Occurrence and distribution of ‘Candidatus Phytoplasma trifolii’ associated with diseases of solanaceous crops in Lebanon |
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Authors: | Elia Choueiri Pascal Salar Fouad Jreijiri Souheir El Zammar Randa Massaad Hani Abdul-Nour Joseph-Marie Bové Jean-Luc Danet Xavier Foissac |
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Institution: | (1) Lebanese Agricultural Research Institute, Tal Amara, PO Box 287, Zahle, Lebanon;(2) Faculté des Sciences II, Université Libanaise, Fanar, Liban;(3) UMR Génomique Diversité et Pouvoir Pathogène, INRA Université Victor Ségalen Bordeaux 2, BP 81, 33883 Villenave d’Ornon cedex, France |
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Abstract: | A survey for phytoplasma diseases in tomato and pepper fields in Lebanon was conducted during 2003 and 2004. Tomato plants
with stunting, yellowing or purplish leaves, proliferation of laterals buds, hypertrophic calyxes and virescent flowers were
found in 25% of the tomato fields surveyed, where they represented 2–8% of the plants. Pepper plants displaying stunting and
yellowing of leaves, were found in 27% of the fields and 1–4% of the plants were affected. Phytoplasmas infecting tomato and
pepper had identical 16S-rDNA RFLP profiles and sequences. A phytoplasma isolate named PTL was transmitted by dodder from
a diseased tomato plant to a periwinkle (Catharanthus roseus) plant in which it induced leaf yellowing, virescence and phyllody. 16S-rDNA phylogenetic analysis classified PTL as a strain
of ‘Candidatus Phytoplasma trifolii’. |
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Keywords: | Tomato disease Pepper disease Lebanon Phloem-restricted bacteria Leafhopper Psyllid |
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