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  • 1
    Electronic Resource
    Electronic Resource
    Distribution and function of actin in the developing stomatal complex of winter rye (Secale cereale cv. Puma) (1990)
    Springer
    Protoplasma 157 (1990), S. 154-164 
    Details
    ISSN: 1615-6102
    Keywords: Microfilaments ; Cytochalasin B ; Stomatal complex ; Nuclear positioning ; Cytokinesis ; Immunofluorescence microscopy ; Secale
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The dynamics of actin distribution during stomatal complex formation in leaves of winter rye was examined by means of immunofluorescence microscopy of epidermal sheets. This method results in actin localization patterns that are the same as those seen with rhodamine-phalloidin staining, but are more stable. During stomatal development MFs are extensively rearranged, and most of the time the orientation or placement of MFs is distinctly different from that of MTs, the exception being co-localization of MTs and MFs in phragmoplasts. Although MFs show an orientation similar to that of MTs in interphase guard mother cells, no banding of MFs into anything resembling the interphase MT band is observed. From prophase to telophase, a distinct, dense concentration of MFs is found in subsidiary cell mother cells (SMCs) between the nucleus and the region of the cell cortex facing the guard mother cell. Cytochalasin B treatment causes incorrect positioning of the SMC nucleus/daughter nuclei and abarrent placement and orientation of the new cell wall that forms the boundary of the subsidiary cell at cytokinesis. These results suggest that MFs are involved in maintaining the SMC nucleus in its correct position and the SMC spindle in the correct orientation relative to the division site previously delineated by the preprophase band. Because these MFs thus appear to assure that the SMC phragmoplast begins to form in the correct orientation near the division site to which it needs to grow, we suggest that MFs are involved in control of correct placement and orientation of the new cell wall of the subsidiary cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01322648
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  • 2
    Electronic Resource
    Electronic Resource
    Actin in the developing stomatal complex of winter rye: A comparison of actin antibodies and Rh-phalloidin labeling of control and CB-treated tissues (1991)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 19 (1991), S. 25-36 
    Details
    ISSN: 0886-1544
    Keywords: immunofluorescence ; Rh-ph ; mitosis ; cytochalasin B ; stomates ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Actin localization during stomatal complex formation in rye leaf epidermis was compared by three different labeling procedures. When leaf segments are fixed with formaldehyde prior to staining microfilament (MF) patterns visualized with actin antibodies and those with rhodamine-phalloidin (Rh-ph) are basically identical in controls. Likewise, on tissues treated with cytochalasin B (CB), actin antibodies and Rh-ph produce very similar labeling patterns. Compared to MF alignments in fixed samples, additional sets of MFs are observed at the very cortical regions of epidermal cells that are stained with Rh-ph without aldehyde fixation. Cortical MFs are also present in a variety of mitotic cells; MFs of meristematic cells and guard mother cells are more concentrated near the walls facing spindle poles, whereas a fine meshwork of MFs is observed along the entire periclinal surface of subsidiary mother cells. Although exactly how MFs are involved in control of the division site in higher plant cells is still to be determined, the presence of MFs during mitosis and the abnormal division observed in some stomatal cells after treatment with CB suggest that MFs are necessary for normal orientation of division in these cells, and thus normal morphogenesis.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cm.970190105
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  • 3
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    Ataxia telangiectasia mutated inhibits oxidative stress-induced apoptosis by regulating heme oxygenase-1 expression (2015)
    Elsevier
    Details
    Publication Date: 2015-03-01
    Print ISSN: 1357-2725
    Electronic ISSN: 1878-5875
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Published by Elsevier
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