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標題: 應用鏈黴菌Streptomyces spp.防治植物真菌性病害與植物寄生性線蟲病害
Application of Streptomyces spp. for controlling disease caused by plant pathogenic fungi and plant parasitic nematodes
作者: 陳雲成
關鍵字: Streptomyces;鏈黴菌;plant fungal disease;plant parasitic nematode disease;植物真菌性病害;植物寄生性 線蟲病害
出版社: 植物病理學系所
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鏈黴菌Streptomyces saraceticus 31和Streptomyces sp. 205 於對峙培養試驗中,可抑制馬鈴薯晚疫病、蕃茄晚疫病、胡瓜萎凋病與洋香瓜黑點根腐病菌生長。SS31和S205的黃豆砂糖培養液於溫室中,可降低蕃茄晚疫病、胡瓜萎凋病、南方根瘤線蟲和南方根腐線蟲的發生。Streptomyces sp. 233雖不具有抑制病害發生的效果,但其黃豆砂糖培養液中的水解胺基酸和游離胺基酸的含量卻遠高於其他兩株菌。三株鏈黴菌於ISP2、ISP3、ISP4和ISP5培養基上之生長與產孢情形都非常良好,以電子顯微鏡觀察各菌株孢子鏈上之孢子數與孢子表面形態時均大不相同。三株鏈黴菌與四株植物病原性真菌的對峙培養試驗中,SS31對馬鈴薯晚疫病、蕃茄晚疫病、胡瓜萎凋病與洋香瓜黑點根腐病病原菌的平均抑制圈大小分別為13 mm、12.5 mm、35 mm和11 mm;S205之平均抑制圈大小為8 mm、8 mm、10 mm和9 mm;S233則無任何抑制效果。三株鏈黴菌之黃豆砂糖培養濾液對四株植物病原性真菌之拮抗測試中,僅SS31第一天的濾液具有抑制效果,其他兩株菌則沒有。在南方根瘤線蟲孵化率的試驗中,SS31之幾丁質培養液和三株鏈黴菌經黃豆砂糖培養的培養液,可降低線蟲孵化率,同時,三株鏈黴菌經黃豆砂糖、黃豆幾丁質與幾丁質培養後,均能降低根瘤指數,於溫室實驗中,SS31與S205均可降低發病度。根腐線蟲溫室實驗中,三株鏈黴菌之培養液均有抑制效果,其中以SS31之效果最為顯著其發病度 (62.5%) 比對照組 (93.75%) 低。三株鏈黴菌之黃豆砂糖培養液於胡瓜萎凋病溫室防治實驗中,雖無法完全抑制病害發生,卻可將病害延遲至種植後第九週才發病,發病度約為對照組初始發病度的18.5% ~ 49.7%。SS31與S205之黃豆砂糖培養液,於番茄植株感染晚疫病菌後施用於葉面,可降低發病度。本研究結果顯示,SS31與S205菌株之培養液對於受測植物病原性真菌與植物寄生性線蟲均有一定之防治效果,S233雖不具有防治病害之效果,卻有高含量之胺基酸,頗具生物肥料之發展潛力。

Streptomyces saraceticus 31 and Streptomyces sp. 205 inhibited the growth of Phytophthora infestans, pif 65-1, Phytophthora infestans, pift 165-1, Fusarium oxysporium f. sp. cucumerinum, F.o.c. 100 and Monosporascus cannonballusr, MC-1 at dual culture test. SS31 and S205 reduced tomato late blight, fusarium wilt of cucumber, southern root-knot nematode and southern root-lesion nematode in greenhouse tests. Streptomyces sp. 233 could not reduce disease incidence, but produce higher quantity hydrolysed and free amino acid in soybean-sucrose cultural broth than the other two strains. These strains grew and sporulated very well on ISP2, ISP3, ISP4 and ISP5 medium. Scanning electron microscope results showed these strains had their own specific spores number on the spore chain and surface structure on the spores. In dual culture tests, the average inhibition zone of SS31 to pif 65-1, pift 165-1, F.o.c. 100, and MC-1 were 13 mm, 12.5 mm, 35 mm and 11 mm, respectively, S205 inhibition zone to these pathogens were 8 mm, 8 mm, 10 mm and 9 mm; S233 had no inhibitory effect to these pathogens. Only the day one soybean-sucrose broth culture filtrate of SS31 had antagonistic ability to tested fungi. The chitin cultural broth of SS31 and the soybean-sucrose cultural broth of all strains could reduce the hatching rate of southern root-knot nematode. The soybean-sucrose cultural broth of SS31 and S205 reduced the disease incidence and galling index. All cultural broth of three Streptomyces strains had inhibitory effect on southern root-lesion nematode, especially those with SS31. In greenhouse tests, all of three Streptomyces spp. could delay fusarium wilt of cucumber occurrence up to nine weeks, the disease incidence was 18.5% ~ 49.7% of the initial disease severity of control treatment. The soybean-sucrose cultural broth of SS31 and S205 could reduce the disease incidence on tomato late blight by post-treatment. The results of our research showed SS31 and S205 could control plant pathogenic fungi and plant parasitic nematode. Although S233 did not show control efficacy to these tested pathogens, it had the potent to be a biofertilizer for its high quantity of amino acid.
其他識別: U0005-2507200810062600
Appears in Collections:植物病理學系

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