. Botany for high schools and colleges. Botany. 100 BOTANY. â the mother-cell is formed a median partition-wall forms in it, and gradually becomes separated into two plates, which eventually sepa- rate and form a pore through the epidermis. The two halves of the mother-cell be- come symmetrical- ly rounded off into semilunar or semi- circular forms, and constitute the guard-cells before mentioned. The details of the fore- going process in one of its more complex forms are illustrated in Fig. 91, A and B. The splitting of the middle partition-wall of the mother-cell is shown in the successive s
. Botany for high schools and colleges. Botany. 100 BOTANY. â the mother-cell is formed a median partition-wall forms in it, and gradually becomes separated into two plates, which eventually sepa- rate and form a pore through the epidermis. The two halves of the mother-cell be- come symmetrical- ly rounded off into semilunar or semi- circular forms, and constitute the guard-cells before mentioned. The details of the fore- going process in one of its more complex forms are illustrated in Fig. 91, A and B. The splitting of the middle partition-wall of the mother-cell is shown in the successive sections (Fig. 92). 132.âIn the light, under certain conditions of moisture and temperature, the. Fig. 89.âStomata from the under surface of the leaf of Echmoaystis Mala. «, s, stomata; g, g, irregular epider- mis-celle between the veins of the leaf'; «, elongated and regular epidermis-cells over a vela. X 250.âFrom a drawing hy J. C. Arthur. ii^^l guard-cells become curved away from each other in their central portions, thus opening the slit and allowing free communication between the external air and that in the in- tercellular spaces and passages of the leaf. (a) A superficial examination of stomata may be easily made by stripping off the epidermis, and mounting it in water or alcohol. Good sections of stomata are more difficult to make ; they may be obtained,. 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 Bessey, Charles E. (Charles Edwin), 1845-1915. New York : H. Holt
Size: 1488px × 1679px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1888
