日本植物病理学会報
Online ISSN : 1882-0484
Print ISSN : 0031-9473
ISSN-L : 0031-9473
9 巻 , 4 号
選択された号の論文の6件中1~6を表示しています
  • 逸見 武雄, 赤井 重恭
    1939 年 9 巻 4 号 p. 199-210_1
    発行日: 1939年
    公開日: 2009/04/03
    ジャーナル フリー
    1. ベツコウタケは本邦内に廣く分布し,尚生活力旺盛なる濶葉樹の材幹腐朽を基因す。その寄主多種なるも,櫻及びニセアカシヤの被害最も大なるが如し。
    2. べツコウタケは永らく學名をPolyporus semilaccatus BERK.と稱せられたれども,最近今關(7)はPolyporus rhodophaeus LÉVを之に當て,前者をその異名と見做せり。若しTROTTER (17),今關等のなせる如く,兩菌を同一種と見做し得るならば,先命權に基き本菌學名には後者を採用す可きものなり。
    3. 本論文に於ては最初筆者等の調査せる本菌の形態を記載し,次でその分布を檢討したるが,本邦内地に於ては本州各地,四國竝に九州に産するのみならず,その分布は北海道より臺灣竝に朝鮮に及び,海外に於ては比律賓,瓜哇, Porto Rico, North Borneo, Ceylon及び印度等に知らるるが如し。
    4. 本菌の菌絲は大體11℃前後より40℃前後迄發育し得るも,特に16℃と36℃との間に於て良好,發育に對する最適温度は31°-32℃に存するものの如し。
    5. ニセアカシヤ樹幹の腐朽状態を研究したるが,通常子實體が根際部に發育する點竝に該部が腐朽の最も進みし點より考察するに,本菌は斯の如き場所の傷痍より侵入し,幹及び根の材質部腐朽を基因するものと見做し得。
    6.材質腐朽は通常周圍の邊材部に發し,次第に心材の中心に向つて進行するも,純然たるperipheral rotにあらざるが如し。時にはmixed rotを基因するものの如く,幹の横斷面に於て周邊部及び中心部に最も腐朽の進展せし部分ありて,中間に尚健全なる組織殘存するを認めたり。
    7.腐朽材は全體一樣に白變するものにして,材は稍々柔軟となり,遂には脆くして輕きものに變ず。
    8.腐朽材の觀察によるも, BAVENDAMM氏反應によるも,本菌はリグニン溶解菌Korrosionspilzeに屬すること明かなり。
  • 服部 定一, 田村 隆
    1939 年 9 巻 4 号 p. 211-222
    発行日: 1939年
    公開日: 2009/04/03
    ジャーナル フリー
    With Poria vaporaria (PERS.) FR., Polystictus sanguineus (L.) FR., and Schizophyllum commune FR. as test fungi, experiments were carried out for determining the checking effect of electricity upon the growth of wood-destroying fungi. Electric current (direct, alternating, and high-frequency) was run
    (1) through a piece of wood placed upon a fungous mat which has been reared on culture medium,
    (2) through the fungi inoculated upon culture medium,
    (3) through the fungi cultivated upon a piece of wood.
    The results were as follows:
    (1) electric current had a checking effect upon the growth of fungi,
    (2) the fungi were destroyed at a spot where density of current was great,
    (3) direct current had a greater effect than alternating current,
    (4) high-frequency current could not be expected to have a very great effect.
    As the causes of such a checking effect of current may be mentioned (i) heat, (ii) production of toxic substances due to electrolysis, (iii) movement of charged substances and migration of nutritive elements due to electro-endosmose, and (iv) destructive action. The results of test have shown, however, that (i) and (ii) are not so effective as to check the growth of the fungi. From the fact that the colouring matter was segregated out of the cells of Polystictus sanguineus (L.) FR., it seems that the electro-endosmose greatly affects the growth of the fungi.
  • 赤井 重恭
    1939 年 9 巻 4 号 p. 223-235
    発行日: 1939年
    公開日: 2009/04/03
    ジャーナル フリー
    In Japan the method of cultivation of the rice plant is quite different from that of other cereals and the proper preparation of the land for the seedlings later to be transplanted, is most important in order to obtain strong and healthy plants. For this purpose the nursery-beds with or without covering water are most commonly used. Among the grown rice plants transplanted from these nursery-beds in their seedling stage, there seems to exist a difference of susceptibility to the blast disease. It is clear that the plants originated from humid soil are more resistant than those from arid soil. In the present paper, the writer has discussed the results of comparison of the ash figures in leaves of rice plants transplanted from these two nursery-beds. The number of silicated epidermal cells per unit area of leaf, especially of the bulliform cells, is larger in plants transplanted from the former than in those transplanted from the latter. It seems to be very interesting that the number of silicated cells in the bulliform cells, which are more easily penetrated by the causal fungus (Piricularia Oryzae B. et C.) than the long and short cells, varies in accordance with such different conditions in the seedling stage.
  • 富樫 浩吾
    1939 年 9 巻 4 号 p. 236-242
    発行日: 1939年
    公開日: 2009/04/03
    ジャーナル フリー
  • 河村 貞之助
    1939 年 9 巻 4 号 p. 243-262
    発行日: 1939年
    公開日: 2009/04/03
    ジャーナル フリー
  • 後藤 和夫
    1939 年 9 巻 4 号 p. 263-265
    発行日: 1939年
    公開日: 2009/04/03
    ジャーナル フリー
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