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First report of fruit and leaf anthracnose caused by Colletotrichum karstii on avocado in Turkey
Crop Protection ( IF 2.8 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.cropro.2020.105145
Aysun Uysal , Şener Kurt

Abstract Avocado (Persea americana Mill.) is one of the most popular deciduous fruit crops grown in tropical and subtropical areas worldwide. Colletotrichum spp., causal agents of anthracnose, are the species commonly associated with fruit and leaf symptoms on avocado in Turkey and all over the world. Since early 2016, necrotic symptoms were detected on avocado trees grown in the Mediterranean Region of Turkey. Fungal isolates obtained from the systematic tissues were examined based on mycelial growth rate, colony colour, conidial shapes and dimensions. Morphological characteristics of the representative isolates AC1 and AC2 of Colletotrichum were similar to those described for C. karstii and the isolates were tentatively identified as Colletotrichum spp. In view of its colonies and conidia features. Morphological data were verified by multilocus phylogenetic analyses of the internal transcribed spacer (ITS) region of the nuclear ribosomal DNA; glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and ACTIN partial genes from two isolates. Pathogenicity tests were conducted by inoculating healthy fruit and leaves with a spore suspension of C. karstii. Unlike the species previously recorded in Turkey, this fungus was first reported as avocado anthracnose pathogen with this study.

中文翻译:

土耳其牛油果炭疽菌引起果叶炭疽的首次报告

摘要 鳄梨(Persea americana Mill.)是全球热带和亚热带地区最受欢迎的落叶果作物之一。炭疽病的病原体是炭疽病菌,是土耳其和世界各地的鳄梨果实和叶子症状通常相关的物种。自 2016 年初以来,在土耳其地中海地区种植的鳄梨树上发现了坏死症状。基于菌丝体生长速率、菌落颜色、分生孢子形状和尺寸检查从系统组织中获得的真菌分离物。炭疽菌的代表性分离株 AC1 和 AC2 的形态特征与对 C. karstii 描述的那些相似,并且这些分离株被初步鉴定为炭疽菌属。鉴于其菌落和分生孢子的特点。通过核糖体 DNA 内部转录间隔区 (ITS) 区域的多位点系统发育分析验证了形态学数据;来自两个分离株的甘油醛 3-磷酸脱氢酶 (GAPDH) 和 ACTIN 部分基因。致病性测试是通过用 C. karstii 的孢子悬浮液接种健康的果实和叶子来进行的。与之前在土耳其记录的物种不同,本研究首次将这种真菌报告为鳄梨炭疽病病原体。
更新日期:2020-07-01
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