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題 名 | Electron Microscopic Observation of Unripe Banana Fruit Infected with Colletotrichum Musae=蕉炭疽病菌在未成熟香蕉果皮上之電子顯微鏡觀察 |
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作 者 | 張淳文; 呂理燊; | 書刊名 | 植物保護學會會刊 |
卷 期 | 42:3 2000.09[民89.09] |
頁 次 | 頁135-146 |
分類號 | 435.371 |
關鍵詞 | 炭疽病; 附著器; 貫穿絲; 羽狀沈著物; 自然抗菌素; Colletotrichum musae; Ripe rots; Appressoria; Infection peg; Feather-like deposits and phytoalexin; |
語 文 | 英文(English) |
中文摘要 | 香蕉炭疽病菌(Colletotrichum musae)分生孢子接種於未成熟香蕉果皮上八小時之後開始發芽,十六至十八小時之後發生附著器(appressoria),二十四小時之後形成貫穿絲(infecton peg),接種四十五日之後,附著器細胞壁由0.1-0.2μm增至0.3-0.5μm。接種分生孢子於未成熟香蕉果實(開花後五至九十日)之果皮上二十四小時之後,可見羽狀沈著物(feather-like deposits)。為觀察分生孢子於未成熟香蕉果皮上之發芽情形,另外接種分生孢子於開花後三十日之未成熟香蕉果皮上,於接種後八至十二小時,十六至二十四小時,五日至六十日,均於果皮上見到羽狀沈著物。在未接種之未成熟香蕉果皮上,未接種之成熟果皮上,或在已接種之成熟果皮上,均無法見到羽狀沈著物,作者認為當香蕉果實成熟,羽狀沈著物消失,病菌才能侵害香蕉果實之外果皮表皮細胞,該羽狀沈著物可能和香蕉果皮之抗菌機制有關,可能為香蕉植株所產生的自然抗菌素(phytoalexin)。 |
英文摘要 | Electron microscopic observation revealed that on unripe banana fruit Colletotrichum musae germinated after 8 hr, appressoria were formed after 16-18 hr, and infection peg was formed 24 hr after inoculation. The thickness of appressorial wall onunripe banana fruits was 0.1-0.2μm 16-18 hr after inoculation, and 0.3-0.5 μm 45days after inoculation On the 45th day after inoculation, infection peg with collar and cone was observed. After 24 hr inoculation with conidial suspension, feather-like deposits were observed in the epidermal cells of 5, 10, 15, 30, 45, 60, 75, and 90-day-old unripe banana fruits after blooming. In the epidermal cells of 30 day old unripe banana fruits after blooming, these deposits were also observed 8-12 hr, 16-24 hr, 5, 10, 15, 30, 45, or 60days after inoculation. However, those feather-like deposits were not observed in the unioculated unripe; neither in ripe banana fruits, nor in the inoculated ripe banana fruits. We assumed that the fearher-like deposits disintegrated and finally disappeared in the epidermal cells of ripening banana fruits, and the fungus penetrated into epidermal cells. We proposed that feather-like deposits were related to antifungal mechanism, and might be category of phytoalexin produced by banana plant. |
本系統中英文摘要資訊取自各篇刊載內容。