic acid genotypes were hypersensitive to long-term mild heat.
- Taxon
- TomatoSolanum lycopersicumt0
- Material
- low-jasmonic acid (JA) genotypese0
- Outcome
- LTMH hypersensitivitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LTMH hypersensitivity of low-jasmonic acid (JA) genotypes”
t0“Tomato”
Claim · model-written summary
The authors suggest enhanced jasmonic acid signaling in developing anthers under heat contributes to increased pollen thermotolerance of the low-SA line.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- developing antherse0
- Compound
- JAe0
- Outcome
- increased pollen thermotolerancee0
- Direction
- increasede0
- Qualifier
- in LTMHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggest that the increased pollen thermotolerance in the low-SA line involves enhanced JA signal in developing anthers in LTMH”
t0“Tomato”
The same questions in other papers
salicylic acid · yield · Solanum lycopersicum (tomato)Positive and negative results
44 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- negative
44 papers more in this group
See all 48 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.