植物学雑誌
Online ISSN : 2185-3835
Print ISSN : 0006-808X
ISSN-L : 0006-808X
41 巻, 486 号
選択された号の論文の7件中1~7を表示しています
  • 井狩 二郎
    1927 年 41 巻 486 号 p. 421-432
    発行日: 1927年
    公開日: 2007/06/18
    ジャーナル フリー
    種徴ヲー々列記スルノ煩ヲ避ケテ、本邦産トシテ、分明セル種類ノ檢索表ヲ掲ゲン。
    「バクテリアストルム」屬徴。細胞ハ圓板乃至圓柱状ナリ、蓋面ノ縁邊附近ヨリ、放射的ニ發出スル多數ノ長剌ノ媒介ニヨリテ、眞直ナル細胞連鎖ヲ作ル、鎖列中ノ各細胞ハ、蓋面ヲ以テ相接スル事ナク、其間ニ若干ノ間隙ヲ作ル。鎖列剌ハ普通、僅小ナル基部ヲ殘シテ、隣接セル細胞ノ剌ト一對ヅツ癒合シ、恰モ、一本ノ剌ノ如クナリテ射向ス、之レヨリ剌ハ再ビ叉状ニ分離スルヲ常トス。(或、二三ノ種類ニ於テハ、剌ハ癒合セズ、單ニ、一點ニ於テ交叉ス)。連鎖ノ兩端末ニアル細胞ハ其形、列中ノモノニ比シテ、略々大差ナキモ、其レヨリ發スル端末剌ハ他ト關係ナク、全ク孤立シ、一般ニ良ク發達シテ特異ノ形状ヲナスヲ普通トス。(單ニ冠剌ト云フ)、色素體ハ多數アリ、其形粒状乃至小板状ナリ、靜止核ハ細胞ノ中心ニ位置ス。休眠胞子ハ或種ニ於テ發見セラル。
    本屬ヲ別チテ二節トス。
    A. 冠剌ハ等形ナリ。……Section I. Isomorpha.
    I. 冠剌ハ傘状ニシテ内方ニ向フ。
    a. 冠剌ハ強大ニシテ螺旋紋ヲ有シ、初メ、平面的ニ射向スルモ、個々ハ先端ニ太ク略々直角ニ内曲ス。…………Bacteriastrum varians LAUDER (Fig. 1.)
    b. 冠剌ハ發達スルモ著シク太カラズ、螺旋紋ヲ有ス、側面ヨリ見ル時ハ、饅頭笠状ナリ。
    ×. 鎖列剌ノ叉状部ハ連鎖軸ニ垂直ナル面内ニアリ。…………B. delicatulum CLLVE. (Fig. 4.)
    ××. 鎖列剌ノ叉状部ハ連鎖軸ヲ含ム面内ニアリ。
    a′. 鎖列剌ハ一樣ナリ。……B. hyalinum LAUDER. (Fig. 2.)
    b′. 鎖列剌ハ一樣ナラズシテ諸處ニ特異ノ剌ヲ有ス。……•B. hyalinum LAUDER var. princeps (CASTRACANE) IKARI (Fig. 3.)
    II. 冠剌ハ外方ニ向フ。
    a. 鎖列剌ハ隣接ノ剌ト互ニ接着シテ癒合部ヲ作ル。…………B. biconicum PAVILLARD. (Fig. 9.)
    b. 鎖列剌ハ單ニ一點ニ於テ隣接ノ剌ト交叉スルノミ。
    ×. 冠剌ハ纎細ニシテ外形摺針状ナリ。…………B. minus KARSTEN. (Fig. 6.)
    ××. 冠剌ハ太クシテ螺旋紋ヲ有ス。
    a′. 冠剌ハ外形釣鐘状ナリ。…B. elongatum CLEVE. (Fig. 5, a.)
    b′. 冠剌ハ外形皿状ヲ呈ス。……B. elongatum CLEVE var. diversum IKARI. (Fig. 5, b & c.)
    B. 冠剌ハ扁極性ニシテ一樣ニ一極ニ向フ、鎖軸上ノ位置ニヨリ前冠剌、ト後冠剌トニ區別シ得ベシ。……Section II. Sagittata.
    I. 前冠剌ハ平面的ニシテ鎖軸ニ垂直ナル面内ニ於テ曲ガル、其形、水車状ナリ。……B. elegans PAVILLARD.
    II. 前冠剌ハ一平面内ニアラズ。
    a. 前冠剌ハ底高キ摺鉢状ヲ呈ス、剌ハ凡テ纎細ナリ。…………B. mediterraneum PAVILLARD. (Fig. 7.)
    b. 前冠剌ハ其形半開ノ雨傘状ニシテ各剌ハユルク曲ガル。
    ×. 後冠剌ハ發達セルモ特別ノ小剌列ヲ有セズ。…………B. comosum PAVILLARD. (Fig. 8, a.)
    ××. 後冠剌ハ良ク發達シ、9-18個ヨリナル一列ノ小剌ヲ有ス。…•B. comosum PAVILLARD var. hispida (CASTR.) IKARI (Fig. 8, b.)
    (本表中 Bacteriastrum elegans PARILLARD ノ一種ノミハ邦産トシテ未知ナリ。)
  • 西村 眞琴, 菅野 利助
    1927 年 41 巻 486 号 p. 432-438
    発行日: 1927年
    公開日: 2007/06/18
    ジャーナル フリー
    In Aegagropila Sauteri (Ness) Kütz from the very earliest stage there is no differentiation into a cauloid part and a rhizoid part, and the thallus grows in compact spheres or cushions. The lower parts of the thalli (i. e., the oldest segments of the main axis) gradually die, so that the branches are set free from the base upwards. Usually such free thalli are found floating in great quantities in Akan-Lake in Hokkaido. As usually occurrs in vegetative propagation, each separate portion is able to grow into a complete new thallus.
    In addition to such vegetative propagation, in summer, asexual reproduction was found in the species brought from Akan-Lake. It takes place by biciliated swarm-spores formed in large numbers, and especially very large numbers are formed in the terminal segment.
    Swarm-spores may arise in almost any segment (i. e., apical or median segment) and they escape through an opening which is made by a complete dissolution of the cell-wall at some point near the apex of the segment. In certain cases it was observed that germination of the swarm-spores took place in the segment since there was no opening formed.
    Swarm-spores may occur simultaneously in the same filament. The number of swarm-spores vary, for instance, in the apical segment there usually are many swarm spores, but in the median segment they are sometimes fewer in number. In that case, the spores in the apical segment are smaller than those in the median segment.
    The asexual swarm-spores are pear-shaped and possess two cilia of equal length. The spores are therefore motile and are of an intense green color, and are completely filled with cytoplasm, one nucleus, a visible red eye spot, a few bowl-shaped chloroplasts and food-reserves. The spores are positively phototropic, their apical end being towards the source of light.
    It is evident that the swarm-spores germinate only after a period of rest, and each produces a new filament directly.
  • 同一榮養系ノ個體相互間ニ於ケル授粉ノ效果ニ就テ
    安田 貞雄
    1927 年 41 巻 486 号 p. 438-449
    発行日: 1927年
    公開日: 2007/06/18
    ジャーナル フリー
    Investigations on the fertility in Petunia violacea from the physiolosical point of view has been undertaken by the author.
    In the first paper (Bot. Mag. Tokyo, 1927) the question on the effects of the pollination within the same flower (self-pollination) and that between different flowers on the same individual (neighbour-pollination) were discussed.
    This paper concerned with the effects of the pollination between different individuals of the same vegetative line.
    The same methods of pollination and mearsurments were being employed as in the experiments reported in the first paper with the following results.
    In the first place, when the pistils of one plant were pollinated with the pollen of the different younger individual that was obtained from the cuttings of that plant, it was found that the fertilizing percentage, the size of the unfertilized ovaries and that of the fertilized capusules, and the number, size, weight as well as the germinating percentage of the seeds in addition to the length of the seedlings were all larger than in the cases of the self-and neighbour-pollinations.
    In the second place, when the pollination was done between the scions of the same vegetative line cultivated under the similar condition of either moist, or dry, the effects were better than in the case of the neighbour-, and far better than in the case of the self-pollination. And in the case of the pollination between the scions cultivated under the opposite conditions of either dry or moist, the results were much better than in the case of the pollination done between the scions under the same condition.
    In other words, the more the differences there are in the physiological conditions of the flowers even though they may have the same genetic condition, the more successful were the results obtained from the pollination between them.
  • 1927 年 41 巻 486 号 p. 450-452
    発行日: 1927年
    公開日: 2022/02/17
    ジャーナル フリー
  • 1927 年 41 巻 486 号 p. 452-455
    発行日: 1927年
    公開日: 2013/05/14
    ジャーナル フリー
  • 1927 年 41 巻 486 号 p. 455-457
    発行日: 1927年
    公開日: 2022/02/17
    ジャーナル フリー
  • 1927 年 41 巻 486 号 p. 458-
    発行日: 1927年
    公開日: 2013/05/20
    ジャーナル フリー
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