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Volume 75, Issue 891
Displaying 1-6 of 6 articles from this issue
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Yozo IWANAMI1962 Volume 75 Issue 891 Pages 331-335
Published: 1962
Released on J-STAGE: December 05, 2006
JOURNAL FREE ACCESSAfter the Portulaca stamen is stopped artificially during its movements, it keeps ability making its original movement in its original pace (Figs. 1 and 2). This shows that during the obstruction the internal changes of the cells and tissues of the filament take place just as in a normal movement.
The epidermal cells of the filament have papillae. The papillae of the cells at the base of the filament are very big and in this big papilla the protoplasm makes streaming movement. The speed of it is about 3.4μ per second (Figs. 3 and 4).
There is a gaseous substance within the filament. The author thinks that the gaseous substance is scattered in the intercellular space of the parenchyma and that it has some kind of relations to the movements of the Portulaca stamen (Fig. 5).View full abstractDownload PDF (1019K) -
Tuguo TATEOKA1962 Volume 75 Issue 891 Pages 336-343
Published: 1962
Released on J-STAGE: December 05, 2006
JOURNAL FREE ACCESSAn attempt has been made to provide a more natural grouping of Festuceae based mainly on morphological studies. Particular attention has been paid to the features of flowers and caryopses. The results of anatomical and histological examination of leaf-blades of Gymnachne and Aphanelytrum have been reported. When necessary, information on flower and caryopsis morphology is related to the systematic revision or affinity of some controversial genera. 54 genera are enumerated in Festuceae, and their geographical distribution has been discussed in connection with the evolutionary history of this tribe.View full abstractDownload PDF (1151K) -
Hideo YAMAGISHI1962 Volume 75 Issue 891 Pages 344-348
Published: 1962
Released on J-STAGE: December 05, 2006
JOURNAL FREE ACCESSThe cytoplasmic granules of Hydrodictyon reticulatum were studied morphologically and cytochemically. They are spherical, 0.5-1.0μ in diameter, stain with neutral red and are rich in lipid. It seems that these granules correspond to the so-called spherosomes of Perner, but unlike spherosomes they have no cytochrome oxidase activity. Besides these granules, mitochondria were distinguished. The mitochondria are rod-shaped, 1.0-1.5μ in length, give a positive modified Nadi reaction and stain with Janus green B.View full abstractDownload PDF (1480K) -
Ikujirô FUKUDA1962 Volume 75 Issue 891 Pages 349-355
Published: 1962
Released on J-STAGE: December 05, 2006
JOURNAL FREE ACCESS1) The metabolic activities of a thermo- and acidophilic blue green alga, Cyanidium caldarium Geitler, were investigated with special reference to its phototrophic activities, photosynthesis and Hill-reaction.
2) The organism utilizes as the Hill oxidants, various substances including Hill mixture, p-quinone, Cr-oxalate and 2, 6-DPIP, in the order of decreasing rate of reaction.
3) The temperature dependency of the Hill-reaction in this organism was investigated. The optimum temperature of the reaction was found to lie at 50° to 55° the reaction rate showing a sharp drop on either side of this maximum point. The reaction rate was found to be makedly suppressed even at the range of moderate temperatures favorable for the ordinary mesophills (around 30°), and there was no detectable activity of the Hill-reaction at 25°.
4) The apparent activation energy for the Hill-reaction in this organism was found to be 17 Kcal (between 55°_??_35°), and about 45 Kcal (between 35°_??_30°).
5) The heat-stability of metabolic activities of the algal cells were compared. The photosynthesis and Hill-reaction were found to be affected by the heat treatment at 60° (10minutes) by about 50% and 30%, respectively. On the contrary, the respiratory oxygen uptake was accelerated by about 50% by same heat-treatment.
6) The cell homogenate was found to retain the capacity for the Hill-reaction. No activity of photosynthesis was detected in the cell homogenate.View full abstractDownload PDF (782K) -
Hisao ARANO1962 Volume 75 Issue 891 Pages 356-367
Published: 1962
Released on J-STAGE: December 05, 2006
JOURNAL FREE ACCESS1. The karyotypes of eight species in the genus Artemisia were studied by the smear method with the pretreatment of 8-oxyquinoline.
2. The chromosome numbers of A. apiacae and A. montana are here reported for the first time, and for A. montana, a number different from the previous determinations has been recorded.
3. Based on the karyotypical stand point, A. princeps and A. montana seem to be amphidiploid forms of a basic number of 17 and 26, respectively.
4. The common karyotypical characteristics of the genus Artemisia are represented by the existence of a pair of short chromosomes with subterminal constrictions and of the larger chromosomes which have the secondary and terminalized primary constrictions. And the karyotype is generally symmetrical.
5. A. montana may be derived from some species with the same chromosome number of 2n =18 as in A. stelleriana by a loss of a pair of trabants of median-sized chromosomes which have secondary constrictions and show variations in some other minute karyotype details.
6. The basic chromosome number of most species in the genus Artemisia appears to be 9. However, in A. Feddei, a diploid number of 16 was observed. Some species with higher chromosome numbers (2n =34, 52) are presumably of amphidiploid origin.View full abstractDownload PDF (1857K) -
Yukio YAMAMOTO, Hideo OHYAMA1962 Volume 75 Issue 891 Pages 368-369
Published: 1962
Released on J-STAGE: December 05, 2006
JOURNAL FREE ACCESSDownload PDF (199K)
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