Skip to main content
Fig. 3 | BMC Plant Biology

Fig. 3

From: Gametophyte and embryonic ontogeny: understanding the reproductive calendar of Cypripedium japonicum Thunb. (Cypripedoideae, Orchidaceae), a lady’s slipper orchid endemic to East Asia

Fig. 3

Development megagametophyte and zygote in Cypripedium japonicum. a. Four nucleate embryo sac formed by first mitotic division in nucleus of functional dyad. b. Micropylar nuclei after second mitotic division (rectangle line). c-d. Six nucleate mature embryo sac. e. Pollen tube. f. Zygote and endosperm nucleus (asterisks in central cell indicate triple fusion). Abbreviations: ant, antipodal cell; eg, egg cell; en, endosperm nuclei; n, megaspore nucleus; po, polar nuclei; pt., pollen tube; sy, synergid; z, zygote. Scale bars:  a-h= 20 μm

Back to article page