Mahgoub Hanan A, Wipf-Scheibel Catherine, Delécolle Brigitte, Pitrat Michel, Dafalla Gasim, Lecoq Hervé
INRA, Station de Pathologie Végétale, B.P. 94, 84143 Montfavet Cedex, France.
INRA, Station d'Amélioration des Plantes Maraîchères, B.P. 94, 84143 Montfavet Cedex, France.
Plant Dis. 1997 Jun;81(6):656-660. doi: 10.1094/PDIS.1997.81.6.656.
Melon rugose mosaic virus (MRMV) was isolated from snake cucumber (Cucumis melo var. flexuosus) in the Kassala region of Sudan in 1993. The host range of the virus was mostly limited to cucurbits, where it induced severe mosaic and leaf deformations. Cytopathological studies revealed severe chloroplast alterations, including vesicles at their periphery and the tendency to aggregate, which are typical of tymovirus infections, providing further evidence that MRMV is a tentative member of the genus Tymovirus. In melon and snake cucumber, MRMV was found to be seed transmitted at rates of 0.9 and 3.8%, respectively. Seed dissection experiments revealed that the virus could be detected in the seed coat, papery layer, and embryo. Seed disinfection treatments did not reduce seed transmission rates, which suggests an internal transmission. A preliminary screening for resistance in melon revealed some resistance in two out of 367 accessions tested.
1993年，在苏丹卡萨拉地区的蛇瓜（甜瓜变种弯角瓜）中分离出了甜瓜皱缩花叶病毒（MRMV）。该病毒的寄主范围大多局限于葫芦科植物，在这些植物上会引发严重的花叶病和叶片畸形。细胞病理学研究揭示了叶绿体的严重变化，包括叶绿体周边出现囊泡以及聚集的趋势，这是番茄病毒感染的典型特征，进一步证明MRMV是番茄病毒属的一个暂定成员。在甜瓜和蛇瓜中，发现MRMV的种子传播率分别为0.9%和3.8%。种子解剖实验表明，该病毒可在种皮、纸质层和胚中检测到。种子消毒处理并未降低种子传播率，这表明存在内部传播。对甜瓜进行的抗性初步筛选显示，在367份测试材料中有两份表现出一定抗性。
