Fig. 7
From: Sporogenesis, gametophyte development and embryogenesis in Glehnia littoralis
Embryo development of G. littoralis. a Fertilization. b, c Zygote. d Multicellular embryo. e Early spherical embryo. f, g Globular embryo. h Pear-shaped embryo. i Early heart-shaped embryo. j, k Heart-shaped embryo. l Late heart-shaped embryo. m, o Early torpedo-shaped embryo. n, p Torpedo-shaped embryo. q-s, t-v Cotyledon-shaped embryo. w, x, y Mature embryo. Zy: zygote, pen: primary endosperm nucleus, em: embryo, su: suspensor, ra: radicle, pa: plumular axis, pl: plantule, co: cotyledon. Scale bar = 30 μm in a-c; scale bar = 40 μm in d; scale bar = 20 μm in e, g, h; scale bar = 200 μm in f, j, w; scale bar = 100 μm in i, k-l, o-p, t-v, x-y; scale bar = 500 μm in m, n, q; scale bar = 300 μm in r, s