中文摘要：

抗逆相关bZIP（Basic leucine zipper）转录因子家族基因主要参与ABA、干旱、高盐等胁迫应答反应,其过表达能够显著增强植物的抗逆性。本研究从偃麦草（Elytrigria repens L.）中分离到一个抗逆相关ErABF1（E.repens ABA Binding Factor 1）基因,氨基酸序列比对分析发现,该基因与小麦、玉米、拟南芥等bZIP转录因子基因同源性较高,亲缘关系较近;ErABF1基因的表达受到ABA、干旱、高盐、低温的强烈诱导;在2%PEG、200mmol·L^-1 NaCl胁迫培养基上初步功能分析表明,ErABF1过表达提高了转基因烟草对干旱、高盐的胁迫耐性。

英文摘要：

Abiotic stresses such as drought,high-salt and low temperature severely affect the growth and development of plant.It was reported that transcription factors played vital roles in regulating downstream gene expression and improving of adversity-resistance in plant.Stress-related bZIP transcription factors（basic leucine zipper） mainly participated in response to ABA,drought and high-salt stresses and its over-expression could significantly enhance the adversity-resistance of plants.In this study,Elytrigria repens with strong drought and salt tolerance was used to isolate and obtain a bZIP transcription factor gene,which was nominated as ErABF1（E.repens ABA Binding Factor 1）.Sequence analysis of amino acids showed that ErABF1 had higher homology and rather relative relationships with bZIP transcription factors of Arabidopsis,wheat and maize,etc.The expression of ErABF1 was intensively induced by ABA,drought,high-salt and low-temperature.Preliminarily functional analysis on the stress medium containing 2% PEG and 200 mM NaCl showed that ErABF1-overexpression improved the tolerance to drought and high-salt stresses in transgenic tobacco plants.