Key points are not available for this paper at this time.
Georges Bernier, , Claude Houssa, Anne Petitjean, Pierre Lejeune, Physiological Signals That Induce Flowering, The Plant Cell, Vol. 5, No. 10, Special Review Issue on Plant Reproduction (Oct., 1993), pp. 1147-1155
Bernier et al. (1993) studied this question.