|Title:||瓜類種子傳播病毒病害的特性||Other Titles:||Seed Transmissibility of Viruses in Cucurbits||Authors:||鄧汀欽
|Keywords:||瓜類;病毒;種媒;檢疫;cucurbit;virus;seed transmission;quarantine||Issue Date:||Mar-2005||Publisher:||中華種苗學會||Journal Volume:||7||Journal Issue:||1||Start page/Pages:||1-19||Source:||植物種苗||Abstract:||
Various kinds of cucurbits are widely cultivated in Taiwan and that result in serious viral diseases. Up to now, at least eight viruses including Cucurbit aphid-borne yellows virus (CABYV), Cucumber green mottle mosaic virus (CGMMV), Cucumber mosaic virus (CMV), Melon vein-banding mosaic virus (MVbMV), Watermelon type of Papaya ringspot virus (PRSV-W),Tomato spotted wilt virus (TSWV), Watermelon silver mottle virus (WSMoV) and Zucchini yellow mosaic virus (ZYMV) have been reported to infect cucurbits in Taiwan. The infection or mixed infection of these viruses caused symptoms to some degrees in the cucurbit plants and that affected the quality and quantity of yields. Among these indigenous viruses, only CGMMV and ZYMV were proven to be seed-transmissible. Squash mosaic virus (SqMV) mainly occurred in the Northern America, Melon necrotic spot virus (MNSV) in the Europe and Japan and Melon rugose mosaic virus (MRMV) in the Africa were reported respectively to be transmitted by seeds of cucurbits. Seed transmissions of CGMMV, ZYMV and MNSV were the results of virus infection or contamination on the seed coats. The inability of these viruses to replicate in the matured seed coats makes the difficulties to detect the viruses directly from the seeds, but they were readily eliminated by dry heat treatment. Embryo infection by SqMV or MRMV was observed and these viruses could be directly detected in the seed coat, papery layer and embryo. Seed disinfections by heat or chemical treatment did not reduce the seed transmission rates of SqMV and MRMV. MNSV, MRMV, SqMV, and ZYMV are enlisted as the quarantine pests by the Bureau of Animal and Plant Health Inspection and Quarantine, COA, Taiwan. The imported cucurbit seeds are subjected to quarantine requirements to avoid any phytosanitary risks. Conversely, CGMMV is drawn the quarantine attentions by the countries outside the Europe and Asia.
|Appears in Collections:||植物病理組|
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