. Botanical microtechnique. Botany -- Anatomy; Botany -- Morphology; Microscopy -- Technique; Microscopes -- Technique; Botany; Plants -- anatomy & histology; Microscopy. Reproductive Structures of Vascular Plants 175 /;) ; the origin and development of the ovule and integuments (Fig. ); the origin and enlargement ol the megasporocyte (Fig. ); meiosis, (Fig. ) and the four megaspores in the unparti- tioned embryo sac (Fig. ). It is of interest that the embryo sac of Liliiim pardalinum is narrow and the megaspores are in linear order, whereas L. iimbellatum has a broad
. Botanical microtechnique. Botany -- Anatomy; Botany -- Morphology; Microscopy -- Technique; Microscopes -- Technique; Botany; Plants -- anatomy & histology; Microscopy. Reproductive Structures of Vascular Plants 175 /;) ; the origin and development of the ovule and integuments (Fig. ); the origin and enlargement ol the megasporocyte (Fig. ); meiosis, (Fig. ) and the four megaspores in the unparti- tioned embryo sac (Fig. ). It is of interest that the embryo sac of Liliiim pardalinum is narrow and the megaspores are in linear order, whereas L. iimbellatum has a broad embryo sac and a cruciate quartet (Fig. ). The so-called normal type, which might better be named the common type, involves the formation of a cjuartet of megaspores, three of which degenerate, the fourth giving rise to the female gametophyte. This type occurs in maize, the legumes, tomato, and many other economic plants. The preparation of each of these is virtually a research task, and the reader who wishes to work on any of these plants should survey the literature on the desired plant. Lilium is a good subject for making preparations showing fertili- zation (Fig. ). Begin collecting 48 hr. after pollination and make collections e\ery 12 hr. Use the killing fluids and methods recommended for the embryo sac. A series of collections will show stages from unfertilized mature embryo sac to young embryos (Fig. fl). ^JV^4i3. ^^^ 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 Sass, John E. (John Eugene), 1897-1971. Ames, Iowa State College Press
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Keywords: ., bookcentury1900, booksu, booksubjectbotany, booksubjectmicroscopy
