Identification and characterization of non-pathogenic Fusarium oxysporum capable of increasing and decreasing Fusarium wilt severity
Identification and characterization of non-pathogenic Fusarium oxysporum capable of increasing and decreasing Fusarium wilt severity
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DOI：
10.1016/j.mycres.2006.03.008
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发表时间：
2006-08-01
影响因子：
--
通讯作者：
Aitken, Elizabeth A. B.
中科院分区：
文献类型：
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作者：
Forsyth, Leanne M.;Smith, Linda J.;Aitken, Elizabeth A. B.
香蕉枯萎病是一种危害性很大的病害。控制病原体香蕉尖镰孢专化型（Fusarium oxysporum f.sp. cubense）的选择有限。抑制土壤网站以前已经确定，尽管存在的Foc，枯萎病不发展。为了了解这种疾病抑制的一些方面，从香蕉根获得内生尖孢镰刀菌分离物。这些菌株的遗传特征，并与之前确定为能够抑制香蕉枯萎病在温室试验中的分离的尖孢镰刀菌。选择另外三个分离物用于温室试验，以评估香蕉的两个不同品种卡文迪什（Cavendish）和淑女指（Lady Finger）中枯萎病的抑制。一个分离物（BRIP 29089）被确定为一个潜在的生防微生物，降低枯萎病的严重程度，在夫人手指和卡文迪什品种。有趣的是，一个分离物（BRIP 45952）增加了卡文迪什上的枯萎病严重程度。一个分离的尖孢镰刀菌，香蕉上的非致病性，增加疾病的严重程度和潜在的作用，尖孢镰刀菌的非致病性菌株在疾病复合体的影响进行了讨论。(c)2006年由Elsevier Ltd代表英国真菌学会出版。
Fusarium wilt of banana is a potentially devastating disease throughout the world. Options for control of the causal organism, Fusarium oxysporum f.sp. cubense (Foc) are limited. Suppressive soil sites have previously been identified where, despite the presence of Foc, Fusarium wilt does not develop. In order to understand some aspects of this disease suppression, endophytic Fusarium oxysporum isolates were obtained from banana roots. These isolates were genetically characterized and compared with an isolate of Fusarium oxysporum previously identified as being capable of suppressing Fusarium wilt of banana in glasshouse trials. Three additional isolates were selected for glasshouse trials to assess suppression of Fusarium wilt in two different cultivars of banana, Cavendish and Lady Finger. One isolate (BRIP 29089) was identified as a potential biocontrol organism, reducing the disease severity of Fusarium wilt in Lady Finger and Cavendish cultivars. Interestingly, one isolate (BRIP 45952) increased Fusarium wilt disease severity on Cavendish. The implications of an isolate of Fusarium oxysporum, non-pathogenic on banana, increasing disease severity and the potential role of non-pathogenic isolates of Fusarium oxysporum in disease complexes are discussed. (c) 2006 Published by Elsevier Ltd on behalf of The British Mycological Society.