Archive image from page 74 of The cytoplasm of the plant. The cytoplasm of the plant cell cytoplasmofplant00guil Year: 1941 In the Myxomycetes and Plasmodiophoraceae in which CoWDRY, Lewitsky, and Milovidov have studied the chondriosomes in all stages of development (spores, zoospores, myxamoebae, plasmodia), these elements remain constantly in the state of mitochondria or short rods and never become chondrioconts. During sporogenesis they are distributed among the spores (Fig. 24). The development of the chondriome in one of the Blastocladia- ceae, Allomyces arbusculus, is known from a recen
Archive image from page 74 of The cytoplasm of the plant. The cytoplasm of the plant cell cytoplasmofplant00guil Year: 1941 In the Myxomycetes and Plasmodiophoraceae in which CoWDRY, Lewitsky, and Milovidov have studied the chondriosomes in all stages of development (spores, zoospores, myxamoebae, plasmodia), these elements remain constantly in the state of mitochondria or short rods and never become chondrioconts. During sporogenesis they are distributed among the spores (Fig. 24). The development of the chondriome in one of the Blastocladia- ceae, Allomyces arbusculus, is known from a recent study of WlNS- Low Hatch. In the mycelium the chondriome is represented ex- clusively by long slender chondrioconts which appear to thicken at the extremities of the hyphae. At the time of gametogenesis, walls at the extremities of the hyphae cut off two gametangia, the female being terminal, the male subterminal, both enclosing nu- merous chondrioconts which are more abundant in the female than in the male gametangium. The chondriosomes are distrib- uted about the various nuclei of the two gametangia, forming around each nucleus an en- tangled network of chondrio- conts. Then, at the close of gametogenesis, the chondrio- conts in each gamete undergo a fragmentation by which they are reduced to numerous, very small, mitochondria. These subse- quently grow, then fuse, forming about each nucleus a sort of reticulate mantle which seems to be transformed later into a chro- matic, homogeneous cap ap- pressed to the nucleus on one side (nuclear cap). Each gamete when mature encloses, there- fore, a nuclear cap seemingly of mitochondrial origin, occupying the regions of the cell opposite to the insertion pomt of the flagel- lum. Hatch compares this cap to the limosphere of moss anthero- zoids and to the 'Nebenkern' of some animal spermatozoids (Dip- tera). Nevertheless the mitochondrial origin of this nuclear cap seems still to demand some verification (Fig. 25). The development of
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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
