First Report of Tomato infectious chlorosis virus in Spain

Abstract

During the summer and autumn of 2001, symptoms of interveinal yellowing, bronzing, brittleness, and rolling of lower leaves were observed in greenhouse- and field-grown tomato (Lycopersicon esculentum) plants in Castellon Province in eastern Spain. Symptoms resembled those caused by the whitefly-transmitted criniviruses (1,2). Total RNA was extracted from 28 samples of symptomatic leaves collected in three greenhouses and one field and analyzed by reverse transcription-polymerase chain reaction using primers specific for Tomato chlorosis virus (ToCV) (1) and Tomato infectious chlorosis virus (TICV) (2). The 501-bp TICV-specific DNA fragment was amplified in four samples collected during the summer in three greenhouses and one field, and the 439-bp ToCV-specific DNA fragment was amplified in 15 samples collected during the autumn in the same three greenhouses; no mixed infections were found. The DNA fragments amplified from TICV were sequenced and showed 99 to 100% identity with the TICV isolates (GenBank Accession Nos. U67449 and AY048855) from the United States and Italy, respectively, confirming the diagnosis. One sequence was deposited as GenBank Accession No. AF479662. To our knowledge, this is the first report of TICV in Spain and the second in Europe. References: (1) D. Louro et al. Eur. J. Plant Pathol. 106:539, 2000. (2) A. M. Vaira et al. Phytoparasitica. In Press.