. Embryogenesis in plants. Embryology. 30 EMBRYOGENESIS IN PLANTS a very early stage in the embryogeny, the relation of the distal to the basal region of the embryonic axis is essentially the same as in a normal adult shoot. A growing body of experimental evidence supports the. Fig. 7. Gradient of cell size in the embryonic development A, Delesseria ruscifolia, red alga, germling (after Nienburg). Notothylas sp., Antho- cerotales, young sporophyte (after Lang). C, Lycopodium selago; et, suspensor, /, foot, a, apex (after Bruchmann). D, Lycopodium cernuum, the enlarged cells of the foot in cont
. Embryogenesis in plants. Embryology. 30 EMBRYOGENESIS IN PLANTS a very early stage in the embryogeny, the relation of the distal to the basal region of the embryonic axis is essentially the same as in a normal adult shoot. A growing body of experimental evidence supports the. Fig. 7. Gradient of cell size in the embryonic development A, Delesseria ruscifolia, red alga, germling (after Nienburg). Notothylas sp., Antho- cerotales, young sporophyte (after Lang). C, Lycopodium selago; et, suspensor, /, foot, a, apex (after Bruchmann). D, Lycopodium cernuum, the enlarged cells of the foot in contact with the prothallus contain starch grains (after Treub). E, Os- munda cinnamomea, showing the large cells of the foot,/, and the smaller cells of the embryonic distal region (after Cross). F, Ginkgo biloba, young embryo (after Lyon). G, Zea mays, young embryo (after Randolph). view that the shoot apex is a self-determining, morphogenetic region: the data given above indicate that this relationship is established at an early stage in the embryogeny. On further growth, the apex of an endoscopic embryo bursts out of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wardlaw, C. W. (Claude Wilson), 1901-. London, Methuen; New York, Wiley
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