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首页> 外文期刊>Journal of Science of the University of Kelaniya Sri Lanka >Genetic Variation and Phytotoxin Production among Cylindrocladium. Quinqueseptatum Isolates of Hevea Brasiliensis and Eugenia Carryophyllata
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Genetic Variation and Phytotoxin Production among Cylindrocladium. Quinqueseptatum Isolates of Hevea Brasiliensis and Eugenia Carryophyllata

机译：柱状杆菌之间的遗传变异和植物毒素的产生。巴西橡胶树和非洲紫锥菊的五倍体分离物

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Cylindrocladium quinqueseptatum (Boedijn & Reitsma 1950) is one of the major plant pathogenic fungi that infects a wide range of plants in humid tropics. The prevailing strains in Sri Lanka cause the foliage and shoot blight diseases and severe defoliation of Hevea brasiliensis (rubber) and Eugenia carryophyllata (clove). The isolates obtained from rubber and clove plants growing in Rathnapura district, in Sabaragamuwa province and Kalutara district, in Western province were evaluated for their toxin activity on hosts and genetic characterization was done using random amplified polymorphic DNA Polymerase Chain Reaction (RAPD-PCR grouping). The analysis of the results using ‘Wilcoxon signed-rank test’ revealed no correlation among the isolates based on their host or geographical origins. But a relationship was observed between the toxin activity and the RAPD grouping of the isolates. The time course experiment reveled that the minimum toxin activity recorded after three days of inoculation and maximum toxin activity was recorded after nine days of inoculation in Modified Fries Medium (MFM) for all the isolates. Based on the toxin activity and genetic characterization data, the isolates were categorized into two groups. The close genetic relationship (similarity index = 0.731) and high toxin activity were shown by one group of isolates obtained from cloves grown in Rathnapura with other two groups of isolates obtained from rubber grown in Kalutara. This observation suggests that C. quinqueseptatum isolated from clove grown in Rathnapura can be a potential pathogen on rubber.DOI: http://dx.doi.org/10.4038/josuk.v7i0.4237J. Sci. Univ. Kelaniya 7 (2012) : 43-54
机译：Cylindrocladium quinqueseptatum（Boedijn和Reitsma，1950年）是一种主要的植物致病真菌之一，可在潮湿的热带地区感染多种植物。斯里兰卡的主要毒株引起叶子和枯萎病，并严重破坏巴西橡胶树（橡胶）和番樱桃叶（丁香）。从生长在萨巴拉加穆瓦省拉特纳普勒地区，西部省卡卢塔拉地区的橡胶和丁香植物中分离得到的分离物评估其对宿主的毒素活性，并使用随机扩增多态性DNA聚合酶链反应（RAPD-PCR分组）进行遗传鉴定。 。使用“ Wilcoxon秩次检验”对结果进行的分析表明，基于宿主或地理来源，这些菌株之间没有相关性。但是观察到毒素活性和分离株的RAPD分组之间的关系。时程实验表明，在所有分离物中，在改良薯条培养基（MFM）中接种三天后记录的最小毒素活性和最大毒素活性是在接种九天后记录的。根据毒素活性和遗传特征数据，将分离株分为两组。一组从Rathnapura种植的丁香中分离出的分离株与从Kalutara种植的橡胶中分离出的其他两组分离株显示出密切的遗传关系（相似指数= 0.731）和高毒素活性。该观察结果表明，从Rathnapura中生长的丁香中分离出的西洋衣原体可能是橡胶上的潜在病原体.DOI：http://dx.doi.org/10.4038/josuk.v7i0.4237J。科学大学Kelaniya 7（2012）：43-54

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