植物学雑誌
Online ISSN : 2185-3835
Print ISSN : 0006-808X
ISSN-L : 0006-808X
68 巻, 809 号
選択された号の論文の7件中1~7を表示しています
  • 羊歯類前葉体の有極性原形質分離 (4)
    伊倉 伊三美
    1955 年 68 巻 809 号 p. 289-293
    発行日: 1955年
    公開日: 2006/12/05
    ジャーナル フリー
    Carrying out the osmotic experiments for the adult prothallia of Asplenium incisum Thunberg and other three species by the use of the reagents of urea and other fourteen kinds as the plasmolytica, the writer obtained the following results.
    1. The cyto-physiological gradients are demonstrated in the form and duration of plasmolysis, the permeability, the osmotic value, the isotonic and the permeability coefficient, or the deplasmolysis in the cells of fern-prothallium.
    2. The existence of polarities is found in the whole field of the prothallium and also in a single prothallial cell. Concerning the polarity, the writer termed the basal region of the protonema as a basal pole (protonema-pole) and the apical region of the meristem as an apical pole (meristem-pole).
    3. Although the form and duration of plasmolysis are changeable in the same plasmolyticum and mol-solution according to the length of the treatment, the plasmolysis occurs earlier at the basal pole than at the apical one and it extends gradually from the former towards the latter.
    4. The permeabilities of urea and glycerin are considerably high to the prothallial cell, whereas the former is more permeable than the latter at the basal region (urea-type) and less than the latter at the apical one (glycerin-type).
    5. The osmotic value and permeability coefficient are lowest at the basal pole and are apt to increase approaching the meristem where the highest value is found. The isotonic coefficient appears to show the reverse result against the permeability coefficient.
    6. The plastids in the prothallial cell behave themselves as if they indicated the polarity of the cell and reveal the phenomenon of “Systrophe”. clustering in a round lump at the basal pole.
  • Camellia sinensis の屈向性
    三木 寿子
    1955 年 68 巻 809 号 p. 293-298
    発行日: 1955年
    公開日: 2006/12/05
    ジャーナル フリー
    1. In Camellia sinensis, pollen tubes show positive tropism to the fresh style slices while they show negative tropism to the slices of the styles which are steamed for 10 minutes at 60°C, 80°C or 99°C.
    2. Both substances, which are responsible for the positive and the negative tropism, diffuse from styles to agar media within ca. 1 hour, and the former may diffuse through a collodion membrane, while the latter does not diffuse through that membrane.
  • 紅葉の色素
    林 孝三, 阿部 幸頴
    1955 年 68 巻 809 号 p. 299-307
    発行日: 1955年
    公開日: 2006/12/05
    ジャーナル フリー
    1. An verschiedenen rot bis rotbraunen Herbstblattern wurden die Anthocyane mit Hilfe von Papierchromatographie untersucht.
    2. Zu dieser Untersuchung wurden 74 Pflanzen aus 25 Familien herangezogen, welche die schonste Herbstrotung von Blattern im Gebirgsgegenden Mitteljapans auf weisen.
    3. Trotz der Unterschiede in der Pigmentierung war die Anthocyanzusammen-setzung einfach ; der Farbstoff der herbstlich roten Blatter bestand hauptsachlich aus einem Cyanidin-monoglykosid bzw. Chry. santhemin.
  • 滝本 敦
    1955 年 68 巻 809 号 p. 308-314
    発行日: 1955年
    公開日: 2006/12/05
    ジャーナル フリー
    Floral initiation in Silene Armeria, a long day plant, was examined under various light-darkness cycles other than the normal 24 hours' cycle. Artificial light was used. The results are summarized as follows:
    1) Under the cycles of constant dark periods alternating with various light periods, more plants initiated floral primordia, and their developmental stages were also more advanced, with increasing length of the light period. This was also the case when the dark periods were decreasing under cycles of constant light periods followed by various dark periods.
    2) If the light period was less than 12 hours, floral initiation did not occur when the following dark period continued for 14 hours or more, but if the light period was 14 hours or more, floral initiation occurred even when the following dark periods were extended up to 24 hours or more.
  • 佐藤 七郎
    1955 年 68 巻 809 号 p. 315-319
    発行日: 1955年
    公開日: 2006/12/05
    ジャーナル フリー
    The effects of arsenite, pyrophosphate, citrate, pH, 2. 4-D, thickness of slices and cyanide on the TTC reduction in the slices of radicle and hypocotyl of seedlings of Phaseolus vulgaris were examined. Among these reagents and reaction conditions, arsenite, pyrophosphate, cyanide and low pH inhibited the reduction of TTC, while 2. 4-D accelerated it slightly. Citrate had no appearent effect on it. When the slices were thinner than about 150μ no reduction appeared in them even under the best conditions. The inhibition by cyanide and its partial reqersibility were confirmed. It was concluded that the TTC method for the histochemical demonstration of succinic dehydrogenase in plant tissues is reliable, and that the enzyme is distributed in the cells of procambial tissue.
  • 服部 新佐
    1955 年 68 巻 809 号 p. 320-323
    発行日: 1955年
    公開日: 2006/12/05
    ジャーナル フリー
    Mt. Apoi is situated in the island of Hokkaido, ca. 42°N. Lat., 143°E. Long. It consists mostly of serpentine, attaining an altitude of 810m. above sea _level. As shown in the list I, twenty-seven species were found on serpentine, in which eleven species marked with an asterisk (*) are confined to serpentine and the remaining also occur on various substrata other than limestone. In these eleven species, only Barbilophozia barbata belongs to the holarctic element. The others are mostly endemic in Japan and her adjacent regions and considered to be of southern origin, the center of their distributional area being generally in Middle to Southern Japan, where they occur on the bark of trees and shrubs and various rocks other than limestone. Thus there are no essential serpentine-loving hepaticae so far as the present area are concerned.
    At Esamanbetsu north-west of Mt. Apoi, an outcrop of limestone is found on a small scale. Here fourteen species were collected on limestone, as shown in the list II, in which six species are confined to limestone. These six species are endemic in Japan, and its neighbouring territories, where they occur almost exclusively on lime-stone. Thus they may be regarded as calciphile hepaticae.
    It may be a most remarkable fact that few or no hepaticae can occur on both serpentine and limestone rocks, so far as the writer's knowledge is concerned. Generally, hepaticae are hardly tolerant to a certain degree of magnecium as well as excess of calcium in the substrata. The injurious effect of the two rocks is not the same physiologically.
  • カヂイチゴ♀ × ナガバキイチゴ♂について
    神野 太郎
    1955 年 68 巻 809 号 p. 323-326
    発行日: 1955年
    公開日: 2006/12/05
    ジャーナル フリー
    1. The results of the research on the fertility, characteristics and pairing of the chromosomes in the reduction division in P.M.C. of the F1-hybrid which is raised artificially by crossing R. trifidus(_??_) and R. palmatoides (_??_) are given.
    2. The chromosomes at the metaphase I in P.M.C. pair well but one or two pairs are loose in the union of chromosomes.
    3. The pollen fertility of the F1-hybrid is rather high, namely the rate of the pollen having contents is 91%.
    4. The F1-hybrid is fertile but the average percentage of the fertility in the nature (24%) is lower than those of the parents (65% and 50%).
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