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EDP Sciences BIO Web of Conferences 184
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    초록·키워드

    The symptoms of Huanglongbing (HLB) disease are occasionally misunderstood with nutrient deficiency symptoms. The study aimed to develop HLB specific primer targeting the CLIBASIA_RS01220 gene sequence for HLB detection in citrus plants collected around Cimanggu, Bogor. A total of 21 citrus leaves showing HLB symptoms were subjected to the bacterial DNA isolation and subsequently were amplified with the newly designed primer, namely YihY primers, and the reference A2/J5 primers. Of these, 15 out of 21 collected citrus leaves exhibited positive detection of HLB yielded a band size of 930 bp as targeted amplicon of the YihY primer. On the other side, the primer A2/J5 succesfully detected positive amplicon band with a size of 703 bp from 17 out of 21 citrus leaves. Based on the homology sequences analysis, all of the HLB isolate sequences both amplified by YihY and A2/J5 primers had similarity with Candidatus Liberibacter asiaticus. The phylogenetic analysis, both based on YihY and A2/J5 primers showed the mixed between bacterial isolates collected from Japansche citroen maintained in the Cikeumeuh greenhouse and lime trees in Cimanggu greenhouse, assuming the HLB isolate has been transferred between the two greenhouses by the ability of Diaphorina citri to fly in far distance.

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