Foliar application of methyl jasmonate does not increase terpenoid accumulation, but weakly elicits terpenoid pathway genes in sandalwood (Santalum album L.) seedlings
Foliar application of methyl jasmonate does not increase terpenoid accumulation, but weakly elicits terpenoid pathway genes in sandalwood (Santalum album L.) seedlings
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DOI：
10.5511/plantbiotechnology.14.1014a
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发表时间：
2014-12-01
影响因子：
1.6
通讯作者：
Bohlmann, Joerg
中科院分区：
文献类型：
--
作者：
Kuelheim, Carsten;Jones, Christopher G.;Bohlmann, Joerg
檀香（Santalum album L.）茎和根中富含倍半萜类精油，是香水行业备受追捧的商品。澳大利亚北部正在建立檀香种植园，但宝贵的心材精油在 10 年内不会大量积累，而商业上可行的采收通常至少需要 15 年才能进行。在早期阶段诱导精油积累，或增加成熟树木的油产量，可能有可能提高种植园的石油生产率。在这项研究中，我们研究了叶面喷施茉莉酸甲酯对不到一年的檀香幼苗的影响。茎和根的精油积累均不受影响。然而，在基因转录水平上，檀香油成分生物合成早期的几个关键基因在叶和茎中均被诱导。这些结果表明，白檀中的萜类生物合成确实对叶面施用茉莉酸甲酯有反应，但影响很小，并且檀香醇的完全生物合成可能受到发育调节。
The sesquiterpenoid rich essential oils of sandalwood (Santalum album L.) stems and roots are a highly sought commodity in the fragrance industry. Plantations of sandalwood are being established in northern Australia, however the valuable heartwood essential oils do not accumulate in substantial amounts before 10 years, while commercially viable harvests do not normally take place for at least 15 years. Inducing essential oil accumulation at an earlier stage, or increasing oil yield in mature trees, may have the potential to enhance the oil productivity of plantations. In this study, we investigated the effects of foliar application of methyl jasmonate on less than one-year-old sandalwood seedlings. Essential oil accumulation was unaffected in both stems and roots. However, at the gene transcript level, several key genes early in the biosynthesis of sandalwood oil components were induced in both leaves and stems. These results suggest that terpenoid biosynthesis in S. album does indeed respond to foliar application of methyl jasmonate, however the effects are small and the full biosynthesis of santalols is likely to be developmentally regulated.