Flowering response of the uniflora:blind:self pruning and jointless:uniflora:self pruning tomato (Solanum lycopersicum) triple mutants.
(2011) Physiologia Plantarum : an international journal for plant biology — Vol. 141, n° 2, p. 166-176 (2011)
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- Tomato (Solanum lycopersicum) is a day-neutral plant with a sympodial growth habit. Triple mutants were produced in order to investigate the genetic interactions in the flowering regulation of this species in the initial and sympodial segments. The jointless: uniflora: self pruning and uniflora: blind: self pruning triple mutants were produced by crossing the jointless:uniflora and uniflora:blind double mutants with the uniflora:self pruning double mutant. The phenotype of the triple mutants was characterised and the expression of the affected genes was studied in the uniflora mutant through semi quantitative reverse transcriptase PCR. The triple mutants produced solitary flowers, as their uniflora parent, instead of inflorescences. They were both late flowering in the initial segment with a flowering time intermediate between their parental double mutants. The flowering time of the sympodial segments was delayed in the jointless: uniflora: self pruning triple mutant while the uniflora: blind: self pruning triple mutant did not initiate sympodial segments. The expression of the studied genes was not markedly affected by the uniflora mutation. These results suggest that floral transition of the primary shoot and of sympodial segments is regulated differently in tomato. The UNIFLORA gene acts upstream of the other investigated genes in controlling reproductive structure and flowering time of the initial segment although their expression does not seem affected by the uniflora mutation. In the sympodial segments, the self pruning determinate phenotype is strengthened by the blind mutation and suppressed by the jointless mutation.
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Quinet, M., Kinet, J.-M., & Lutts, S. (2011). Flowering response of the uniflora:blind:self pruning and jointless:uniflora:self pruning tomato (Solanum lycopersicum) triple mutants. Physiologia Plantarum : an international journal for plant biology, 141(2), 166-176. https://doi.org/10.1111/j.1399-3054.2010.01426.x (Original work published 2011)