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Areca palm is an important tropical economic crop in Hainan Province. Areca palm yellow leaf disease (YLD) caused by phytoplasma infection is a devastating disease in the production of areca in China. In order to establish an accurate and efficient detection method for areca palm yellow leaf phytoplasma, this study designed and synthesized specific primers AMf/AMr and AM-Prode based on the 16S rDNA gene of areca palm yellow leaf phytoplasma. The method was used to test the accuracy, sensitivity, specificity and repeatability, and to detect phytoplasma diseases in other plants. The method could accurately detect the positive samples, and the healthy samples had no amplification curve. In the sensitivity test, the method could detect the sample concentration level of 1.16×101 copies/μL, and the standard curve equation was y=–3.4185x+43.624, the amplification efficiency was 96.12%, and the correlation coefficient R2=0.9833. In the specificity test, the method had good specificity for the detection of YLD, and the genomes of areca, other disease pathogens and the endophytes did not interfere with the method. In the repeatability test, the method had good repeatability for the detection of YLD. The detection method could be used to detect 8 phytoplasma diseases such as chinaberry yellow leaf disease, ‘Pericampylus glaucus’ witches' broom disease and pepper yellow leaf disease and the detection of phytoplasma has certain universality. The establishment of detection method is conducive to providing reliable technical means for the accurate diagnosis of YLD, pathogen monitoring and vector insect detection.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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