Fig. 2
From: Brassinosteroid signaling may regulate the germination of axillary buds in ratoon rice
Young spike differentiation of axillary buds. (a) Pollen mother cells (the pulvinus distance is − 3- (− 5) cm, glume length is 50%). (b) Dyad (the pulvinus distance is − 4-(+ 2) cm, panicle length is 7–10 cm, glume length is 55–75%). (c) Tetrad. (d) The initial microspore stage (The pulvinus distance is − 4-(+ 2) cm, glume length is 60–80%). (e) Mononuclear centralization of the microspore (the pulvinus distance is 4–8 cm, glume length is 70–80%). (f) Single nucleus to the side (the pulvinus distance is 8–15 cm, glume length is 85–95%, blade internode is 0.5–1 cm). (g) Nuclear division (the pulvinus distance is 12–20 cm, glume length is 100%). (h) Pollen maturity (the panicle occipital interval is greater than − 2 cm, the spike neck length is 5 cm)