. Beginners botany. Botany. SEEDS AND GERMINATION 25 Germination of Monocotyledons. â Thus far we have stud- ied dicotyledonous seeds ; we may now consider the mono- cotyledonous group. Soak kernels of corn. Note that the micropyle and hilum are at the smaller end (Fig. 24). Make a longitudinal section through the narrow diameter; Fig. 25 shows it. The Jl ^â â wm 1 a4>S 1 h-\^ Fig. 25. âKernel Fig. 24.âSprout- OF Indian Corn. ing Indian Corn. Caulicle at b\ cotyle- Hilum at//; micro- don at a; plumule pyle at d. at/.. Fig. 26.âIndian Corn. Caulicle at c; roots emerging at ;«; plumule at/.
. Beginners botany. Botany. SEEDS AND GERMINATION 25 Germination of Monocotyledons. â Thus far we have stud- ied dicotyledonous seeds ; we may now consider the mono- cotyledonous group. Soak kernels of corn. Note that the micropyle and hilum are at the smaller end (Fig. 24). Make a longitudinal section through the narrow diameter; Fig. 25 shows it. The Jl ^â â wm 1 a4>S 1 h-\^ Fig. 25. âKernel Fig. 24.âSprout- OF Indian Corn. ing Indian Corn. Caulicle at b\ cotyle- Hilum at//; micro- don at a; plumule pyle at d. at/.. Fig. 26.âIndian Corn. Caulicle at c; roots emerging at ;«; plumule at/. single cotyledon is at «, the caulicle at b, the plumule at/. The cotyledon remains in the seed. The food is stored both in the cotyledon and as endosperm, chiefly the latter. The emerging shoot is the plumule, with a sheath- ing leaf (/, Fig. 26). The root is emitted from the tip of the caulicle, c. The caulicle is held in a sheath (formed mostly from the seed-coats), and some of the roots escape through the upper end of this sheath (;;/, Fig. 26). The ^ VT- epicotyl elongates, particularly if '^fffl , the seed is planted deep or if it is kept for a time confined. In Fig. 27 the epicotyl has elongated from n to p. The true plumule-leaf is at o, but other leaves grow from its sheath. In Fig. 28 the roots are seen emerging from the two ends of the caulicle-. 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 Bailey, L. H. (Liberty Hyde), 1858-1954. Toronto : Macmillan
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1921
