| 摘要 |
［Objectives］The paper was to detect and identify the phytoplasma of Cleome rutidosperma in areca palm yellow leaf disease (YLD) field in Wenchang City, Hainan Province, China. ［Methods］ The nested PCR technique was employed to amplify the phytoplasma 16S rDNA of C. rutidosperma samples, followed by sequence analysis. Concurrently, this study examined C. rutidosperma in YLD field, collecting symptomatic leaves for phytoplasma detection. ［Results］ The 16S rDNA sequence of the C. rutidosperma witches’-broom phytoplasma was found to be identical to that of the HNWC5 strain associated with areca palm yellows phytoplasma, leading to the identification of this phytoplasma as belonging to the 16SrII-A subgroup. Field investigations revealed a higher incidence of C. rutidosperma in areca palm fields, with symptoms of leaf yellows observed in six of these fields. Quantitative PCR (qPCR) analysis confirmed the presence of phytoplasma infection in these instances. ［Conclusions］ Through the analysis of geographical distribution, sequence alignment, and field occurrence data, a significant correlation has been identified between witches’ broom disease and YLD. It is proposed that the former may act as an intermediate host for the areca palm yellows phytoplasma. |
