Conjugation between Spirogyra ternata Ripart and Spirogyra Fuellebornii Schmidle
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چکیده
منابع مشابه
Some observations on the nucleolus in Spirogyra.
Several species of Spirogyra have been collected and fixed for electron microscopy in either 2 % osmium tetroxide or 5 % glutaraldehyde. Mitotic cells were selected with the light microscope from filaments of Spirogyra embedded in Epon. Evidence is given for an interphase cycle in the nucleolus of Spirogyra. A clear association between nucleolar material and chromosomes occurs at mitosis. The b...
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Effects ef ions on the orientation of cortical microtubu]es (MTs) in spirogyra cells were studied. After depotymerization with amiprophos-methyl (APM), MTs were atlowed to reorganize in NaCl sollltions of yarious concentrations. As the conce"tration of NaCl increased, the frequency of ce]ls that had oblique MTs increased. When ce]ls in NaCl solution vvere transferred into artificia) pond water ...
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Spirogyra living in running water is anchored to the substratum by rhizoids that form at the ends of the filaments. A new terminal cell differentiates into a rhizoid cell if the filament is injured. The mode of growth changes from diffuse to tip growth when rhizoid differentiation begins. In this study, we found that a callosic substance was synthesized during rhizoid differentiation. Decreasin...
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Localization of phytochrome which mediates rhizoid differentiation in Spirogyra was investigated. The red-absorbing form of phytochrome (Pr) seems to be distributed all over the cell periphery which remained in the centripetal end part after the centrifugation, as rhizoids formed equally well with red spotlight irradiation of three different parts of an end cell, i.e. distal end, middle, and pr...
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ژورنال
عنوان ژورنال: Acta Societatis Botanicorum Poloniae
سال: 2015
ISSN: 2083-9480
DOI: 10.5586/asbp.1964.035