翻訳と辞書 Words near each other ・ Armillaria hinnulea ・ Armillaria jezoensis ・ Armillaria limonea ・ Armillaria luteobubalina ・ Armillaria mellea ・ Armillaria melleorubens ・ Armillaria montagnei ・ Armillaria nabsnona ・ Armillaria novae-zelandiae ・ Armillaria omnituens ・ Armillaria pallidula ・ Armillaria paulensis ・ Armillaria pelliculata ・ Armillaria procera ・ Armillaria puiggarii ・ Armillaria root rot ・ Armillaria sinapina ・ Armillaria singula ・ Armillaria socialis ・ Armillaria solidipes ・ Armillaria sparrei ・ Armillaria tabescens ・ Armillaria tigrensis ・ Armillaria umbrinobrunnea ・ Armillaria viridiflava ・ Armillaria yungensis ・ Armillary sphere ・ Armillifer ・ Armillifer armillatus ・ Armillifer grandis Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Armillaria root rot ： ウィキペディア英語版 Armillaria root rot Armillaria root rot is a fungal root rot caused by several different members of the genus ''Armillaria''. The symptoms are variable depending on the host infected, ranging from stunted leaves to chlorotic needles and dieback of twigs and branches. However, all infected hosts display symptoms characteristic of being infected by a white rotting fungus. The most effective ways of management focus on limiting the spread of the fungus, planting resistant species, and removing infected material. This disease poses a threat to the lumber industry as well as affecting recreational areas. == Hosts and symptoms == Because this disease is caused by multiple species within the genus ''Armillaria'', it has an extremely broad host range. Hundreds of trees and shrubs are susceptible to root rot to varying degrees. In fact, the only two genera of tree known to be resistant to Armillaria root rot are larch and birch. Further investigation is being conducted for additional species, but at this time there is no further evidence leading to the belief that more exist. As a result of the multitude of possible hosts, symptoms also range a great deal from one infection to another. All infected hosts do however display symptoms common to white rotting fungi. These include light or bleached wood as a result of the degradation of essential cell wall compounds such as lignin and hemicellulose. In addition to these, the host will show above-ground symptoms due to fungal infection of the vasculature. These include chlorosis in the needles as well as dieback of twigs and branches. The extent of these symptoms varies with the degree of infection as well as the susceptibility of the host. In addition to these symptoms, the trunks of conifers will also exude excess resin in a process known as resinopsis which results in a layer of resin, debris, and fungal tissue forming around infected roots.〔 Deciduous trees occasionally develop sunken cankers but most often fail to exhibit these symptoms on the trunk, and will instead simply display the other symptoms. In addition to these symptoms, signs of the infectious organism are very evident in the host. Upon removal of the bark, white mycelial mats are visible along with rhizomorphs, a distinctive reproductive structure. Clusters of mushrooms will also form at the base of the infected tree, indicating an infection. Also, zone lines of melanized fungal cells may be visible within infected wood. 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「Armillaria root rot」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.