巻号一覧
70 巻 (2004)
- 4 号 p. 307-
- 3 号 p. 145-
- 2 号 p. 99-
- 1 号 p. 1-
70 巻, 4 号
選択された号の論文の4件中1～4を表示しています
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小金澤 碩城, 高山 智光, 笹谷 孝英2004 年 70 巻 4 号 p. 307-313
発行日: 2004/11/25
公開日: 2009/02/19
ジャーナル フリーキャベツ畑土壌からOlpidium brassicaeのアブラナ科系統を分離した.これらの最初の分離集団は休眠胞子を形成したが,単遊走子のう分離株は休眠胞子を形成しなかった.単遊走子のう分離株を交配することにより休眠胞子が形成され,性の分化が認められた.わが国でO. brassicaeのアブラナ科系統が分離されたのは初めてである.一方,ネギ,タバコ,レタス,ダイズ圃場の土壌から分離された非アブラナ科系統の5単遊走子のう分離株は交配することなしに休眠胞子を形成した.また,宿主や感染部位により休眠胞子の形成割合が異なっていた.これらの事実と既往の報告を照らし会わせると, Sahtiyanci (1962)が主張しているようにO. brassicaeのアブラナ科系統と非アブラナ科系統は別種とするのが妥当と考えられた.抄録全体を表示PDF形式でダウンロード (2457K) -
矢野 和孝, 石井 英夫, 深谷 雅子, 川田 洋一, 佐藤 豊三2004 年 70 巻 4 号 p. 314-319
発行日: 2004/11/25
公開日: 2009/02/19
ジャーナル フリーBenzimidazole-resistant strains isolated from anthracnose-affected leaves of Japanese pear were not negatively correlated with cross-resistance to diethofencarb. Based on this, the strains were thought to perhaps be Colletotrichum acutatum, which is inherently insensitive to both benzimidazoles and diethofencarb. However, morphological studies and polymerase chain reaction using primers that specifically amplified the internal transcribed spacer 1 region of ribosomal DNA of C. gloeosporioides and C. acutatum, showed that the strains were intermediately benzimidazole-resistant of C. gloeosporioides. EC50 of benomyl for mycelial growth of the strains was around 15 ppm, an intermediate value between that for sensitive strains and highly resistant strains. The deduced amino acid at codon 200 was altered from phenylalanine (TTC) to tyrosine (TAC), based on sequence analysis for the β-tubulin gene. Control efficacy of benomyl against intermediately benzimidazole-resistant strains was low in inoculation tests.抄録全体を表示PDF形式でダウンロード (428K) -
前川 和正, 笹谷 孝英, 藤井 寛也, 石川 浩一, 神頭 武嗣, 岩本 豊, 相野 公孝2004 年 70 巻 4 号 p. 320-322
発行日: 2004/11/25
公開日: 2009/02/19
ジャーナル フリーFrom lettuce (Lactuca sativa) leaves with big-vein symptoms, two viruses associated with lettuce big-vein, Mirafiori lettuce virus (MiLV) and Lettuce big-vein virus (LBVV), were isolated. To make clear which virus is really associated with big-vein symptoms expression, the effect of the growth temperature for lettuce, on the serological detection of the two viruses and symptom expression was analyzed. At 27°C, LBVV was detected in the leaves, but neither the big-vein symptoms nor MiLV were observed. When the growth temperature was decreased to 18°C, big-vein symptoms appeared and MiLV was detected in the leaves.抄録全体を表示PDF形式でダウンロード (232K) -
竹内 妙子, 久保 周子, 青木 孝之2004 年 70 巻 4 号 p. 323-325
発行日: 2004/11/25
公開日: 2009/02/19
ジャーナル フリーLeaf sheath rot of rakkyo plants (Allium chinense G. Don) has been observed in Chiba Prefecture since 1990. Lerf blades became reddish and underground parts of leaf sheaths rotted. A Fusarium species was isolated from the diseased leaf sheaths and typical symptoms observed in nature were reproduced by inoculation. The casual agent was identified as Fusarium avenaceum (Fries) Saccardo.抄録全体を表示PDF形式でダウンロード (680K)
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