Fungal pathogens of American ginseng (Panax quinquefolium) in British Columbia
Fungal pathogens of American ginseng (Panax quinquefolium) in British Columbia
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DOI：
10.1080/07060669709500528
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发表时间：
1997-09-01
期刊：
影响因子：
--
通讯作者：
Punja, ZK
中科院分区：
文献类型：
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作者：
Punja, ZK
鉴定了不列颠哥伦比亚省西洋参的主要真菌病原。从1992-1996年在Okanagan-Kootenay和Alppson-Cariboo地区人参种植园采集的根（235个样品）和叶（25个样品）中分离。从1 ~ 2年生幼苗和腐烂的成熟根系中分离到的真菌主要为终极腐霉（Pythium ultimum）（35.6%）、镰刀菌（Fusarium）（30.5%）（主要为镰刀菌F. solani，F.尖孢F. avenaceum和F.木贼（equiseti）、立枯丝核菌（Rhizoctonia solani AG 4）（19.6%的频率）和腐殖酸腐殖酸菌（Aciddrocarpon destructans）（9.8%的频率）。从病叶和叶柄组织中分离到的病原真菌有恶疫霉、人参链格孢、灰链格孢、灰链格孢等。alternata和灰葡萄孢（Botrytis cinerea）。在离体条件下，P. ultimum和F. solani对幼苗根系的致病性最强，其次是R. solani和P. cactorum。在离体叶片上，致病性最强的真菌是恶疫霉、B. cinerea和A. alternata，其次为A. panax和R.索拉尼本研究的结果显示了不列颠哥伦比亚省人参常见真菌的发病率、分布、种类和致病性。
Major fungal pathogens of American ginseng (Panax quinquefolium) in British Columbia were identified. Isolations were made from roots (235 samples) and leaves (25 samples) collected from ginseng-growing gardens in the Okanagan-Kootenay and Thompson-Cariboo regions during 1992-1996. The fungi recovered from damped-off 1- to 2-year old seedlings and from decayed mature roots were Pythium ultimum (35.6% of total isolates), species of Fusarium (30.5% frequency) (primarily F. solani, F. oxysporum, F. avenaceum, and F. equiseti), Rhizoctonia solani AG 4 (19.6% frequency), and Cylindrocarpon destructans (9.8% frequency). The fungi recovered from diseased leaf and petiole tissues were Phytophthora cactorum, Alternaria panax, A. alternata, and Botrytis cinerea. When tested in vitro, P. ultimum and F. solani were the most pathogenic to seedling roots, followed by R. solani and P. cactorum. On detached leaves, the most pathogenic fungi were P. cactorum, B. cinerea, and A. alternata, followed by A. panax and R. solani. The results of this study show the incidence, distribution, species identity, and pathogenicity of some of the commonly encountered fungi causing diseases of ginseng in British Columbia.