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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >WIN1, a transcriptional activator of epidermal wax accumulation in Arabidopsis
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WIN1, a transcriptional activator of epidermal wax accumulation in Arabidopsis

机译：WIN1，拟南芥中表皮蜡积累的转录激活因子

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摘要

Epicuticular wax forms a layer of hydrophobic material on plant aerial organs, which constitutes a protective barrier between the plant and its environment. We report here the identification of WIN1, an Arabidopsis thaliana ethylene response factor-type transcription factor, which can activate wax deposition in overexpressing plants. We constitutively expressed WIN1 in transgenic Arabidopsis plants, and found that leaf epidermal wax accumulation was up to 4.5-fold higher in these plants than in control plants. A significant increase was also found in stems. Interestingly, approximate to50% of the additional wax could only be released by complete lipid extractions, suggesting that not all of the wax is superficial. Gene expression analysis indicated that a number of genes, such as CER1, KCS1, and CER2, which are known to be involved in wax biosynthesis, were induced in WIN1 overexpressors. This observation indicates that induction of wax accumulation in transgenic plants is probably mediated through an increase in the expression of genes encoding enzymes of the wax biosynthesis pathway. [References: 43]
机译：表皮蜡在植物气生器官上形成一层疏水材料，构成植物及其环境之间的保护性屏障。我们在这里报告WIN1的鉴定，拟南芥乙烯反应因子型转录因子WIN1可以激活过表达植物中的蜡沉积。我们在转基因拟南芥植物中组成型表达WIN1，并且发现这些植物中的叶表皮蜡积累比对照植物高4.5倍。茎中也发现显着增加。有趣的是，大约只有50％的额外蜡只能通过完全的脂质萃取来释放，这表明并非所有的蜡都是表面蜡。基因表达分析表明，WIN1过表达子中诱导了许多基因，如CER1，KCS1和CER2，这些基因与蜡的生物合成有关。该观察结果表明，转基因植物中蜡积累的诱导可能是通过增加编码蜡生物合成途径的酶的基因的表达来介导的。 [参考：43]

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