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  • 1
    Electronic Resource
    Electronic Resource
    Thylakoid membranes in sunflower and in other plants
    Amsterdam : Elsevier
    Journal of Ultrasructure Research 65 (1978), S. 30-35 
    Details
    ISSN: 0022-5320
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0022-5320(78)90019-9
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Morphogenesis of membrane-bound bodies in belladonna (Atropa belladonna L.) plastids
    Amsterdam : Elsevier
    Journal of Ultrasructure Research 61 (1977), S. 186-192 
    Details
    ISSN: 0022-5320
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0022-5320(77)80085-3
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Patterns of thylakoid system formation
    Amsterdam : Elsevier
    Journal of Ultrasructure Research 69 (1979), S. 307-315 
    Details
    ISSN: 0022-5320
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0022-5320(79)80049-0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Sunflower etioplast membranes
    Amsterdam : Elsevier
    Journal of Ultrasructure Research 68 (1979), S. 325-327 
    Details
    ISSN: 0022-5320
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0022-5320(79)90164-3
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Flowers of Orontium aquaticum L.: membrane rearrangement in chloroplast-chromoplast interconversions
    Amsterdam : Elsevier
    Journal of Ultrasructure Research 81 (1982), S. 202-208 
    Details
    ISSN: 0022-5320
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0022-5320(82)90076-4
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Cotyledon greening in hypogeal seeds of citrus fruits
    Amsterdam : Elsevier
    Journal of Ultrastructure Research and Molecular Structure Research 101 (1988), S. 13-22 
    Details
    ISSN: 0889-1605
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0889-1605(88)90078-X
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Cellulase and polygalacturonase involvement in the abscission of leaf and fruit explants of peach (1992)
    Springer
    Plant molecular biology 20 (1992), S. 839-848 
    Details
    ISSN: 1573-5028
    Keywords: cellulase ; ethylene ; fruit abscission ; leaf abscission ; polygalacturonase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ethylene-induced abscission in leaf and fruit explants of peach involves different enzymes. In leaves abscission is accompanied by increased occurrence of cellulase forms differing in isoelectric point (pI 6.5 and 9.5). A polypeptide with a molecular mass of 51 kDa gives in a western blot a strong cross-reaction with an antibody raised against a maturation cellulase from avocado fruit. Cellulase activity is also found in abscising fruit explants but the amount is very low compared to that of the leaf explants. A northern analysis with a cellulase clone from avocado reveals the presence of two hybridizing mRNAs with a size of 2.2 kb and 1.8 kb, respectively. The steady-state level of the 2.2 kb mRNA is significantly increased by treatment with ethylene. Polygalacturonases are not detected in abscising leaves, but are strongly induced by ethylene in fruit explants. Of the three forms found, two are exopolygalacturonases while the third is an endoenzyme. Ethylene activates preferentially the endoenzyme and the basic exoenzyme but depresses the acid exopolygalacturonases. A northern analysis carried out with a cDNA coding for tomato endopolygalacturonase shows hybridization only with one endopolygalacturonase mRNA from in the fruit abscission zone. Treatment with ethylene causes an increase in the steady-state level of this mRNA. The differences in the enzyme patterns observed in fruit and leaf abscission zones and a differential enzyme induction suggest the feasibility to regulate fruit abscission in peach with the aid of antisense RNA genes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027155
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  • 8
    Electronic Resource
    Electronic Resource
    Chloroplast ontogenesis inHelianthus annuus L. (1978)
    Springer
    Protoplasma 97 (1978), S. 165-172 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Research carried out into successively older sunflower leaves has allowed us to follow the different ontogenetic stages leading to the building up of a well-differentiated chloroplast. In all the intrathylakoid compartments of the young plastids there is very electron-dense material whose accumulation causes the dilatation of some thylakoid profiles and, consequently, the forming of roundish bodies. The thylakoid membranes appear as “Lithtly Stained Membranes” which, according to the most recent interpretation, are considered as incompletely organized ones. At a subsequent stage there is an increase of the thylakoid membrane staining along with a decrease of the electron-density of the intrathylakoid compartments that, at the end of the ontogenetic process, appear electrontransparent and flattened. Therefore, the intrathylakoid material appears to have been used up in the forming of well-organized membranes. This particular situation, present in the early ontogenetic stages of the plastids, may be attributed to an initial disequilibrium between the synthesis speed of membranal material and the capability to build up well-organized membranes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276691
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Etioplast-chloroplast transformation in maize leaves: Effects of tissue age and light intensity (1984)
    Springer
    Protoplasma 119 (1984), S. 110-120 
    Details
    ISSN: 1615-6102
    Keywords: Plastid greening ; Zea mays ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The effects of light intensity and cell age on the greening of etioplasts were studied in seedlings of maize. We could see that in the youngest tissues examined by us the etioplast greening is very fast and occurs according to a particular pattern which is characterized by the contemporary presence of grana and large non crystalline prolamellar bodies. On the contrary, in the oldest examined tissues the etioplast greening is slow and the formation of grana appears to be delayed and subsequent to the using up of the prolamellar bodies. In the young tissues the intensity of the light mainly affects the duration of the lag-phase preceding the chlorophyll accumulation, while in the old tissues it also affects the total amount of chlorophyllous pigments, the restraining effect of the light appearing amplified by a concomitant restraining effect of cell age.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01287823
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  • 10
    Electronic Resource
    Electronic Resource
    Ultrastructural study of an olive necrotic mutant of maize (1981)
    Springer
    Protoplasma 105 (1981), S. 241-249 
    Details
    ISSN: 1615-6102
    Keywords: Olive necrotic mutants ; Plastid aberrations ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Ultrastructural surveys, carried out into an olive necrotic maize mutant (Neuffer E 283 B) grown under a 16 hours photoperiod, have shown remarkable morphological alterations in the plastids. Such alterations, affecting both the mesophyll and the bundle sheath plastids, appear to be photodependent. Quite normal etioplasts are present in dark-grown mutant seedlings. Moreover, light appears also to inhibit the overall growth of mutant plants. 12-day-old mutant plants grown under illumination are 4 cm in comparison with the 10 cm of the wild type, while corresponding dark-grown seedlings of both types are 12 cm high.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01279222
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