排序方式: 共有79条查询结果,搜索用时 31 毫秒
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油棕猝倒病菌是我国进境植物检疫性有害生物。试验应用环介导等温扩增(loop-mediated isothermal amplification,LAMP)技术建立了一种快速敏感的油棕猝倒病菌检测方法。根据ITS区基因上的8个位点,共设计了6条引物,并对反应条件和反应体系进行优化。特异性试验结果表明,引物对油棕猝倒病菌的检测具有良好的特异性;灵敏度试验结果表明引物最低检出限为0。12 ng·μL-1比普通PCR高100倍;检测结果经SYBR Green Ⅰ染色后,肉眼即可观察结果。该方法能够快速、灵敏、特异地检测油棕猝倒病菌,只需一台水浴锅就可以开展检测,非常适合基层现场检测。 相似文献
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采用逆转录环介导等温扩增技术(RT\|LAMP),建立一种便捷、灵敏的大蒜X病毒(Garlic virus X, GarVX)的快速检测方法。根据GarVX ORF4序列的保守区设计6条特异性引物,分别识别该保守区的8个位点,在反转录酶和Bst DNA聚合酶的作用下对靶序列进行扩增反应。通过条件优化,在65℃恒温条件下温浴60 min可成功检测GarVX。特异性检测结果表明,该方法可特异性检出GarVX,对大蒜A病毒(Garlic virus A, GarVA)、大蒜D病毒(Garlic virus D, GarVD)、大蒜E病毒(Garlic virus E, GarVE)等的检测均为阴性,且检测灵敏度高,最低检出限为5 pg·μL-1,是RT\|PCR方法的10倍。试验结果表明,RT\|LAMP检测方法可快速、特异、灵敏地检测GarVX,并适合现场快速检测。 相似文献
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进境意大利苹果苗上葡萄茎枯病菌的截获鉴定 总被引:1,自引:0,他引:1
The isolate ZM40-1 was isolated on Mallus sp. imported from Italy in Ningbo port traditional PDA method. The isolate grew well on three kind of medium, including PDA, MEA and OA, producing mostly little aerial mycelium and abunt pycnidia. The pycnidia were globose or subglobose, 36.4-191.8(87.2) μm in diameter and conidia were variable in shape, mostly ovoid-ellipsoidal, single cell, sometimes curved, 3.3-6.2(5.1)μm ×1.9-3.1(2.7) μm in diameter and hyaline. Chlamydospores were mostly multicellular, solitary or in chains, brown and 18.0-48.0(35.2) μm×7.4-18.7(13.8) μm in size. To compare the isolate sequences (ITS, 28S, ACT and TUB) with the identity of respestive sequence of Phoma glomerata from NCBI GenBank databases by blastn method, the isolate DNA was amplified and sequenced by universal primers. Analysis of these sequences with the related sequences deposited in the NCBI database showed that these sequence had 100% identities, respectively. Pathogenicity tests showed that the isolate didn’t infect stem of Mallus sp.. However, the fruit and leaf were susceptible to P. glomerata. Based on morphological characteristics, molecular and pathogenicity test results, the isolate ZM40-1 was identified as Phoma glomerata (Corda) Wollenweber & Hochapfel. To our know-ledge, this is the first report of interception and identification of P. glomerata in China. 相似文献
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