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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Alternaria alternata ： ウィキペディア英語版 Alternaria alternata ''Alternaria alternata'' is a fungus which has been recorded causing leaf spot and other diseases on over 380 host species of plant. It is an opportunistic pathogen on numerous hosts causing leaf spots, rots and blights on many plant parts. It can also cause upper respiratory tract infections and asthma in humans with compromised immunity. ==Disease cycle== There is no known teleomorph for Alternaria alternata. As a result, this pathogen propagates itself via asexual spores called conidia.〔Timmer, Lavern. M., Tobin L. Peever, Zvi Solel, and Kazuya Akimitsu. "Alternaria Diseases of Citrus - Novel Pathosystems." Phytopathology Mediterranea 42 (2003): 99-112. Citrus Research and Education Center. Web. 21 Oct. 2015.〕 These conidia are produced in lesions on mature or dying leaves.〔 Their production can begin in as few as ten days after the first symptoms appear, and can continue for to up to fifty days.〔Dewdney, M. M. "Alternaria Brown Spot1." EDIS New Publications RSS. Web. 22 Oct. 2015.()〕 A. alternata’s conidia disperse via air currents, and their release from the lesions can be triggered by rainfall, or even just a sudden drop in humidity.〔 When the conidium lands on a leaf, it will wait until the nighttime dew, and then germinate.〔 It can either enter through the stomata, or penetrate directly through the top of the leaf, using its appressorium, infecting the leaf within 12 hours.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Alternaria alternata」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.