植物学雑誌
Online ISSN : 2185-3835
Print ISSN : 0006-808X
ISSN-L : 0006-808X
84 巻 , 992 号
選択された号の論文の8件中1~8を表示しています
  • Noboru KAWAKAMI
    1971 年 84 巻 992 号 p. 35-40
    発行日: 1971年
    公開日: 2006/10/31
    ジャーナル フリー
    On a mixed culture of Physarum polycephalum and Candida utilis, yeast cells ingested in the living plasmodium are digested, and remnants of the cell wall are found in the plasmodium in addition to cells in an almost intact form with intracellular highly dense substances. When growing yeast cells are treated with an extract from plasmodia the cell wall and intracellular substances are also disintegrated. The digestion, however, did not advance to produce spheroplasts or protoplasts under the condition employed in this experiment.
  • Minoru TANAKA, Saheye NAKAMURA, Kazutosi NISIZAWA, Tomoo MIWA
    1971 年 84 巻 992 号 p. 41-50
    発行日: 1971年
    公開日: 2006/10/31
    ジャーナル フリー
    γ-Hydroxy-γ-methylglutamic acid (γ-HMGA) was found to occur abundantly in nine species out of eighteen fern plants examined, but no correlation was recognized between the existence of this amino acid and the taxonomic position of the ferns. In ferns containing γ-HMGA, its amount exceeded that of other free amino acids at earlier stages of the development, but decreased gradually in the course of growth, while the contents of glutamic acid and/or glutamine increased and became dominant amino acids in place of γ-HMGA. In ferns lacking γ-HMGA, however, glutamic acid and/or glutamine were the major free amino acids hroughout the growth. The presence of a substance that appears to beγ-methyleneglutamic acid was detected inAdiantum pedatum, though in a very small quantity.
  • Mitsuko SAWADA
    1971 年 84 巻 992 号 p. 51-60
    発行日: 1971年
    公開日: 2006/10/31
    ジャーナル フリー
    vascular system in Paeonia japonica (Makino) Miyabe et Takeda was studied with the special reference to the vascular relationships between foliage leaf traces and reproductive floral parts. In the floral axis, a central vascular ring and five cortical strands were observed. The central vascular ring provides traces for petals, stamens and carpels. The cortical strands provides traces mainly for sepals, petals and some extent of stamens as well. The leaf traces give rise to cortical strands of the floral axis above the node of the uppermost foliage leaf. Both arrangement of foliage leaves and order of sepals are maintained spirally in a 2/5 phyllotaxis, but its spiral order becomes inconspicuous at the inner floral parts of petals and stamens having more tendency to be whorled. In addition, tepals of three types were observed according to their vascularization; the sepaline tepal, petaline tepal and transitional tepal. No centrifugality was observed in development of androecium.
    The Paeoniaceae should be replaced from Guttiferales to Magnoliales based on the results of floral vascular anatomy.
  • Noboru HARA
    1971 年 84 巻 992 号 p. 61-68
    発行日: 1971年
    公開日: 2006/10/31
    ジャーナル フリー
    This report is concerned with quantitative treatments for plastochronic changes of the apex in superficial view as a supplement to the first paper7) of the present series, which dealt with the anatomical analysis of superficial and transectional views of the vegetative shoot apex of Clethra barbinervis Sieb. et Zucc. The bases of young leaf primordia directly surrounding the apex may be expanding considerably at the expense of the area of the shoot apex. Thus, changes in area of the apex occurring during a plastochron may be intimately correlated with the expansion of the bases of young leaf primordia as well as with that of the apex itself. The growth processes, discussed anatomically in the first paper, are checked quantitatively in the present study.
  • 中原 紘之, 中村 義輝
    1971 年 84 巻 992 号 p. 69-75
    発行日: 1971年
    公開日: 2006/10/31
    ジャーナル フリー
    The life history of Desmarestia tabacoides Okamura has been studied in culture. Unilocular sporangia lie embedded in the superficial layer of the cortex. The zoospores develop into minute filamentous thalli (gametophytes) which are monoecious. The formation of both oogonia and antheridia is induced under the culture conditions of comparatively lower temperature and shorter photoperiod. The fertilized eggs germinate inside the oogonia to form monosiphonous filaments which develop into pseudoparenchymatous Desmarestia plants (sporophytes). The sporophytes grow well at 10-18° in a 10-14-hr photoperiod and bear unilocular sporangia at 14-22° in a 10-14-hr photoperiod.
  • 新井 勇治, 藤崎 三雄
    1971 年 84 巻 992 号 p. 76-78
    発行日: 1971年
    公開日: 2006/10/31
    ジャーナル フリー
    酵素起源を広く高等植物に求め, それらの葉ある いは貯蔵組織から調製した酵素標品について, ADP-glucose pyrophosphorylase, UDP-glucose Pyrophosphorylase および sucrose pynthetase 活性を調査した.
    1) ADP-glucose pyrophosphorylase 活性は, 葉からの酵素標品では, 実験に供した12種類の植物 のすべてにおいて確認されたが, 貯蔵組織の酵素標 品では,11種類の植物のうち4種類の植物について 確認されたにすぎない.
    2) UDP-glucose pyrophosphorylase 活性は, アジサイの葉以外のすべての植物材料において確認 された.
    3)UDP-glucose から sucrose を作るsucrose synthetase 活性は, UDP-glucose pyrophosphorylase と同様にすべての植物で確認されたし
    かし, sucrose 分解反応系による UDP-glucose の 生成は, 貯蔵組織の場合にはすべての植物で確認さ さたが, 葉の場合には4種類の植物でみられたにす ぎなかった. Sucrose から ADP-glucose を作る sucrose sythetase は二, 三の葉についてしか検出 できなかった.
    終りに, 種々のご意見をいただいた東京教育大学 理学部植物学教室西沢一俊教授および中村佐兵衛助 教授に深く感謝いたします.
  • 辰野 誠次, 田中 隆荘, 米沢 義彦
    1971 年 84 巻 992 号 p. 88-93
    発行日: 1971年
    公開日: 2006/10/31
    ジャーナル フリー
    H3-チミジンオートラジオグラフィーによりマル バコマチゴケ Calobryum rotundifolium (Mitt.) Schiffn. (n=9) の雌株において, 中間期核の染色 質異常凝縮および染色体におけるDNA合成につい て研究を行なった.
    1) 本種の異質染色質は真正染色質より遅れて DNA合成を行ない, その時期はS期の中期から後 期である.
    2) 本種の異常凝縮体は凝縮をした状態では DNA合成を行なわない. 異常凝縮体のDNA合成 は, 分散した状態で行なわれ, S期の後半に最も盛ん である.
    3) DNA合成を終えた異質染色質はG2期に入っ て再び凝縮する.
    4) 本種の分裂細胞の中間期核はその大きさ, 異 常凝縮体の形状およびDNA合成の状態により, 次 のように区別された. (1) 分裂期直後の2娘核=G1 期; (2) 小さな部分凝縮核=S期の前期; (3) 大き な部分凝縮核=S期の中期; (4) 分散状核=S期の 後期; (5) 大きな部分凝縮核=G2期.
  • 1971 年 84 巻 992 号 p. 100
    発行日: 1971年
    公開日: 2006/10/31
    ジャーナル フリー
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