Abstract
Tomato seedlings were treated with nutrient solutions containing varying nitrogen concentrations (50, 150, and 250 mg·L−1) after germination until the completion of flower bud differentiation. The changes in nutrient content, enzyme activity, endogenous hormone levels, and gene expression in the stem apex were analyzed to explore the mechanisms regulating the number of locules in tomatoes at different nitrogen concentrations. The results indicated that an increase in nitrogen concentration facilitated the differentiation of tomato flower buds, increased the number of fruit locules, and increased the contents of soluble sugar, soluble protein, starch, and sucrose, as well as the activities of the enzymes POD, NR, and PPO in the seedling stem apex. The contents of soluble sugars and soluble proteins, as well as the activities of POD, NR, and PPO, were closely correlated with the number of fruit locules. An increase in nitrogen concentration was also found to elevate cytokinin levels while reducing auxin content in the stem apex. The transcriptome analysis screened for peroxidase genes, auxin response genes, and cytokinin synthesis genes. The analysis of gene expression patterns suggests that CKX and LOG6 play significant roles in flower development. Additionally, combined physiological changes indicated that an increase in nitrogen concentration during the tomato seedling stage leads to a higher number of fruit locules, which may be associated with elevated cytokinin content, primarily involving the key genes CKX and LOG6.
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Claims 12
Claim · model-written summary
Increasing nitrogen facilitated tomato flower bud differentiation.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- an increase in nitrogen concentratione0
- Outcome
- differentiation of tomato flower budse0
- Direction
- facilitatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in nitrogen concentration facilitated the differentiation of tomato flower buds”
Claim · model-written summary
Increasing nitrogen increased tomato fruit locule number.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Varying Nitrogen Concentrationst0
- Outcome
- number of fruit loculese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the number of fruit locules”
t0“Effects of Varying Nitrogen Concentrations on the Locule Number in Tomato Fruit”
Claim · model-written summary
Increasing nitrogen increased soluble sugar, soluble protein, and starch contents in the seedling stem apex.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Varying Nitrogen Concentrationst0
- Outcome
- contents of soluble sugar, soluble protein, starche0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the contents of soluble sugar, soluble protein, starch, and sucrose”
t0“Effects of Varying Nitrogen Concentrations on the Locule Number in Tomato Fruit”
Claim · model-written summary
Increasing nitrogen increased sucrose content in the tomato seedling stem apex.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Varying Nitrogen Concentrationst0
- Outcome
- sucrosee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the contents of soluble sugar, soluble protein, starch, and sucrose”
t0“Effects of Varying Nitrogen Concentrations on the Locule Number in Tomato Fruit”
Claim · model-written summary
Increasing nitrogen increased POD, NR, and PPO activities in the tomato seedling stem apex.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Varying Nitrogen Concentrationst0
- Gene
- POD, NR, and PPOe0
- Outcome
- activities of the enzymes POD, NR, and PPOe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results indicated that an increase in nitrogen concentration facilitated the differentiation of tomato flower buds, increased the number of fruit locules, and increased the contents of soluble sugar, soluble protein, starch, and sucrose, as well as the activities of the enzymes POD, NR, and PPO in the seedling stem apex”
t0“Effects of Varying Nitrogen Concentrations on the Locule Number in Tomato Fruit”
Claim · model-written summary
Soluble sugar and protein contents were closely correlated with tomato fruit locule number.
- Taxon
- TomatoSolanum lycopersicumt0
- Compound
- soluble sugars and soluble proteinse0
- Outcome
- number of fruit loculese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of soluble sugars and soluble proteins, as well as the activities of POD, NR, and PPO, were closely correlated with the number of fruit locules”
t0“Tomato Fruit”
Claim · model-written summary
POD, NR, and PPO activities were closely correlated with tomato fruit locule number.
- Taxon
- TomatoSolanum lycopersicumt0
- Gene
- POD, NR, and PPOe0
- Outcome
- number of fruit loculese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of soluble sugars and soluble proteins, as well as the activities of POD, NR, and PPO, were closely correlated with the number of fruit locules”
t0“Tomato Fruit”
Claim · model-written summary
Increasing nitrogen elevated cytokinin levels in the tomato stem apex.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- stem apexe0
- Treatment
- An increase in nitrogen concentratione0
- Outcome
- cytokinin levelse0
- Direction
- elevatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An increase in nitrogen concentration was also found to elevate cytokinin levels while reducing auxin content in the stem apex”
t0“Tomato Fruit”
Claim · model-written summary
Increasing nitrogen reduced auxin content in the tomato stem apex.
- Taxon
- TomatoSolanum lycopersicumt0
- Organ / stage
- stem apexe0
- Treatment
- An increase in nitrogen concentratione0
- Outcome
- auxin contente0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An increase in nitrogen concentration was also found to elevate cytokinin levels while reducing auxin content in the stem apex”
t0“Tomato Fruit”
Claim · model-written summary
Transcriptome analysis identified peroxidase, auxin response, and cytokinin synthesis genes.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- peroxidase genes, auxin response genes, and cytokinin synthesis genese0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The transcriptome analysis screened for peroxidase genes, auxin response genes, and cytokinin synthesis genes”
t0“Tomato Fruit”
Claim · model-written summary
Expression patterns suggest CKX and LOG6 have significant roles in tomato flower development.
- Taxon
- TomatoSolanum lycopersicumt0
- Gene
- CKX and LOG6e0
- Outcome
- flower developmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The analysis of gene expression patterns suggests that CKX and LOG6 play significant roles in flower development”
t0“Tomato Fruit”
Claim · model-written summary
Higher tomato fruit locule number under increased nitrogen may be associated with elevated cytokinin content involving CKX and LOG6.
- Taxon
- tomatoSolanum lycopersicume0
- Gene
- CKX and LOG6e0
- Compound
- cytokinin contente0
- Outcome
- number of fruit loculese0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in nitrogen concentration during the tomato seedling stage leads to a higher number of fruit locules, which may be associated with elevated cytokinin content, primarily involving the key genes CKX and LOG6”
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