Electronic Journal of Biotechnology
versión On-line ISSN 0717-3458
DIAZ, Mauricio; POLANCO, Victor; RAMIREZ, Ingrid y PENA-CORTES, Hugo. Molecular cloning and expression analysis of 12-oxophytodienoate reductase cDNA by wounding in Solanum tuberosum. Electron. J. Biotechnol. [online]. 2012, vol.15, n.1, pp. 10-10. ISSN 0717-3458.
Jasmonic acid (JA) and 12-oxophytodienoic acid (OPDA) are signal molecules involved in the stress and defense responses in plants. A full-length cDNA clon of OPR3 encoding 12-oxophytodienoate reductase 3, key enzyme involved in the biosynthesis of JA from linolenic acid was obtained from a Solanum tuberosum cDNA library. Sequence analysis showed that OPR3 encoded a polypeptide of 400 amino acids with a predicted molecular mass of 43.9 kDa and pI of 7.72. The deduced amino acid sequence of OPR3 showed high similarities to other 12-oxophytodienoate reductases. A peroxisomal signal sequence indicates OPR3 probable location in peroxisome. Levels of OPR3 mRNA accumulated in potato leaves reaching maximum levels within 1 hr of mechanical wounding. Elevated levels of JA were correlated to expression of the OPR3 gene.
Palabras clave : 12-oxophytodienoate reductase; jasmonic acid; OPDA; Solanum tuberosum; stress; wounding.