Serological and Molecular Characterization of Cucurbit chlorotic yellows virus Affecting Cucumber Plants in Egypt

M. Amer
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引用次数: 16

Abstract

This study was aimed to identify the causal agent inducing virus-like symptoms on cucumber plants for the first report of Cucurbit chlorotic yellows virus (CCYV) in Egypt. A total of 45 symptomatic and asymptomatic cucumber samples were collected from five locations in El-Behira, government, Egypt during June, 2014. Out of 45 samples analyzed by DAS-ELISA, twenty two samples were found infected by CCYV only, two and four samples showed mixed infection with Cucurbit yellow stunting disorder virus+CCYV and Cucurbit aphid-borne yellows virus+CCYV, respectively, whereas the rest of the samples were negative to all three viruses. No RT-PCR products were obtained with all tested samples when the specific primer for Beet pseudo-yellows virus was used. Total RNA was extracted from ELISA positive samples for CCYV and a 353-bp DNA fragment of the HSP70 gene was amplified by RT-PCR using specific primer for CCYV. The synthesized cDNA probe for CCYV was used to confirm the detection of CCYV in singly and mixed infections using dot blot hybridization. The highest similarity (100%) was found with 22 isolates of CCYV isolated from melon, watermelon, cucumber and muskmelon in Japan, China, Taiwan, Lebanon and Sudan was found but the lowest similarity (94.3%) was found with two isolates from cucumber and melon in Iran. To our knowledge, this is the first report of CCYV on cucumber in Egypt.
影响埃及黄瓜植株的瓜绿黄病毒的血清学和分子特性
本研究旨在为埃及首次报道的葫芦绿黄病毒(Cucurbit chlorotic yellow virus, CCYV)在黄瓜植株上引起病毒样症状的病原鉴定。2014年6月,在埃及政府El-Behira的5个地点共采集了45份有症状和无症状黄瓜样本。45份样品经DAS-ELISA分析,22份样品仅感染CCYV, 2份和4份样品分别混合感染葫芦黄色发育障碍病毒+CCYV和葫芦蚜虫传播的黄色病毒+CCYV,其余样品均阴性。使用甜菜伪黄病毒特异性引物,所有检测样品均无RT-PCR产物。从ELISA阳性的CCYV样本中提取总RNA,用CCYV特异性引物RT-PCR扩增出353 bp的HSP70基因片段。利用所合成的CCYV cDNA探针,用斑点杂交技术验证了CCYV在单一感染和混合感染中的检测效果。从日本、中国、台湾、黎巴嫩和苏丹的甜瓜、西瓜、黄瓜和甜瓜分离的22株CCYV相似度最高(100%),而从伊朗的黄瓜和甜瓜分离的2株CCYV相似度最低(94.3%)。据我们所知,这是埃及黄瓜CCYV的第一份报告。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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