Plant Virology Unit, Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi, 110012 India.
Indian J Microbiol. 2012 Mar;52(1):13-21. doi: 10.1007/s12088-011-0113-6. Epub 2011 Jan 29.
High incidence (up to 40%) of symptoms of yellowing and yellow mottling was observed in 5-8 years old orchards of kinnow mandarin {Citrus reticulate Balanco ('King' × 'Willow mandarin')} in the Punjab state of India during a survey in January 2007. These symptoms are often confused with nutrient deficiency and other stress related disorders. However, a greening bacterium has been attributed to cause the disease. The disease was graft transmissible and sequencing of 16S rRNA, 16S/23S intergenic spacer region and 23S rRNA of the greening bacterium associated with yellowing disease in kinnow mandarin confirmed it to be Candidatus Liberibacter asiaticus ('Ca L. asiaticus') showing maximum identity of 95.9% with 'Ca L. asiaticus' from USA and Brazil in 16S rRNA. The study indicates definite association of 'Ca L. asiaticus' with yellowing/chlorotic mottling symptoms of greening disease of kinnow mandarin in Punjab state of India.
在 2007 年 1 月的一次调查中,发现印度旁遮普邦 5-8 岁的橘红橘(Citrus reticulate Balanco(‘King’בWillow mandarin'))果园中,高达 40%的果实出现黄化和黄斑症状。这些症状常与营养缺乏和其他应激相关疾病混淆。然而,一种绿杆菌已被认为是导致该病的原因。该病可通过嫁接传播,对与橘红橘黄化病相关的绿杆菌 16S rRNA、16S/23S 基因间隔区和 23S rRNA 进行测序,证实其为亚洲韧皮杆菌(Candidatus Liberibacter asiaticus(‘Ca L. asiaticus')),与来自美国和巴西的‘Ca L. asiaticus'在 16S rRNA 上的同源性最高可达 95.9%。该研究表明,亚洲韧皮杆菌(Ca L. asiaticus)与印度旁遮普邦橘红橘绿化病的黄化/斑驳症状有明确的关联。