Shokubutsugaku Zasshi
Online ISSN : 2185-3835
Print ISSN : 0006-808X
ISSN-L : 0006-808X
Volume 56 , Issue 668
Showing 1-5 articles out of 5 articles from the selected issue
  • R. KANEHIRA, S. HATUSIMA
    1942 Volume 56 Issue 668 Pages 355-373
    Published: 1942
    Released: May 30, 2007
    JOURNALS FREE ACCESS
  • Naohide Hiratsuka
    1942 Volume 56 Issue 668 Pages 374-382
    Published: 1942
    Released: May 30, 2007
    JOURNALS FREE ACCESS
  • Seibin ARASAKI
    1942 Volume 56 Issue 668 Pages 383-391
    Published: 1942
    Released: May 24, 2007
    JOURNALS FREE ACCESS
    1. Acetabularia Calyculus QUOY et GAIMARD which grows along the coast of Tita Peninsula (Aiti Prefecture) was used of observations.
    The plant is monoecious. In August, many cysts (gametangia) which are freed from the sporangia of a fertile whorl (umbrella) liberate the gametes without coming to rest. The gamete is pear-shaped or somewhat rectangular in form when viewed along the dorsal direction.
    2. After germination the zygote develops into a short thread with no septa. It, however, grows rapidly in the next spring and bears many sterile whorls. In summer, it attains its maximum size becoming an adult bearing an “umbrella” at its apex.
    The conjugation is seen between the gametes escaped from the plants in culture (f1), and the zygote develops into a plant of the next generation (f2). Next summer, many cysts are formed on the f2-plants, but the further development have not been followed.
    In my culture, the plant is not encrusted with carbonate of lime and, moreover, the apex of the sporangium is not concave.
    3. The development of the sterile hairs is different from that of the fertile branch. The shape of the sterile plant of Ac. Calyculus resembles Batophora Oerstedi. From the standpoints of this resemblance and the lateral position of the sporangia Acetabularia seems to have a nearer relation to Batophora than to Bornetella.
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  • K. NEGORO
    1942 Volume 56 Issue 668 Pages 392-404
    Published: 1942
    Released: May 24, 2007
    JOURNALS FREE ACCESS
    Am 14. September 1941 untersuchte der Verfasser die Diatomeen-vegetation der Isobe-Kochsalzquellen, Gunma Präfektur, Japan. Nach seinen Messungen sind die physikalischen und chemischen Beschaffenheiten der vier untersuchten Quellen wie folgt:
    Quelle I II III IV
    Wassertemperatur (°C) 15.3 17.5 19.2 19.4
    pH 6.5 6.9 7.0 6.7
    Chlorgehalt (g/L) 6.11 12.75 13.79 1.83
    Chlorgehalt auf NaCl
    umgerechnet (g/L) 10.08 21.04 22.75 3.02
    Die Diatomeenvegetation der einzelnen Quellen gibt die folgende Charakteristik:
    I. Die Navicula cryptocephala-Navicula incerta-Surirella ovata-Assoziation, untergeordnet Nitzschia frustulum var. subsalina, Nitzschia obtusa var. scalpelliformis fo. und Pinnularia acoricola.
    II. Die Navicula incerta-Navicula cryptocephala-Assoziation.
    III. Die artreine Assoziation von Navicula incerta.
    IV. Die Navicula cryptocephala-Association, zurücktretend Navicula incerta, Pinnularia Braunii var. amphicephala, Surirella Capronii, Navicula halophila, Nitzschia Clausii und Pinnularia viridis var. teptogongyla.
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  • 1942 Volume 56 Issue 668 Pages 405-420
    Published: 1942
    Released: May 14, 2013
    JOURNALS FREE ACCESS
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