A novel CaAbsi1 gene induced by early-abiotic stresses in pepper

Abstract

The full-length cDNA of CaAbsi1 encodes a presumptive protein of 134 amino acid residues that has homology to a putative zinc finger protein in its C-terminus. The deduced amino acid sequence has 50% homology to Oryza sativa NP001049-274, the function of which is unknown. Expression of CaAbsi1 was reduced in response to inoculation of non-host pathogens. On the other hand it was induced one hour after exposure to high concentrations of NaCl or mannitol, and six hours after transfer to low temperature. Induction also occurred in response to oxidative stress, methyl viologen, hydrogen peroxide and abscisic acid. Our results suggest that CaAbsi1 plays a role in multiple responses to wounding and abiotic stresses.

LeAbsi1 gene expression regulation by various abiotic and oxidative stresses

“…Recent studies have shown that several of the zinc finger protein families also play important roles in stress responses (Huang and Zhang 2007). A C 2 H 2 putative zinc finger domain protein that was isolated from pepper, CaAbsi1 (abiotic stress-induced gene 1) was significantly induced after exposure to various abiotic stresses (Seong and Wang 2008). Many proteins contain such C 2 H 2 putative zinc finger domains that are evolutionarily conserved in several plant species, suggesting a shared common or closely related biological function (Huang et al 2004).…”