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Zhan-Min Sun,Yan-Min Wu,Mei-Liang Zhou,Xing-Guo Xiao,Yi-Xiong Tang 한국식물생명공학회 2014 Plant biotechnology reports Vol.8 No.4
The APETALA2/ethylene-responsive elementbinding factors (AP2/ERF) play central roles in the stressresponse in plants. In this study, we identified and isolateda novel salt stress-related gene, LcERF080, that encodes anAP2/ERF protein in Lotus corniculatus cultivar Leo. LcERF080 was classified into the B-4 group of the ERFsubfamily based on multiple sequence alignment andphylogenetic characterization. Expression of LcERF080was strongly induced by salt, abscisic acid, 1-aminocyclopropane-1-carboxylic acid, methyl jasmonate, and salicylicacid stresses. Subcellular localization assay confirmedthat LcERF080 is a nuclear protein. LcERF080 overexpressionin Arabidopsis resulted in pleiotropic phenotypeswith a higher seed germination rate and transgenic plantswith enhanced tolerance to salt stress. Further, under stressconditions, the transgenic lines exhibited elevated levels ofsoluble sugars and proline as well as relative moisturecontents but a lower malondialdehyde content than incontrol plants. The expression levels of hyperosmoticsalinity response genes COR15A, RD22, and P5CS1 werefound to be elevated in the LcERF080-overexpressingArabidopsis plants compared to the wild-type plants. Theseresults reveal that LcERF080 is involved in the responsesof plants to salt stress.