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首页> 外文期刊>Australasian Plant Pathology >Infection, hyperparasitism and conidiogenesis of Mycosphaerella lateralis on Eucalyptus globulus in Western Australia
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Infection, hyperparasitism and conidiogenesis of Mycosphaerella lateralis on Eucalyptus globulus in Western Australia

机译：西澳大利亚州桉树上的侧枝球菌的感染，超寄生和分生

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摘要

Mycosphaerella lateralis has been isolated from diseased eucalypt foliage in conjunction with the known pathogens M. cryptica and M. nubilosa. This study sought to determine whether Dissoconium dekkeri, the anamorph state of M. lateralis, infects healthy eucalypt leaves or is a hyperparasite of M. cryptica or M. nubilosa. Detached Eucalyptus globulus leaves were inoculated with conidial suspensions of M. lateralis and the progress of leaf infection studied over 6 days. Clearing and staining of the leaves showed that infection occurred via stomata after 3 days. In order to determine whether M. lateralis is a hyperparasite of M. cryptica or M. nubilosa, colonies of these species were grown adjacent to one another on either water agar, 0.2% malt-extract agar (MEA) or 2% MEA. No evidence of M. lateralis parasitising M. cryptica or M. nubilosa was found. This indicates that M. lateralis may be a foliar pathogen, rather than a hyperparasite as was previously suggested. Scanning electron microscopy was used to show that conidiogenesis of M. lateralis is both percurrent and sympodial.
机译：已经从患病的桉树叶中与已知的病原体M. cryptica和M. nubilosa分离到了侧枝霉菌。这项研究试图确定Dissoconium dekkeri（侧枝支原体的无性状态）是否感染健康的桉树叶片，或者是隐孢子原体或nubilosa的超寄生虫。分离的桉树球叶接种了外侧分枝杆菌的分生孢子悬浮液，并在6天内研究了叶感染的进程。叶子的清除和染色表明3天后通过气孔发生了感染。为了确定外侧分枝杆菌是隐孢子虫或串虫分枝杆菌的超寄生虫，将这些物种的菌落在水琼脂，0.2％麦芽提取琼脂（MEA）或2％MEA上彼此相邻生长。未发现侧枝支原体寄生于隐孢子虫或白喉支原体的证据。这表明外侧分枝杆菌可能是叶的病原体，而不是先前提出的超寄生虫。扫描电子显微镜被用来显示侧枝支原体的分生是过流的和共生的。

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