Phytoplasma diseases on major crops in Vietnam Hoat Trinh X.1,*, Quan Mai V.1, Anh Dang T. Lan1, Cuong Nguyen N.1, Vuong Pham T.1, Alvarez Elizabeth2, Nguyen Thuy T.D.1, Wyckhuys Kris3, Paltrinieri Samanta4, Pardo Juan M.2, Mejia Juan F.4, Thanh Nguyen D.1, Dickinson Matthew5, Duong Cao A.6, Kumasaringhe Nimal C.7, Bertaccini Assunta4 1Plant Protection Research Institute, Duc Thang, Bac Tu Liem, Ha Noi, Viet Nam 2Plant Pathology Program, Centro International de Agricultura Tropical, Cali, Colombia 3CIAT Office in Ha Noi, Viet Nam 4Department of Agricultural Sciences (DipSA), Plant Pathology, Alma Mater Studiorum, University of Bologna, Bologna, Italy 5School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, UK 6Sugarcane Research Institute, Phu An, Ben Cat, Binh Duong, Viet Nam 7Sugarcane Research Institute, Uda Walawe, Sri Lanka *Corresponding author e-mail: Trinh Xuan Hoat (trinhxuanhoatppri@gmail.com)
Online published on 2 January, 2015. Abstract The nested-PCR technique was applied to detect and identify phytoplasmas associated with major crops in Vietnam including sugarcane, cassava and longan. Phylogenetic analysis confirmed that phytoplasmas associated with the sugarcane grassy shoot and white leaf diseases belong to the rice yellow dwarf group (16SrXI). In cassava showing witches’ broom symptoms a mixed infection of phytoplasmas related to ‘Candidatus Phytoplasma asteris’ (group 16SrI) and ‘Ca. P. aurantifolia’ (group 16SrII) was detected. In samples showing longan witches’ broom disease three phytoplasmas including ‘Ca. P. aurantifolia’ (group 16SrII), elm yellows (group 16SrV) and “stolbur” (group 16SrXII) were identified. Top Keywords Phytoplasmas, cassava witches’ broom, sugarcane grassy shoot, sugarcane white leaf, longan witches’ broom. Top |