植物学雑誌
Online ISSN : 2185-3835
Print ISSN : 0006-808X
ISSN-L : 0006-808X
41 巻 , 489 号
選択された号の論文の5件中1~5を表示しています
  • Yasu Homma
    1927 年 41 巻 489 号 p. 541-546
    発行日: 1927年
    公開日: 2007/06/18
    ジャーナル フリー
    本病害ハ大正四年五月札幌ニ於テ梅樹ノ苗木ニ認メラレタルヨリ以後年々梅樹ニ發生シ、時ニ大害ヲナシツ、アル所ノモノナリ。尚大正十二年五月ニ至リ北海道帝國大學農學部所屬果樹園ニ於ケル桃樹ニモ發生シ、大害ヲナセルモノニシテ、極メテ注意スベキ病害ノ一ナリトス。
    二年生ノ枝ニ於テハ葉痕部ヲ圍繞シテ長橢圓形灰白色ノ病斑ヲ生ジ、其部内ニ同心圓状又ハ不規則ニ散在セル小黒點隆起シ來リ、該被害部ヨリ上部ハ枯死スルヲ常トス。成木ニ於テハ樹幹ノ分岐部ニ多ク發病シ、表皮黒褐色ニ變ジ幾分凹陥シ、樹脂ヲ分泌スルコト多シ。後皮部ヲ破リ病原菌ノ子殼ハ小皮目ノ如キ觀ヲ呈シテ外出ス。此ノ場合ニ於テモ病勢進ムトキハ上部枯死スルヲ以テ、若シ本幹ノ基部ニ發病セバ全樹枯死スルニ至ル。
    本病々原菌ハ Camarosporium Persicae MAUBL. ニシテ一九〇七年桃樹ニ寄生スルモノトシテ MAUBLANC 氏ノ記載セルモノニシテ未ダ梅樹ニ寄生スルヲ報ゼルモノナシ。子殼ノ孔ロヨリ湧出スル胞子ヲ取リテ種々ナル培養基上ニ培養スルニ其發育一般ニ不良ニシテ殊ニ子殼生成ノ遲々タルモノナルヲ認メタリ。
    本菌ノ胞子ヲ取リテ接種試驗ヲナシタル結果ヨリ見ルトキハ、決シテ健全ナル樹皮ヲ貫キテ侵入スルコトナク必ズ損傷ノ存スルヲ必要ナルモノニシテ、其接種ハ晩秋ニ於テ行ハルヽモノナルヲ知ル。從ツテ本病豫防ノ方法トシテハ損傷部ヲ生ゼシメザルヲ必要トシ、治療ノ目的ニハ被害部ヲ去リ其傷ロニ千倍昇汞水ヲ塗布スルヲ可トス。
  • Benso Kanna
    1927 年 41 巻 489 号 p. 547-551
    発行日: 1927年
    公開日: 2007/06/18
    ジャーナル フリー
    1. Albino seedlings were segregated in the hybrid progeny of some crosses. The albinism is manifested by a recessive factor.
    2. Two cases of spontaneous segregation of deficient seedlings were observed. Their occurrences are attributed to mutations happening independently, but in the same direction. The deficient condition is transmitted as a simple recessive to the normal.
  • Tadao Jimbo
    1927 年 41 巻 489 号 p. 551-553
    発行日: 1927年
    公開日: 2007/06/18
    ジャーナル フリー
  • 安田 貞雄, 新井 徳次
    1927 年 41 巻 489 号 p. 553-559
    発行日: 1927年
    公開日: 2007/06/18
    ジャーナル フリー
    In the two of Yasuda′s previous papers of this series (Bot. Mag. Tokyo, 1927), it was reported that the greater the difference in the physiological conditions of the flowers there was, the more successful was the result obtained from the pollination between them, even though they were of the same genetic condition.
    To make the cause of this phenomenon clear, an investigation was made on the characters of the secretions of the pistils. The results of such experiments pertaining to the fertility and germinating power of the pollens, both of which are influenced by either the secretion from the stigma of the same flower or that from the stigma of the different individual are reported in this paper.
    When the stigma which had been washed with water and smeared with the secretion from the stigma of a different individual was pollinated with the pollen taken from the same flower as that of the pistil, the fertilizing percentage, the size of either unfertilized overies or of fertilized capsules, the number, size, weight, as well as the germinating percentage of the seeds, the length of the seedlings etc. were found to be larger than those observed when the ordinary intra-self pollination had been made.
    The germinating percentage of the pollens was tested with two kinds of artificial media, each of which contained an optimum amount of sugar and PH value for their germination, but to the one the secretion from the stigma of the same flower was added and to the other that from the stigma of a different individual was mixed. The results showed clearly that the secretion from a different individual was beneficial to the germination of the pollen than that from the stigma of the same flower.
  • 1927 年 41 巻 489 号 p. 568-573
    発行日: 1927年
    公開日: 2013/05/14
    ジャーナル フリー
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