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首页> 外文期刊>Journal of Experimental Botany >Ethylene-induced modulation of genes associated with the ethylene signalling pathway in ripening kiwifruit
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Ethylene-induced modulation of genes associated with the ethylene signalling pathway in ripening kiwifruit

机译：乙烯诱导的猕猴桃乙烯信号通路相关基因的调控

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摘要

Gene families associated with the ethylene signal transduction pathway in ripening kiwifruit (Actinidia deliciosa [A. Chev.] C.F. Liang et A.R. Ferguson var. deliciosa cv. Hayward) were isolated from a kiwifruit expressed sequence tag (EST) database, including five ethylene receptor genes, two CTR1-like genes, and an EIN3-like gene AdEIL1. All were differentially expressed among various kiwifruit vine tissues, and none was fruit specific. During fruit development, levels of transcripts of AdERS1a, AdETR3, and the two CTR1-like genes decreased, whereas those of AdERS1b and AdETR2 peaked at 97 d after full bloom. In ripening kiwifruit, there was a diverse response of the ethylene receptor family to internal and external ethylene. AdERS1a, AdETR2, and AdETR3 expression increased at the climacteric stage and transcripts were induced by external ethylene treatment, while AdERS1b showed no response to ethylene. AdETR1 was negatively regulated by internal and external ethylene in ripening fruit. The two CTR1-like genes also had different expression patterns, with AdCTR1 increasing at the climacteric stage and AdCTR2 undergoing little change. 1-Methylcyclopropene treatment prevented the ethylene response of all components, but transient down-regulation was only found with AdETR2 and AdCTR1. Similar gene and ethylene responses were found in both fruit flesh and core tissues. The ethylene-induced down-regulation of AdETR1 suggests that it may have a role in sensing ethylene and transmitting this response to other members of the receptor family, thus activating the signal transduction pathway.
机译：从猕猴桃表达序列标签（EST）数据库中分离了与成熟猕猴桃中的乙烯信号转导途径相关的基因家族（猕猴桃（Actinidia deliciosa [A. Chev。] CF Liang等人，AR Ferguson var。deliciosa cv。Hayward）），包括五个乙烯受体基因，两个类似CTR1的基因和一个类似EIN3的基因AdEIL1。所有这些在猕猴桃的各种藤蔓组织中都有差异表达，并且没有一个是特定于水果的。在果实发育过程中，AdERS1a，AdETR3和两个CTR1样基因的转录水平下降，而AdERS1b和AdETR2的转录水平在盛开后第97天达到峰值。在成熟猕猴桃中，乙烯受体家族对内部和外部乙烯的反应多种多样。在更年期阶段，AdERS1a，AdETR2和AdETR3的表达增加，并且转录由外部乙烯处理诱导，而AdERS1b对乙烯无反应。 AdETR1在成熟果实中受到内部和外部乙烯的负调控。两个类似CTR1的基因也具有不同的表达模式，其中AdCTR1在更年期阶段增加，而AdCTR2几乎没有变化。 1-甲基环丙烯处理阻止了所有组分的乙烯反应，但是仅在AdETR2和AdCTR1中发现瞬时下调。在果肉和核心组织中都发现了相似的基因和乙烯反应。乙烯诱导的AdETR1的下调表明它可能在感知乙烯并将这种反应传递给受体家族的其他成员方面起作用，从而激活信号转导途径。

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