FIGURE 2 in Embryology of Polygonatum (Asparagaceae) and its systematic significance

FIGURE 2. Megasporogenesis and female gametophyte development of Polygonatum macropodum and P. sibiricum. a. Longitudinal section of ovary, showing four ovules. b. Cross section of ovary, showing three locules, anatropous ovule. c. Showing micropyle formed by the inner integument. d. Megasporocyte. e. Megasporocyte at leptotene. f. Megasporocyte at zygotene. g. Megasporocyte at pachytene. h. Megasporocyte at diplotene. i. Megasporocyte at diakinesis. j. Megasporocyte at metaphase I. k. Megasporocyte at anaphase I. l. Dyad. m. Megasporocyte at anaphase II (T-shaped). n. Linear tetrad. o. Mononuclear embryo sac. p. Mononuclear embryo sac at mitosis anaphase. a scale bar =0.6 cm; b scale bar =500 μm; c–p scale bar =50 μm.