. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. Fig. 27 (left). — Development of the chondriome in Leptomitus. 1, chondrioconts in the vegetative filament: 2, 3. fragmentation of the chondrioconts and grouping about the nuclei during the formation of the zoospores; 4, granular chondriosomes in the zoospores; 5-7, ger- mination of the zoospores, elongation of chondriosomes into chondrioconts. C. chondriocont. N, nucleus. Meves' method, stained with acid fuchsin. Fig. 28 (right). — Development of the chondriome in the ascus of Pustularia vesiculosa. 1. very young ascus af
. The cytoplasm of the plant cell. Plant cells and tissues; Protoplasm. Fig. 27 (left). — Development of the chondriome in Leptomitus. 1, chondrioconts in the vegetative filament: 2, 3. fragmentation of the chondrioconts and grouping about the nuclei during the formation of the zoospores; 4, granular chondriosomes in the zoospores; 5-7, ger- mination of the zoospores, elongation of chondriosomes into chondrioconts. C. chondriocont. N, nucleus. Meves' method, stained with acid fuchsin. Fig. 28 (right). — Development of the chondriome in the ascus of Pustularia vesiculosa. 1. very young ascus after nuclear division; 2-4, vesiculation of the chondriosomes during growth of the ascus. 5. first mitosis; 6, fragment showing clear zone about each nucleus corresponding to the aster; 7, formation of the ascospores; 8, young ascospores; 9, older ascospores. C, centrosome; N, nucleus. Meves' method. We have been able to observe the chondriome in some living fungi: Endomyces Magnusii, Saccharomycodes Ludwigii but the Saprolegniaceae are particularly favorable for this type of study, as we have shown in our research. Meyer as early as 1904 ob- served living chondriosomes in Achlya and described them as leuco- plasts. We have since been able to follow with very great clearness the entire development of the chondriome from the germination of the zoospores to the formation of the zoosporangia in several living fungi of this group: Saprolegnia, Achlya, Leptomitus. The sexual cycle has not been studied as sexual reproduction is not easy to obtain in culture (Guilliermond). This study has confirmed results obtained with mitochondrial technique and has thus very emphatically shown that the chondrio-. 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 Guilliermond, Alexandre, 1876-; Atkinson, Lenette May Rogers, 1899
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