Flowering time is strongly dependent on the daily light energy integral and is regulated by an array of genes among which SINGLE FLOWER TRUSS (SFT) and SELF PRUNING (SP) play a major role. The nature of its reproductive structure, a raceme or a cyme, is still questioned but available evidence supports the view that the tomato inflorescence is racemose.

Tomato is an autonomously flowering plant with a sympodial growth habit, which means that it flowers repeatedly, at the top of an initial segment and of successive sympodial segments.

Development of the reproductive structures up to anthesis, having been reviewed on several occasions in the past, is not considered. In this paper, we focus on the early stages of the flowering process, analysing how flowering time and reproductive morphogenesis are regulated. The disruption of the sequence of events which give rise to normal development of the reproductive structures by either the manipulation of the environment, hormones or mutations has provided information useful to unravel the complexity of the implicated mechanisms. Flowering in tomato (Solanum lycopersicum L.) has long been investigated by plant physiologists and horticulturists aiming to increase productivity of this important fruit crop.

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