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...
متن کاملSpeaker 3: Sung Yon Kim, Republic of Korea
Genome editing techniques have revolutionized the way that researchers study genes and their functions in eukaryotic systems and model species. Here we report the development of the whole genome CRISPR/Cas knockout library and its application in the identification of new drug targets through function-based screening and high-throughput sequencing analysis. Representative screenings will be pres...
متن کاملPhycoremediation of Heavy Metals by Chlorella pyrenoidosa and Spirogyra communis
Environmental contamination by heavy metals is a serious problem due to their incremental accumulation in the food chain. Unlike most organic wastes and the microbial load in aquatic bodies, metal contaminants are not biodegradable, tending to accumulate in living organisms, thus becoming a permanent burden on ecosystems (Bayo, 2012). Most heavy metals are transition elements with incompletely ...
متن کاملEffect of Ions on the Orientationof CorticalMicrotubules in Spirogyra Cells
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 ...
متن کاملSynthesis of a callosic substance during rhizoid differentiation in Spirogyra.
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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ژورنال
عنوان ژورنال: Flora oder Allgemeine Botanische Zeitung
سال: 1905
ISSN: 0367-1615
DOI: 10.1016/s0367-1615(17)31599-9