| 摘要: | 白粉菌會感染觀賞型植物或是小麥這類經濟作物甚至是路邊的野草，因此他與我們生活息息相關，感染部位是植物的葉片莖花果實，明顯的症狀是在葉片產生白色的斑點，使植物扭曲萎縮，並且他們會用附著器和吸器等特殊構造來吸取植物養分。由於台灣位處於熱帶跟亞熱帶氣候之間，適合白粉菌生長，主要以無性世代繁殖，上一次關於白粉菌的分類紀錄是1998年，不過近年來有其他外來種的引進這可能會有更多關於宿主與寄生者之間的新紀錄，我們一般會用ITS DNA序列做分子鑑定能更明確的鑑定物種，不過我們也希望能用蛋白質基因的方式做更詳細的鑑定。目前更採集了20種樣本，四個Podosphaera xanthii新宿主的紀錄，兩個Golovinomyces屬的新宿主紀錄(Coccinia grandis as new host of Golovinomyces orontii, Bothriospermum zeylanicum as new host of Golovinomyces cynoglossi) 和一個Erysiphe屬的新宿主紀錄 (Melilotus indicus as new host of Erysiphe trifolii)，另外我們使用了蛋白質基因(Beta-tubulin, RPB2, Histone 3, TEF1-α)嘗試在鑑定上能做出更精確的分類。;Powdery mildews infects ornamental plants, cash crops like wheat or even roadside weeds, so it is very relevant to our lives, and the infection is in the leaves of the plant, the stem flower fruit, and the obvious symptom is that it produces white spots on the leaves. Twist and shrink plants. And powdery mildews have special structures such as appressoria and haustoria to absorb plant nutrients. Because Taiwan is located between the tropical and subtropical climates, it is suitable for powdery mildew to grow and predominance of the asexual generation. The last checklist record of powdery mildew was on 1998. But in recent years, other exotic species have been introduced, which may lead to more new records of host and parasite. We usually use ITS DNA sequences to identify species more clearly, but we also want to use protein genes to identify species more precisely. In this study, twenty samples were collected, four new hosts of Podosphaera xanthii, two new hosts of Golovinomyces genus (Coccinia grandis as new host of Golovinomyces orontii), (Bothriospermum zeylanicum as new host of Golovinomyces cynoglossi) and a new host record of Erysiphe genus (Melilotus indicus as new host of Erysiphe trifolii). In addition, we used the protein genes (Beta-tubulin, RPB2, Histone 3, TEF1-α) to try to make more accurate classification in identification. |
