植物学雑誌
Online ISSN : 2185-3835
Print ISSN : 0006-808X
ISSN-L : 0006-808X
69 巻, 816 号
選択された号の論文の7件中1~7を表示しています
  • 阿部 定夫, 田村 輝夫
    1956 年 69 巻 816 号 p. 249-257
    発行日: 1956年
    公開日: 2006/12/05
    ジャーナル フリー
  • 村上 浩
    1956 年 69 巻 816 号 p. 258-262
    発行日: 1956年
    公開日: 2006/12/05
    ジャーナル フリー
    The growth of the green leaf sheath sections excised from young rice leaves occurred in the presence of the sugar such as sucrose. Inorganic salts, organic acids including amino acids, vitamins, and growth hormones were tested for their effects upon the growth of the sections in the presence of 2% sucrose. Auxins inhibited the sucrose-induced growth of the leaf sheath sections at the concentrations that stimulate the growth of coleoptile sections. The growth of the basal tissue of the leaf sheath, where auxin was in excess, seems to be limited by nutrients other than auxin. The writer gratefully acknowledges the advice and helpful criticism which he has received from Prof. T. Miwa and Dr. T. Hayashi during the experiments and in the preparation of this report.
  • モノフェノールの酸化について
    鈴木 米三
    1956 年 69 巻 816 号 p. 263-266
    発行日: 1956年
    公開日: 2006/12/05
    ジャーナル フリー
    1. It was shown that a crude polyphenolase from the subterranean stem of Scopolia japonica oxidizes, in a longer period, p-cresol and phenol but not L-tyrosine.
    2. L-Ascorbic acid and dopa shorten remarkably the induction period in the oxidation of p-cresol and phenol; but they are not effective upon the oxidation of L-tyrosine.
  • 野津 良知
    1956 年 69 巻 816 号 p. 267-272
    発行日: 1956年
    公開日: 2006/12/05
    ジャーナル フリー
    Forking and duplication of the fertile spike are worth noticing abnormalities met in the present study. Forking of the spike was found in Botrychium ternatum, B. japonicum, Osmundopteris, Eubotrychium, Ophioderma and Euophioglossum, and normal fertile spike with additional spikes was found in Eubotrychium and Sceptridium. The following other abnormalities are recognized. They are the occurrence of sporangia on the frond which is ordinarily sterile (Botrychium and O. reticulatum), the transformation of the fertile spike into the sterile frond (Osmundopteris) and the various malformations of the sterile frond (Botrychium and Ophioglossum). A detailed account of the situational relationship between normal and additional spikes is given from the view point of vascular anatomy. In conclusion the writer wishes to express his hearty thanks to Prof. Y. Ogura who gave him many directions, by which the work was carried out. Also, the writer's thanks are due to many others for variable materials.
  • 佐藤 七郎
    1956 年 69 巻 816 号 p. 273-280
    発行日: 1956年
    公開日: 2006/12/05
    ジャーナル フリー
    1. The reduction of TTC in the presence of embryo homogenates of Phaseolus vulgaris was investigated by the colorimetrical determination of the amounts of formazan formed by the reaction under varied experimental conditions, and the results were compared with those obtained with the tissue slices (cf. previous papers).
    2. The rate of TTC reduction was shown to be dependent on the presence of succinic acid in the reaction medium, and it was concluded that this reaction was due to the activity of succinic dehydrogenase in the homogenate.
    3. The rate of TTC reduction was fairly constant for considerable reaction period, and the activity of the succinic dehydrogenase system was conveniently measured by determining the initial rate of formazan production.
    4. In harmony with the above conjecture, the poisons known to inhibit the action of succinic dehydrogenase (malonate, oxaloacetate, pyrophosphate, ferricyanide, arsenite, monoiodoacetate) all inhibited the TTC reduction in the presence of sodium succinate.
    5. The inhibitory action of potassium cyanide on the TTC reduction was demonstrated with homogenates as well as with slices of bean embryo. Sodium azide had no apparent effect on the reduction.
    6. The seemingly contradictory results of other investigators concerning the reduction of TTC and especially the problem of participation of the succinic dehydrogenase on the process were discussed.
  • Non-waxy トウモロコシのQ-酵素
    田中 国治
    1956 年 69 巻 816 号 p. 281-285
    発行日: 1956年
    公開日: 2006/12/05
    ジャーナル フリー
    1. The Q-enzyme from non-waxy maize-seeds (Country Gentleman×Wisconsin No. 690) has been found to produce an amylopectin with longer branching chain than that of amylopectin synthesized by the Q-enzyme of potato, corroborating the previous finding of the author.
    2. An attempt to obtain phytoglycogen by the action upon glycoamylose of the Q-enzyme of the maize-seeds has been found unsuccessful. It appears unlikely to regard glycoamylose as a direct precursor of phytoglycogen.
  • ラン科植物数種の染色体
    大野 林二郎, 橋本 昭巳
    1956 年 69 巻 816 号 p. 286-288
    発行日: 1956年
    公開日: 2006/12/05
    ジャーナル フリー
    1. In the present study, chromosome numbers of 4 species in Orchidaceae were counted by the authors.
    2. Chromosome numbers of Platanthera metabifolia F. Maekawa and P. ophrydioides Fr. Schm. in meiosis were found as n=21 and n=20, respectively. And that of Liparis Kumokiri F. Maekawa in the pollen nuclear division was n=13, and for Cremastra variabilis Nakai it was n=24 in the PMC and 2n=48 in the root tip cells.
    3. Karyologically, the chromosomes of 4 species here reported are all of nearly equal form and size.
    4. The behaviour of chromosomes in meiosis was regular.
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