Page 43 - 《广西植物》2022年第12期
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12 期                 王丽娟等: 油橄榄 AP2 / ERF 转录因子鉴定及水胁迫表达分析                                   2 0 3 3

                 ( 1. College of Forestryꎬ Southwest Forestry Universityꎬ Kunmingꎬ 650224ꎬ Chinaꎻ 2. Key Laboratory of Forest Plant Cultivation and
                            Utilizationꎬ Key Laboratory of Rare and Endangered Forest Plants of State Forestry Administrationꎬ
                                   Yunnan Academy of Forestry & Grassland Scienceꎬ Kunmingꎬ 650201ꎬ China )


                 Abstract: In order to explore the response mechanism of AP2/ ERF gene family in the water stress of O. europaeaꎬ this
                 study performed transcriptome sequencing on the roots and leaves of two cultivars ‘Frantoio’ and ‘TYZ ̄1’ that were
                 under drought and flooding stresses. And based on the whole genome dataꎬ the protein physicochemical propertiesꎬ gene
                 structure and system evolution of AP2/ ERF transcription factor in O. europaea were analyzed. At the same timeꎬ the
                 difference in gene expression of AP2/ ERF transcription factor related to water stress in the two O. europaea cultivars was
                 analyzed by transcriptome sequencing data and verified by RT ̄qPCR. The results were as follows: (1) A total of 110
                 AP2/ ERF gene family members were identified in O. europaea. The amino acid size of the 110 proteins was 173-717bpꎬ
                 there was no signal peptide and it was a non ̄secreted protein. The phylogenetic tree was constructed between O. europaea
                 AP2/ ERF and model plant Arabidopsis AP2/ ERF protein. It was found that O. europaea AP2/ ERF protein was divided
                 into four categoriesꎬ AP2ꎬ RAVꎬ ERF and Solosist. Among themꎬ ERF was divided into two subtypesꎬ ERF and
                 DREB. ERF included six subtypes of ERF B1 to ERF B6ꎬ and DREB included six subtypes of DREB A1 to DREB A6ꎬ
                 which was consistent with the classification of the model plant Arabidopsis AP2/ ERF. Each subfamily contained
                 AP2/ ERF proteins of O. europaea and Arabidopsis at the same timeꎬ indicating that the AP2/ ERF family of Arabidopsis
                 and O. europaea were similar in evolution. (2) The analysis of gene structure and conserved elements found that the
                 proteins of the same subfamily of O. europaea AP2/ ERF had the same gene structure and conserved elements. Combining
                 gene expression with genes with known water regulation functions in the evolutionary treeꎬ it was preliminarily speculated
                 that OeAP2 ̄75ꎬ OeAP2 ̄97ꎬ OeAP2 ̄101ꎬ OeAP2 ̄23 and OeAP2 ̄13 were closely related to the water regulation of
                 O. europaeaꎬ OeAP2 ̄13ꎬ OeAP2 ̄28ꎬ OeAP2 ̄104ꎬ OeAP2 ̄75ꎬ OeAP2 ̄80 and OeAP2 ̄50 had different expression levels in
                 the two cultivars. It is speculated that this may be the reason for the different resistance of ‘ Frantoio ’ and
                 ‘TYZ ̄1’. (3) The RT ̄qPCR technique was used to detect the expression changes of O. europaea AP2/ ERF gene under
                 different stresses. The results showed that OeAP2 ̄101ꎬ OeAP2 ̄28 and OeAP2 ̄42 were significantly up ̄regulated by water
                 stressꎬ which was consistent with the results of transcriptome analysis. The results of this study lay a foundation for the
                 research on the stress resistance expression and gene function of the AP2/ ERF family genes of O. europaeaꎬ and provides
                 the method and theoretical basis for the selection of drought ̄resistant and flood ̄tolerant rootstock cultivars
                 of O. europaea.
                 Key words: Olea europaeaꎬ AP2/ ERF transcription factorꎬ bioinformaticsꎬ gene expression profileꎬ water stress



                植物在自然界生长发育和进化的过程中ꎬ通                            al.ꎬ 2015)ꎬ各个亚家族在植物体内有不同的功
            常面临着诸如干旱、水淹、极端高低温、高盐等非                             能ꎬAP2 亚家族包含 2 个 AP2 保守结构域ꎬ主要与
            生物胁迫ꎬ这对植物的生长、发育产生了负面影                              植物 生 长 发 育 及 细 胞 生 长 分 化 有 关 ( 纪 晴 等ꎬ
            响ꎮ 目前ꎬ研究发现在非生物胁迫中起重要作用                             2018)ꎬRAV 含有 1 个 AP2 结构域和 1 个 B3 DNA

            的转 录 因 子 包 括 AP2 / ERF、 WRKY、 NAC、 MYB、            结合域ꎬ通常在乙烯、芸苔素内酯及一些生物和非
            ZFP、bHLH 等家族( Xu et al.ꎬ 2011)ꎮ AP2 / ERF          生物胁 迫 中 起 作 用 ( 柯 希 望 等ꎬ 2020)ꎻ ERF 和
            是植物中最大的转录因子家族之一ꎬ涉及植物的                              Soloist 只包含 1 个 AP2 结构域ꎬ其中 ERF 又分为
            生长发育及各个生理过程ꎬ参与植物非生物胁迫                              DREB 和 ERF 2 个亚类ꎬ通常与植物的生物胁迫、
            调控机制ꎬAP2 / ERF 家族蛋白的主要特征是含有                        干旱、高盐、低温、热胁迫、多重胁迫相关( 刘志薇

            1 个或 2 个 AP2 结合域ꎬ每个 AP2 结合域含 58 ~                  等ꎬ2014ꎻ苟艳丽等ꎬ2020)ꎮ AP2 / ERF 转 录 因 子
            70 个氨基酸残基(Cao et al.ꎬ 2020)ꎮ 根据 AP2 家              在植物生长发育及非生物胁迫中起关键的调控作
            族蛋白结构域中特征元件的种类和数量不同可将                              用ꎬ如沙柳( Salix cheilophila) SpsDREB8 基因在干

            其分为 AP2、ERF、RAV、Soloist 4 个亚家族( Wu et              旱胁 迫 下 表 达 下 调 ( 王 雷 等ꎬ 2021 )ꎬ 拟 南 芥
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