Emmanuel Christy Jeyaseelan, Manohara Sharmya, Shaw Michael Warren
Department of Botany, Faculty of Science, University of Jaffna, Jaffna, 40000 JA Sri Lanka.
School of Agriculture, Policy and Development, University of Reading, Reading, RG6 6BZ UK.
3 Biotech. 2020 Dec;10(12):506. doi: 10.1007/s13205-020-02502-z. Epub 2020 Nov 4.
Okra enation leaf curl is a newly emerging disease in commercial okra cultivation fields in Northern Sri Lanka. The present study aimed to identify and characterize the causative begomovirus and associated satellites. Okra plants showing the enation leaf curl disease symptoms were collected from Vavuniya and Jaffna districts of Northern Province. The PCR diagnostic and genome sequencing revealed that the symptomatic okra plants are associated with begomovirus, betasatellite, and alphasatellite complex. The begomovirus isolates shared 98.2-99.7% nucleotide identity with . The betasatellites showed 96-98.8% nucleotide identity with which is usually associated with Bhendi yellow vein mosaic disease. Two distinct alphasatellite species, and , were identified in leaf samples with enation leaf curl disease. The disease was transmitted by whiteflies from diseased plants to healthy plants. Hybrid varieties were more susceptible to the disease compared to cultivated varieties.
秋葵叶脉卷曲病是斯里兰卡北部商业秋葵种植区新出现的一种病害。本研究旨在鉴定并表征致病双生病毒及相关卫星分子。从北部省瓦武尼亚和贾夫纳地区采集了表现出叶脉卷曲病症状的秋葵植株。PCR诊断和基因组测序表明,有症状的秋葵植株与双生病毒、β卫星和α卫星复合体有关。双生病毒分离株与……具有98.2 - 99.7%的核苷酸同一性。β卫星与……具有96 - 98.8%的核苷酸同一性,后者通常与黄秋葵叶脉花叶病有关。在有叶脉卷曲病的叶片样本中鉴定出两种不同的α卫星种类,即……和……。该病害由粉虱从患病植株传播至健康植株。与栽培品种相比,杂交品种对该病更易感。