Periods of Organogenesis in Mono‐ and Bicyclic Annual Shoots of Juglans regia L. (Juglandaceae)

Unfolding of leaves and of the female inflorescence in walnut

Sabatier et al. (pp. 231-238) show that pre-formed leaf and female inflorescences in Juglans regia are differentiated in the bud during extension of the parental annual shoot. The ability to exhibit several periods of leaf differentiation during one growing season is a feature related to the marked capacity of J. regia to respond to environmental fluctuations.