. Carnegie Institution of Washington publication. . Fig. 1.—Dividing cells in chick embrjo. Fig. 2.—Meristem and young and old cortical cells of the |iea. A-E in mitosis and f-j in apparent amitosis. showing primary diffuse arrangement of mitochondria (a), secondary condensation about the nucleus (b), and final even distribution throughout the cytoplasm (c). (.Wter N. H. Cowdry.) Perinuclear condensations of mitochondria occur in both plants and animals. In the early meristem of plants, generally, mitochondria are found indifferently distributed in the protoplasm. They seem to approach and com
. Carnegie Institution of Washington publication. . Fig. 1.—Dividing cells in chick embrjo. Fig. 2.—Meristem and young and old cortical cells of the |iea. A-E in mitosis and f-j in apparent amitosis. showing primary diffuse arrangement of mitochondria (a), secondary condensation about the nucleus (b), and final even distribution throughout the cytoplasm (c). (.Wter N. H. Cowdry.) Perinuclear condensations of mitochondria occur in both plants and animals. In the early meristem of plants, generally, mitochondria are found indifferently distributed in the protoplasm. They seem to approach and come in actual con- tact with the nucleus, in which position they enlarge and form plasts which migrate away from the nucleus and become distributed more or less evenly in the surround- ing cytoplasm. Guilliermond has repeatedly described this migration and finds that the mitochondria become more and more resistant to acetic acid during this process of plast formation. Similarly, in the spermatogonia of certain animals the mitochondria make their way to the nucleus and become so closely applied to it that investigators have been deluded into thinking that they actually originate. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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