| 摘要: |
| 研究以无瓣海桑 Sonneratia apetala 叶部病组织上分离的菌株 WBHS-YB-2A 为试材，依据柯赫氏法则测定了其致病性，同时开展了该菌的形态学和生物学特性研究。结果表明：菌株 WBHS-YB-2A 为无瓣海桑叶斑病的病原菌，该病原菌隶属于拟盘多毛孢属；该菌能利用多种碳源和氮源，其最佳碳源为葡萄糖，最佳氮源为蛋白胨，最适培养温度为 25 ℃，最适 pH 为 6.0；在缺氮、缺碳条件下，菌丝生长缓慢、气生菌丝稀疏，生长势较差。研究明确了无瓣海桑叶斑病为无瓣海桑的一种新病害，其病原菌为拟盘多毛孢属一新种 Pestalotiopsis sonneratiae。研究结果丰富了无瓣海桑的病害目录。 |
| 关键词: Pestalotiopsis sonneratiae 无瓣海桑叶斑病 生物学特性 |
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| 基金项目:广东省重点领域研发计划项目（2020B020214001），广东省基础与应用基础研究基金项目（2019A1515110596） |
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| Study on Identification and Biological Characteristics of Leaf Spot of Sonneratia apetala |
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huang hua1, fengjinyan2, lujiankang3, zhangliangjun2, liuxinger2, tianlongyan2
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1.Forest pest control and Quarantine Station of Fengkai Forestry Bureau;2.Guang Dong Academy of Forestry;3.Guangdong Academy of Forestry
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| Abstract: |
| Fn this study, we isolated a fungal strain (WBHS-YB-2A) from the leaf spot of Sonneratia apetala. We determined its pathogenicity according to Koch’s rule, and studied its morphological and biological characteristics. The results showed that WBHS-YB-2A were pathogenic fungus of leaf spot disease of S. apetala, which was belonging to the genus of Pestalotiopsis. It used a variety of carbon and nitrogen sources, which optimum carbon and nitrogen sources were glucose and peptone. Under the condition of nitrogen and carbon deficiency, its mycelia grew slowly and sparsely. The optimal temperature and pH for cultivation was 25℃ and 6.0, respectively. This research clarified that the leaf spot of S. apetala was a new pathogen, which enriched the disease catalogue. It would provide a basis for the prevention and control the disease of mangrove forests. |
| Key words: Pestalotiopsis sonneratiae leaf spot of Sonneratia apetala biological characteristics |
