Abstract
The phenotype of albino tea plants (ATPs) is significantly influenced by temperature regimes and light conditions, which alter certain components of the tea leaves leading to corresponding phenotypic changes. However, the regulatory mechanism of temperature-dependent changes in photosynthetic pigment contents and the resultant leaf colors remain unclear. Here, we examined the chloroplast microstructure, shoot phenotype, photosynthetic pigment content, and the expression of pigment synthesis-related genes in three tea genotypes with different leaf colors under different temperature conditions. The electron microscopy results revealed that all varieties experienced the most severe chloroplast damage at 15 °C, particularly in albino cultivar Baiye 1 (BY), where chloroplast basal lamellae were loosely arranged, and some chloroplasts were even empty. In contrast, the chloroplast basal lamellae at 35 °C and 25 °C were neatly arranged and well-developed, outperforming those observed at 20 °C and 15 °C. Chlorophyll and carotenoid measurements revealed a significant reduction in chlorophyll content under low temperature treatment, peaking at ambient temperature followed by high temperatures. Interestingly, BY showed remarkable tolerance to high temperatures, maintaining relatively high chlorophyll content, indicating its sensitivity primarily to low temperatures. Furthermore, the trends in gene expression related to chlorophyll and carotenoid metabolism were largely consistent with the pigment content. Correlation analysis identified key genes responsible for temperature-induced changes in these pigments, suggesting that changes in their expression likely contribute to temperature-dependent leaf color variations.
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Claims 8
Claim · model-written summary
All tea varieties had the most severe chloroplast damage at 15 °C.
- Taxon
- Camellia sinensis
Camellia sinensist0 - Treatment
- 15 °Ce0
- Outcome
- chloroplast damagee0
- Direction
- most severee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Camellia sinensis”
e0“all varieties experienced the most severe chloroplast damage at 15 °C”
Claim · model-written summary
Baiye 1 had loosely arranged basal lamellae and some empty chloroplasts at 15 °C.
- Taxon
- Camellia sinensisCamellia sinensist0
- Material
- Baiye 1 (BY)e0
- Outcome
- chloroplast basal lamellae were loosely arranged, and some chloroplasts were even emptye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Camellia sinensis”
e0“albino cultivar Baiye 1 (BY), where chloroplast basal lamellae were loosely arranged, and some chloroplasts were even empty”
Claim · model-written summary
Basal lamellae at 35 °C and 25 °C were better developed than at 20 °C and 15 °C.
- Taxon
- Camellia sinensisCamellia sinensist0
- Treatment
- 35 °C and 25 °Ce0
- Outcome
- chloroplast basal lamellaee0
- Direction
- outperforminge0
- Comparator
- 20 °C and 15 °Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Camellia sinensis”
e0“chloroplast basal lamellae at 35 °C and 25 °C were neatly arranged and well-developed, outperforming those observed at 20 °C and 15 °C”
Claim · model-written summary
Low temperature significantly reduced chlorophyll content.
- Taxon
- Camellia sinensisCamellia sinensist0
- Treatment
- low temperature treatmente0
- Outcome
- chlorophyll contente0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Camellia sinensis”
e0“significant reduction in chlorophyll content under low temperature treatment”
Claim · model-written summary
Chlorophyll content peaked at ambient temperature and then high temperatures.
- Taxon
- Camellia sinensisCamellia sinensist0
- Outcome
- peakinge0
- Direction
- peakinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Camellia sinensis”
e0“peaking at ambient temperature followed by high temperatures”
Claim · model-written summary
Baiye 1 retained relatively high chlorophyll content under high temperature.
- Taxon
- Camellia sinensisCamellia sinensist0
- Material
- BYe0
- Outcome
- chlorophyll contente0
- Direction
- relatively highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Camellia sinensis”
e0“BY showed remarkable tolerance to high temperatures, maintaining relatively high chlorophyll content”
Claim · model-written summary
Pigment metabolism gene expression largely followed pigment content trends.
- Taxon
- Camellia sinensisCamellia sinensist0
- Gene
- gene expression related to chlorophyll and carotenoid metabolisme0
- Outcome
- trends in gene expressione0
Not reportedOrgan / stageDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Camellia sinensis”
e0“trends in gene expression related to chlorophyll and carotenoid metabolism were largely consistent with the pigment content”
Claim · model-written summary
Correlation analysis identified genes linked to temperature-induced pigment changes.
- Taxon
- Camellia sinensisCamellia sinensist0
- Gene
- key genese0
- Outcome
- temperature-induced changes in these pigmentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Camellia sinensis”
e0“Correlation analysis identified key genes responsible for temperature-induced changes in these pigments”
The same questions in other papers
cold · physiology: pigments · Camellia sinensis (black tea)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
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.