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Table 1 Major microscopic structural events in the developing fruits of G. elata and G. nantoensis

From: Embryology of two mycoheterotrophic orchid species, Gastrodia elata and Gastrodia nantoensis: ovule and embryo development

Developmental stage Days after pollination
G. elata G. nantoensis
Archesporial cell and megasporocyte 0 0
Megasporogenesis and megagametogenesis 2 2–4
Mature embryo sac 4 6
Fertilization and zygote 6 8
Proembryo 8 12
Globular embryo 10 14–16
Late globular embryo 12–14 18
Mature seed 16 20