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西瓜疫病とそれを起因する Phytophthora drechsleri TUCKER 菌について
https://kpu.repo.nii.ac.jp/records/5751
https://kpu.repo.nii.ac.jp/records/575182c8161e-77b7-4f92-8045-3220d4af0391
| 名前 / ファイル | ライセンス | アクション |
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KJ00000101080.pdf (2.1 MB)
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| Item type | [ELS]紀要論文 / Departmental Bulletin Paper(1) | |||||||||||||
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| 公開日 | 2017-02-20 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | 西瓜疫病とそれを起因する Phytophthora drechsleri TUCKER 菌について | |||||||||||||
| 言語 | ja | |||||||||||||
| その他（別言語等） | ||||||||||||||
| その他のタイトル | A Phytophthora rot of watermelon caused by Phytophthora drechsleri TUCKER | |||||||||||||
| 言語 | en | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | jpn | |||||||||||||
| 資源タイプ | ||||||||||||||
| 資源タイプ | departmental bulletin paper | |||||||||||||
| 著者 |
桂, 琦一
× 桂, 琦一
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| 抄録(日) | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | 1. 本論文は西瓜疫病とその病原菌に関する研究結果を述べた。本病は本学附属農場で初めて発見したが, その後京都, 奈良, 高知の3府県下に発生していることを認めた。2. 本病は主として7月中下旬に最もはげしく発生するが, 西瓜の成育期間を通じて見られる。雨後特に著しい。3. 発生は水田跡地の滞水或は冠水しやすいところに多く, 畑地ではやや少い。4. 本病は葉, 茎, 果実, 根に発生し, 果実では初め茎1cm位の円形水浸状暗緑色で, やや凹陥した病斑を生ずるが, 急速に拡大し赤褐色水浸状で, 空気が乾燥するときは病斑上に白色粉状の菌叢を生ずる。5. 本病菌は各種培地上で発育良好であるが, 游走子嚢の形成は不良である。しかし菌糸を水中に浸すと間もなく形成する。游走子嚢には乳頭突起を欠き, 又真正の厚膜胞子を形成しない。6. 本病菌は9°-10℃附近から37℃附近まで発育し, 30℃附近が最適発育温度である。7. 本病菌の菌糸は湿熱の場合45℃20分或は50℃5分間で死滅する。8. 本病菌は種子伝染しない。9. 本病菌は西瓜, 胡瓜, 茄子等に接種して游走子嚢を形成せしめ得るが, 有性器官は馬鈴薯, 南瓜, 玉蜀黍の各煎汁寒天培地上で5∿6日後容易に形成し, 又菜豆莢上で2ケ月余で形成した。10. 本病菌は有無傷の接種により西瓜の各器官の他, 胡瓜, 茄子, 菜豆, 梅の各果実及びニンジンの根に対して病原性を示し, 紀州蜜柑, 苹果, 蕃茄の果実には有傷の場合のみ病原性を示したのに対し, 馬鈴薯の塊茎及びダイコンの根に対しては陰性であつた。11. 本病菌はPhytophthora drechsleri TUCKERに該当する。 | |||||||||||||
| 言語 | ja | |||||||||||||
| 抄録(英) | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | 1. The present paper deals with the results of the writer's investigation on the Phytophora causing blight and rot of watermelon. The disease was discovered first in the fields of our university and then in the prefectures of Kyoto, Nara, and Kochi since 1950. 2. The disease generally appears any time after June and continues to appear throughout remaining period of cultivation. From the middle to the end of July the disease seems to be most severe, occuring chiefly after every rain. 3. The disease is very common in field which had been in a paddy condition previously, or are not provided with adequate facilities. 4. The first symptoms of the disease on the fruit are a small circular, sunkun, water-soaked dull green lesion about 1cm. in diameter which rapidly increases in size to form large reddish brown water-soaked area. The lesion is covered with a white, powdery and nonzonate sorus which forms sporangia in abundance in the dry weather. 5. The fungus grows well on agar media of potato, corn-meal, pumpkin, watermelon and kidney bean decoction and the pepton with little or no formation of sporangia. But when mycelial growth on these media were placed in water it forms the sporangia readily. Sporangia have no papilla and true chlamydospores are not observed. 6. The relation of temperature to the growth of the fungus was studied by growing the mycelium on poured plates of potato decoction agar incubated at different temperatures. It was founded that the fungus in culture grows from 9-10℃ to about 37℃, with the optimum temperature of about 30℃. 7. The mycelium grown on potato decoction agar dies when it is placed in a water bath and subject it to a temperatures 45℃ for 20 minutes or 50℃ for 5 minutes. 8. Seed infections of this disease are not observed. 9. The fungus forms sporangia abundantly on the lesion of fruits of watermelon, cucumber and eggplant, and oospores on potato, pumpkin and corn-meal agar media in about five to six days and on boiled kidney bean pod after two months of culture. 10. The causal fungus has a power to infect the injured and unijured fruits, stems, leaves and roots of watermelon as well as the young seedlings of the same plant. Infection occured upon fruits of cucumber, eggplant, kidney bean and plum as well as upon carrot roots by both the injured and uninjured inoculation methods. Fruits of orange (Citrus deliciosa TENORE), apple and tomato were infected only by the injured method. It showed, however, no sign of infection on potato tubers and raddish roots. 11. The causal fungus of the disease is identical with Phytophthora drechsleri TUCKER, which is new to Japan. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
ja : 西京大学学術報告. 農学 en : The scientific reports of the Saikyo University. Agriculture 巻 10, p. 77-85, 発行日 1958-08-01 |
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| 雑誌書誌ID | ||||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||||
| 収録物識別子 | AN00094635 | |||||||||||||
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| 収録物識別子タイプ | PISSN | |||||||||||||
| 収録物識別子 | 03709329 | |||||||||||||
