IBR   13079
INSTITUTO DE BIOLOGIA MOLECULAR Y CELULAR DE ROSARIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Analysis of microRNAs involved in defense response signaling against Xanthomonas spp. in Citrus limon
Autor/es:
CHIESA M.A.; TORRES P.S.; CAMPOS, L.; ROESCHLIN R.A.; GERHARDT N.; FILIPPONE M.P.; CONEJERO, V.; CASTAGNARO A. P.; VOJNOV A. A; GMITTER JR, F.G.; GADEA VACAS J.; MARANO M. R.
Lugar:
Valencia
Reunión:
Congreso; XII International Citrus Congress; 2012
Resumen:
MicroRNAs (miRNAs) are small conserved noncoding RNAs of ~ 22 nt long that are present in most eukaryotc
genomes. They play a fundamental role as negatve regulators of target genes, which are involved in diferent
signaling pathways of biological processes, such as development, hormone signaling and response to
biotc and abiotc stresses. Citrus spp. is severely aficted by Asiatc Citrus Bacterial Canker (CBC), a disease
caused by Xanthomonas citri subsp. citri (XC). To get insight into the plant defense responses that could
ameliorate canker development, we studied C. limon miRNAs expression in the interacton with a highly
virulent strain (XC), a non-pathogen strain of citrus (X. campestris pv. campestris, Xcc) and a strain that
generates a hypersensitve response (X. fuscans pv aurantifoli strain C, Xfa-C). The obtained results revealed
interestng expression paterns for some of the miRNAs involved in hormone signaling pathways (miR159,
miR160, miR167, miR393), oxidatve stress (miR398) and cell-wall strengthening (miR408). These miRNAs
are presumably regulatng target genes involved in signalling pathways important for C. limon resistance. The
biological signifcance of the diferental expression of the assayed miRNAs in compatble, incompatble and
non-pathogenic interactons is discussed.