Abstract
The inflorescences and lateral branches of higher plants are generated by lateral meristems. The structure of the inflorescence has a direct effect on fruit yield in tomato (Solanum lycopersicum). We previously demonstrated that miR156a plays important roles in determining the structures of the inflorescences and lateral branches in tomato by suppressing the expression of the SQUAMOSA PROMOTER BINDING PROTEIN LIKE (SPL) transcription factor gene family. However, information on regulatory pathways associated with inflorescence morphogenesis is still lacking. In this study, we demonstrate that SPL13 is the major SPL involved in miR156a-regulated tomato inflorescence structure determination and lateral branch production. Suppressing the expression of SPL13 in tomato increases the number of inflorescences on vegetative branches and lateral branches, decreases the number of flowers and fruit, and reduces fruit size and yield. Genetic and biochemical evidence indicate that SPL13 controls inflorescence development by positively regulating the expression of the tomato inflorescence-associated gene SINGLE FLOWER TRUSS (SFT) by directly binding to its promoter region. Thus, our findings provide a major advance to our understanding of the miR156a-SlSPL-based mechanism that regulates plant architecture and yield in tomato.
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Claims 5
Claim · model-written summary
SPL13 is the major SPL in miR156a-regulated inflorescence structure and lateral branching.
- Taxon
- tomato
Solanum lycopersicume0 - Gene
- SPL13e0
- Outcome
- inflorescence structure determination and lateral branch productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SPL13 is the major SPL involved in miR156a-regulated tomato inflorescence structure determination and lateral branch production”
Claim · model-written summary
Suppressing SPL13 increased inflorescences on vegetative branches and lateral branches.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Suppressing the expression of SPL13e0
- Gene
- SPL13e0
- Outcome
- number of inflorescences on vegetative branches and lateral branchese0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Suppressing the expression of SPL13 in tomato increases the number of inflorescences on vegetative branches and lateral branches”
Claim · model-written summary
Suppressing SPL13 decreased flower and fruit numbers.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Suppressing the expression of SPL13e0
- Gene
- SPL13e0
- Outcome
- number of flowers and fruite0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Suppressing the expression of SPL13 in tomato increases the number of inflorescences on vegetative branches and lateral branches, decreases the number of flowers and fruit”
Claim · model-written summary
Suppressing SPL13 reduced fruit size and yield.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Suppressing the expression of SPL13e0
- Gene
- SPL13e0
- Outcome
- fruit size and yielde0
- Direction
- reducese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Suppressing the expression of SPL13 in tomato increases the number of inflorescences on vegetative branches and lateral branches, decreases the number of flowers and fruit, and reduces fruit size and yield”
Claim · model-written summary
SPL13 directly binds the SFT promoter and positively regulates SFT expression to control inflorescence development.
- Taxon
- tomatoSolanum lycopersicume0
- Gene
- SPL13e0
- Outcome
- inflorescence developmente0
- Qualifier
- positively regulating the expression of the tomato inflorescence-associated gene SINGLE FLOWER TRUSS (SFT) by directly binding to its promoter regione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SPL13 controls inflorescence development by positively regulating the expression of the tomato inflorescence-associated gene SINGLE FLOWER TRUSS (SFT) by directly binding to its promoter region”
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