Dynamics of floret primordia from jointing to five days after anthesis in winter wheat in response to two foliar spray treatments (S0: water [circles]; S1: 6-BA [triangles]) in three spikelet categories (basal, central and apical).

<p>The lowercase letters indicate the three stages of floret developmental dynamics: differentiation (a), degeneration (b) and abortion (c). In each panel, the left dotted lines indicate jointing, the middle dotted lines indicate 21 days after jointing, and the right dotted lines indicate flowering. The arrows indicate the point at which spraying was conducted.