Archive image from page 93 of The cytoplasm of the plant. The cytoplasm of the plant cell cytoplasmofplant00guil Year: 1941 A P oOOq oqOO Fig. 42 (left). — Epidermal cells of living young anther of Iris germanica, showing refracting mitochondria, chondrioconts and strongly refracting lipide granules. The two lower cells contain chondrioconts with small compound starch grains (A) on their long axes. Fig. 43 (right). — Epidermal cells of leaves of Iris germanica. A comparison of the chondriome in (6) a living cell with (a) one fixed by Regaud's method, showing that the chondrioconts in (a) corr
Archive image from page 93 of The cytoplasm of the plant. The cytoplasm of the plant cell cytoplasmofplant00guil Year: 1941 A P oOOq oqOO Fig. 42 (left). — Epidermal cells of living young anther of Iris germanica, showing refracting mitochondria, chondrioconts and strongly refracting lipide granules. The two lower cells contain chondrioconts with small compound starch grains (A) on their long axes. Fig. 43 (right). — Epidermal cells of leaves of Iris germanica. A comparison of the chondriome in (6) a living cell with (a) one fixed by Regaud's method, showing that the chondrioconts in (a) correspond to the plastids in (b) ; that the rod-shaped and granular chondriosomes are similar in the two cells; that the lipide granules appear only in (b). c, d, e, similar portions of the cell showing (c, e,) starch bearing plastids in living and fixed material (Regaud's method) respectively: d, plastids not forming starch; /, g, successive stages in the vesiculation of living plastids, C, chondriosomes; P, chondriocont, plastid; Gl, lipide granules; A, starch. ment of the epidermis of the perianth. It is made up of a con- siderable number of very elongated chondrioconts and granular mitochondria. The bases of the perianth parts are almost always yellow and, on examining the epidermis in this region, it is seen that it is the chondrioconts which serve as substratum for the xanthophyll pigment and consequently represent the chromoplasts. The mitochondria, on the contrary, remain colorless. In yellow flowers, however, the chondrioconts in all parts of the epidermis appear yellow because of the xanthophyll. In living epidermal cells of the perianth and those of the exo- carp of fruit of monocotyledons, the chondriosomes can be observed with greatest ease and the formation of carotinoid pigments fol-
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Keywords: 1940, 1941, archive, atkinson_lenette_may_rogers_1899_, book, bookauthor, bookdecade, bookpublisher, booksponsor, booksubject, bookyear, drawing, guilliermond_alexandre_1876_, historical, history, illustration, image, mblwhoi_library, page, picture, plant_cells_and_tissues, print, protoplasm, reference, vintage, waltham_mass_chronica_botanica_company, zimmermann_a_albrecht_b_1860
