National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China.
Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Jena, 07745, Germany.
J Integr Plant Biol. 2021 Aug;63(8):1416-1421. doi: 10.1111/jipb.13104. Epub 2021 Jun 25.
The ubiquitous volatile linalool is metabolized in plants to nonvolatile derivatives. We studied Nicotiana attenuata plants which naturally vary in (S)-(+)-linalool contents, and lines engineered to produce either (R)-(-)- or (S)-(+)-linalool. Only (S)-(+)-linalool production was associated with slower growth of a generalist herbivore, and a large fraction was present as nonvolatile derivatives. We found that variation in volatile linalool and its nonvolatile glycosides mapped to the same genetic locus which harbored the biosynthetic gene, NaLIS, but that free linalool varied more in environmental responses. This study reveals how (S)-(+)-linalool and conjugates differ in their regulation and possible functions in resistance.
普遍存在的挥发性芳樟醇在植物中代谢为非挥发性衍生物。我们研究了尼丁香属衰减植物，其（S）-（+）-芳樟醇含量自然变化，并设计了产生（R）-（-）-或（S）-（+）-芳樟醇的品系。只有（S）-（+）-芳樟醇的产生与广谱草食动物的生长速度较慢有关，而且很大一部分以非挥发性衍生物的形式存在。我们发现，挥发性芳樟醇及其非挥发性糖苷的变异与含有生物合成基因 NaLIS 的相同遗传位点相关，但游离芳樟醇在环境响应中的变异更大。这项研究揭示了（S）-（+）-芳樟醇及其缀合物在调节和可能的抗性功能方面的差异。
