Female Short Shoot and Ovule Development in Ginkgo biloba L. with Emphasis on Structures Associated with Wind Pollination

Figure 2

Tissues during ovule differentiation process in G. biloba. (a) Position of ovules and leaf in female bud. (b) General stalk differentiated and its tip extended and swelled. ((c)-(d)) Formation of integument primordium on tip general stalk. ((e)-(f)) Center of integument differentiated into nucellar tissue. ((g)–(j)) Integument tissue grew to encircle nucellus. ((k)-(l)) Mature ovules with well-developed collar, integument, nucellus, micropyle, and micropyle tunnel. co, collar; gs, general stalk; i, integument; le, leaf; mi, micropyle; nu, nucellus; op, ovular primordium. Bars: ((a)–(e)) = 100 𝜇m; ((f), (h), (j), (l)) = 100 𝜇m; ((g), (i), (k)) = 200 𝜇m.

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