. Fundamentals of botany. Botany. SEED-BEARINC PLANTS 44I 393. Fertilization and Formation of Embryo.—After pollination the pollen-grain, stimulated by the sticky substance secreted by the stigma, begins to develop a pollen-tube, which passes down the canal that extends through the style from stigma to placenta, nourished by the specialized cells that line the inner surface of the. Fig. 327.—Lilium Martagon. Longitudinal section of the stigma and upper part of the style. The pollen-grains, caught on the papillae of the stigma, have germinated, and the pollen-tubes are growing down along the wa
. Fundamentals of botany. Botany. SEED-BEARINC PLANTS 44I 393. Fertilization and Formation of Embryo.—After pollination the pollen-grain, stimulated by the sticky substance secreted by the stigma, begins to develop a pollen-tube, which passes down the canal that extends through the style from stigma to placenta, nourished by the specialized cells that line the inner surface of the. Fig. 327.—Lilium Martagon. Longitudinal section of the stigma and upper part of the style. The pollen-grains, caught on the papillae of the stigma, have germinated, and the pollen-tubes are growing down along the walls of the style-canal, nourished by the specialised cells that line it. (After Dodel-Port.) canal (Cf. Figs. 324 and 327). When the tip of the tube has passed through the micropyle and into the embryo-sac, the sperm-ceUs, formed during the growth of the tube, pass out into the protoplasm of the embryo-sac, and one of them fuses with the egg-cell, thereby accompHshing fer- tilization (Fig. 328. Cf. Fig. 325). In some cases the embryonic tissue that arises from the fertilized egg gives. 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 Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookauthorgag, bookcentury1900, bookdecade1910, booksubjectbotany
