植物学雑誌
Online ISSN : 2185-3835
Print ISSN : 0006-808X
ISSN-L : 0006-808X
61 巻, 717-718 号
選択された号の論文の10件中1~10を表示しています
  • 1948 年 61 巻 717-718 号 p. Cover_717-
    発行日: 1948年
    公開日: 2023/10/31
    ジャーナル フリー
  • 古澤 潔夫
    1948 年 61 巻 717-718 号 p. 27-31
    発行日: 1948年
    公開日: 2007/06/18
    ジャーナル フリー
  • 月次會講演要旨
    門司 正三
    1948 年 61 巻 717-718 号 p. 32-
    発行日: 1948年
    公開日: 2023/10/31
    ジャーナル フリー
  • 須藤 俊造
    1948 年 61 巻 717-718 号 p. 33
    発行日: 1948年
    公開日: 2007/06/18
    ジャーナル フリー
    Eggs of Cystophyllum sisymbrioides fertilized with sperms of Sargassum tortile developed in alkaline sea water. Some abnormal cell division and rhizoid formation followed. In normal sea water, no development was noticed.
  • 須藤 俊造
    1948 年 61 巻 717-718 号 p. 34-36
    発行日: 1948年
    公開日: 2007/06/18
    ジャーナル フリー
    1. The fertilization was studied on living materials of the following fucaceous algae: Sargassum enerve, S. tortile, S. Ringgoldianum, S. serratifolium, S. Horneri, Cystophyllum sisymbrioides and Hijikia fusiforme.
    2. The spermatozoids penetrate into the thick mucilaginous coat of the discharged oosphere at the portion characteristic to each species.
    3. The mode of penetration in these species is the same as in Sargassum Horneri (Kunieda and Suto in 1940).
    4. The spermatozoids dissolve the inner oogonial membrane as they pass through it.
    5. The socalled“fertilization cone”is observed only in Sargassum tortile, not in others.
    6. No parthenogenesis was observed.
  • 服部 靜夫, 中原 清士
    1948 年 61 巻 717-718 号 p. 37-38
    発行日: 1948年
    公開日: 2007/06/18
    ジャーナル フリー
    On the trnnks of pine trees, Pinus densiflora and P. Thunbergii, there are found somewhat globular, large wooden protuberances, the formation of which is caused by the infection of a pathogenous fungus Cronartium quercuum Miyabe. During a relatively short winter period, from the middle of January to the beginning of February in Middle Japan, pale yellow, sweet watery drops are exudated from the cracks of the protuberances. This phenomenon was from an old time known and named“pine honey”by natives. The yellow colour is that of minute spermatia of the fungus, which are formed just at the exudation of sugary liquid. We have been studyiug this curious phenomenon, and found that the sweetness of the exadate is caused by two sugars, namely d-fructose and d-glucose, the amount of the former being 3.3 times that of the latter.
    The absolute amount of the sugars has been estimated to be about 3.7%, though it would vary according to the duration the liquid experiences after the exudation, that is to say, to the possible evaporation, which in turn varies according to the activity of the plant. That the saccharose, as is the case with sugar maple, does not occur here, together with the fact that the fructose is the leading sugar, is noteworthy.
  • 田宮 博, 藤茂 宏, 三井 早苗
    1948 年 61 巻 717-718 号 p. 39-44
    発行日: 1948年
    公開日: 2007/06/18
    ジャーナル フリー
    Chlorella ellipsoidea を用ひ, 光合成の暗反應の速度に及ぼす温度の影響をCO2微量及びCO2飽和(pH4.6及び7.0) の條件の下に測定し, その結果を反應速度論的に解析した.
    CO2飽和の場合, 光合成の暗反應は二つの反應段階に解析せられる. 各段階の活性化エネルギーはpHに關せず夫々6及び27kcalであり, 反應速度は前者に於ては水素イオン濃度の増大により減弱されるが, 後者に於てはpH4.6乃至7.0の範圍内ではその影響を蒙らない.
    CO2微量の場合にも, 暗反應は見掛上活性化エネルギー夫々0及び20kcalなる二つの反應段階に解析され得る. しかしCO2飽和の場合に得られた結果との對比により, CO2微量の條件に於ける暗反應は寧ろ三つの反應段階より成るものと看做すのが妥當と考へられる. 三反應段階の内一つは見掛上0kcalなる活性化エネルギーを示し且つその速度はCO2濃度に依存するものであり, 他の二つはCO2飽和の場合に解析によつて求められる反應段階と同一のものと推論せられた.
  • ジャガイモの休眠除去の生長素的考察
    八卷 敏雄
    1948 年 61 巻 717-718 号 p. 45-49
    発行日: 1948年
    公開日: 2007/06/18
    ジャーナル フリー
    1. Freshly-harvested potatoes (Benimaru or Danshyaku) will sprout if seaked in buffer solution (pH 3.5) of IAA or NAA of the physiological concentration, whereas oldly-harvested will not take place sprouting.
    2. Peeling of the potatoes promotes the sprouting of both freshly-and oldly-harvested tubers, and if the peeled potatoes were treated with auxin, the sprouting is much hastened.
    3. In the case of 1 and 2, it weakened the polarity of sprouting and it sprouts more than one bud in each node.
    4. Both in the terminal and the lateral bud of the dormant potato-tubers not so much free auxin was observed as in the naturally sprouted tubers, and in the latter case greater amount of auxin was observed in the terminal bud than the lateral bud.
    5. Auxin was increased both in the terminal and the lateral buds of the peeled or auxin- treated tubers, and this increasement is as large as the sum of the auxin obtained from the peeled and auxin-treated ones, if it is treated with auxin after the peeling.
    6. The auxin of the peeled potato-tubers is neither indoleacetic acid nor traumatic acid, but it has the same effect as indoleacetic acid upon the curvature of Avena coleoptile and sprouting of potato-tubers.
    7. The dormancy of the potato-tubers will be induced the inhibiting effect of the auxin precursor of the potatoes, the sprouting of dormant and on-dormant potatoes will be regulated by the auxin and its precursor, and the sprouting effect of the peeling is only taken place through the production of auxin.
  • 月次會講演要旨
    1948 年 61 巻 717-718 号 p. 50-52
    発行日: 1948年
    公開日: 2023/10/31
    ジャーナル フリー
  • 1948 年 61 巻 717-718 号 p. 54-
    発行日: 1948年
    公開日: 2013/05/20
    ジャーナル フリー
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