. Embryogenesis in plants. Embryology. Fig. 78 A, B, Embryogeny in Monotropa hypopitys. A, of seed, showing embryo- germling, as yet without mycorrhizic fungus. B, An older germhng with fungus (B, X 10; after Francke). C-E, Embryogeny in Zeuxine sulcata. C, Binucleate embryo sac and two-ceiled nucellar embryo. D, E, Formation of several embryos (C, X 490; D, E, x 56; after Swamy). without differentiation of plumule, cotyledons or radicle. The cellular endosperm forms a rather feeble chalazal haustorium but a very aggressive micropylar one with intercellular hypha-like branches which penet
. Embryogenesis in plants. Embryology. Fig. 78 A, B, Embryogeny in Monotropa hypopitys. A, of seed, showing embryo- germling, as yet without mycorrhizic fungus. B, An older germhng with fungus (B, X 10; after Francke). C-E, Embryogeny in Zeuxine sulcata. C, Binucleate embryo sac and two-ceiled nucellar embryo. D, E, Formation of several embryos (C, X 490; D, E, x 56; after Swamy). without differentiation of plumule, cotyledons or radicle. The cellular endosperm forms a rather feeble chalazal haustorium but a very aggressive micropylar one with intercellular hypha-like branches which penetrate the integument. These endosperm developments, however, are general in the autotrophic Scrophulariaceae and are not correlated with the parasitic habit in Cistanche. In Monotropa hypopitys (Ericales: Monotropaceae), a saprophytic species well known because of its ectotrophic mycorrhizic nutrition, the mature seed is very small and contains an embryo consisting of three cells only, surrounded by an endosperm of nine cells, Fig. 78a, b. During germination, which apparently only takes place after some. 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
Size: 1006px × 2486px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectembryology
