植物学雑誌
Online ISSN : 2185-3835
Print ISSN : 0006-808X
ISSN-L : 0006-808X
70 巻, 826 号
選択された号の論文の7件中1~7を表示しています
  • スギモクの卵の形成運動
    中沢 信午
    1957 年 70 巻 826 号 p. 81-85
    発行日: 1957年
    公開日: 2006/12/05
    ジャーナル フリー
    The same eggs of Coccophora Langsdorfii were measured at two developmental stages, just after and 24 hours after the fertilization. As a result, it was revealed that their volume was almost constant in spite of their transformation from spherical to ovate, pointed towards the one extremity of the longitudinal axis. This implies the partial decrease of the surface tension on the pointed side. The fertilization cone in the polarity determination is discussed.
    The writer's sincere thanks are due to Dr. Arika Kimura, Tohoku University, for his kind support for the present research.
  • 倉石 晉, 橋本 徹
    1957 年 70 巻 826 号 p. 86-92
    発行日: 1957年
    公開日: 2006/12/05
    ジャーナル フリー
    This study was made to ascertain whether gibberellin influences leaf growth or not, and to study its mode of action on leaf growth. The materials used were Pisum sativum and Raphanus sativus. The effect of gibberellin on growth of intact Pisum plant and excised Pisum internodes has been examined together.
    Gibberellin is effective on leaf disk and excised internodes of Pisum floated on a medium containing gibberellin. But it has no effect on leaf growth of intact Pisum plant.
    The optimum concentration of gibberellin, for the promotion of leaf growth is 10mg./1. and its effect appears on excised leaf within three hours after treatment.
    Remarkable cell enlargement is observed in gibberellin treated leaves without any obvious increase in cell number.
    Gibberellin promotes the leaf expansion rather than the increase of fresh weight in contrast with kinetin which accelerates the increase of fresh weight rather than that of leaf area. In the presence of both compounds, increase on leaf area and fresh weight is larger than when only one of the compounds is used. Therefore, gibberellin and kinetin seem to act in different manners on leaf growth.
    When the intact Pisum was treated with gibberellin at lower stipule, the growth promoting effect of gibberellin moves to the upper internodes and petioles.
    The authors wish to express their deep gratitude to Prof. M. Monsi and Ass. Prof. T. Yamaki of University of Tokyo and Prof. K. Hogetsu of Tokyo Metropolitan University who gave the authors helpful suggestions.
  • 米山 穰
    1957 年 70 巻 826 号 p. 92-96
    発行日: 1957年
    公開日: 2006/12/05
    ジャーナル フリー
  • イネ科の種内及び属間受粉に於ける柱頭反応の存在
    加藤 一男, 渡辺 光太郎
    1957 年 70 巻 826 号 p. 96-101
    発行日: 1957年
    公開日: 2006/12/05
    ジャーナル フリー
    1) The stigma reaction is a change which is taken place in the stigma cells, following the attachment of pollen grains to them. The reaction can be demonstrated with aceto-carmine and other dye solutions, by showing that the stigma cell with a pollen grain is more easily stained than those cells without a pollen grain.
    2) The stigma reaction is widely recognizable among gramineous plants. In the present investigation, 94 cases of pollination, 56 intra-specific and 38 inter-generic pollinations, have been examined. In all these cases the stigma reaction has been ascertained.
    Accordingly, it may be believed that the stigma reaction is a general phenomenon taking place in any pollination in gramineous plants, whether it is intraspecific or inter-generic.
    3) A brief discussion on the possible practical importance of stigma reaction is presented.
    We take this opportunity of thanking Prof. N. Shinke, Botanical Institute, and Prof. S. Imamura, Laboratory of Applied Botany in Kyoto University, for their interest and criticism throughout the investigation.
  • リゾソレニア属についての観察
    奥野 春雄
    1957 年 70 巻 826 号 p. 101-107
    発行日: 1957年
    公開日: 2006/12/05
    ジャーナル フリー
  • 原 襄
    1957 年 70 巻 826 号 p. 108-114
    発行日: 1957年
    公開日: 2006/12/05
    ジャーナル フリー
  • 館岡 亜緒
    1957 年 70 巻 826 号 p. 115-117
    発行日: 1957年
    公開日: 2006/12/05
    ジャーナル フリー
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