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首页> 美国卫生研究院文献>International Journal of Molecular Sciences >AOX1-Subfamily Gene Members in Olea europaea cv. Galega Vulgar—Gene Characterization and Expression of Transcripts during IBA-Induced in Vitro Adventitious Rooting
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AOX1-Subfamily Gene Members in Olea europaea cv. Galega Vulgar—Gene Characterization and Expression of Transcripts during IBA-Induced in Vitro Adventitious Rooting

机译：Olea europaea cv中的AOX1亚家族基因成员。 Galega Vulgar-IBA诱导的不定根生根过程中转录本的基因表征和表达

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Propagation of some Olea europaea L. cultivars is strongly limited due to recalcitrant behavior in adventitious root formation by semi-hardwood cuttings. One example is the cultivar ”Galega vulgar”. The formation of adventitious roots is considered a morphological response to stress. Alternative oxidase (AOX) is the terminal oxidase of the alternative pathway of the plant mitochondrial electron transport chain. This enzyme is well known to be induced in response to several biotic and abiotic stress situations. This work aimed to characterize the alternative oxidase 1 (AOX1)-subfamily in olive and to analyze the expression of transcripts during the indole-3-butyric acid (IBA)-induced in vitro adventitious rooting (AR) process. OeAOX1a (acc. no. ) and OeAOX1d (acc. no. ) were identified, as well as different transcript variants for both genes which resulted from alternative polyadenylation events. A correlation between transcript accumulation of both OeAOX1a and OeAOX1d transcripts and the three distinct phases (induction, initiation, and expression) of the AR process in olive was observed. Olive AOX1 genes seem to be associated with the induction and development of adventitious roots in IBA-treated explants. A better understanding of the molecular mechanisms underlying the stimulus needed for the induction of adventitious roots may help to develop more targeted and effective rooting induction protocols in order to improve the rooting ability of difficult-to-root cultivars.
机译：由于半硬木插条在不定根形成中的顽强行为，强烈限制了某些油橄榄欧洲栽培种的繁殖。一个例子是品种“ Galega vulgar”。不定根的形成被认为是对压力的形态反应。替代氧化酶（AOX）是植物线粒体电子传输链替代途径的末端氧化酶。众所周知，该酶是响应几种生物和非生物胁迫情况而被诱导的。这项工作旨在表征橄榄中的替代氧化酶1（AOX1）-亚家族，并分析吲哚-3-丁酸（IBA）诱导的体外不定根（AR）过程中转录物的表达。鉴定出OeAOX1a（acc。no。）和OeAOX1d（acc。no。），以及由于交替的多腺苷酸化事件而导致的两个基因的不同转录物变体。观察到OeAOX1a和OeAOX1d转录本的转录本积累与橄榄中AR过程的三个不同阶段（诱导，起始和表达）之间的相关性。橄榄AOX1基因似乎与IBA处理的外植体中不定根的诱导和发育有关。更好地理解诱导不定根刺激的分子机制可能有助于开发更有针对性和更有效的生根诱导方案，以提高难生根品种的生根能力。

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