By U. B. Sleytr (auth.), Prof. Dr. Oswald Kiermayer (eds.)
In 1958 E. BUNNING released a ebook within the former sequence "Proto plasmatologia" entitled "Polaritat und inaquale Teilung des pflanzlichen Protoplasten" (polarity and unequal department of the plant protoplast) within which for the 1st time result of experimental plant cytomorphogenesis have been re considered. This booklet used to be dependent thoroughly on mild microscopic observations and quite uncomplicated experimental recommendations. on account that then our wisdom of easy cytomorphogenetic mechanisms has vastly elevated, specially with the advent of recent ultrastructural, biochemical and complex experi psychological equipment in order that the sector of cytomorphogenesis in our days could be thought of a separate self-discipline in the normal box of mobile biology. This e-book, "Cytomorphogenesis in Plants", represents an important try and compile present wisdom during this box of study on a related foundation. regrettably huge, immense gaps in our figuring out of the underlying rules of cytomorphogenetic occasions nonetheless exist. as a result it appeared cause capable of current a publication composed of person chapters, each one written by way of specialists for an outlined experimental process. each one bankruptcy signify a separate treatise with its personal references, consequently it used to be impossible to prevent a few overlap either within the textual content and within the literature of the chapters with out destroying the uni formity of the respective article.
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In 1958 E. BUNNING released a publication within the former sequence "Proto plasmatologia" entitled "Polaritat und inaquale Teilung des pflanzlichen Protoplasten" (polarity and unequal department of the plant protoplast) during which for the 1st time result of experimental plant cytomorphogenesis have been re seen. This e-book was once dependent thoroughly on mild microscopic observations and relatively basic experimental options.
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Fig. 2. Pleurochrysis scale, negatively stained with uranyl acetate. The amorphous polysaccharide has been hydrolyzed so that the quadriradial network and spiral microfibrils would be more evident. Note the "breakage loci" at the center of the scale (arrows). From BROWN and ROMANOVICZ 1976. Courtesy of J. Wiley. X 35,600. Fig. 3. Pleurochrysis scale, after extraction with 1 N HCl, negatively stained with phosphotungstic acid. The spiralling band pattern is apparent in the upper right quadrant. From ROMANOVICZ and BROWN 1976.
Under optimal conditions, one scale is released every two minutes (BROWN 1969), implying fusion of Golgi cisternae with the plasma membrane at the same rate. For the cell to avoid a rapid increase in volume, most of the cisternal membrane must be recycled. BROWN and ROMANOVICZ (1976) suggested involvement of the extensive subsurface cisterna in this recycling process, based upon the localization of acid phosphatase activity in the distal Golgi cisterna and the subsurface cisterna, resembling the GERL system proposed by NOVIKOFF and colleagues (1971, NOVIKOFF and NOVIKOFF 1977).
Con gr. Electr. , Toronto, 2, 346-347. GLAUERT, A. , 1975: Analysis of regular arrays of subunits on bacterial surfaces: evidence for a dynamic process of assembly. J. Ultrastruct. Res. 50, 103-116. - 1976: Ultrastructure of the cell walls of two closely related Clostridia that possess different regular arrays of surface subunits. ]. Bacteriol. 126, 869-882. - - 1981: Bacterial cell walls and membranes. In: Electron microscopy of proteins (HARRIS, J. ). New York-San Francisco-London: Academic Press.