ABSTRACT It is known that the first osmotic phase affects the growth rates of roots immediately upon addition of salt; thus, dissecting metabolites profiling provides an opportunity to throw light into the basis of plant tolerance by searching for altered signatures that may be associated with tolerance at this organ. This study examined the influence of salt treatment on fatty acid composition and chemical composition of the essential oil of C. aurantium roots. Results proved that, under salt treatment, an increase of double bond index and linoleic desaturation ratio was pointed out. On the other hand, the reduction of saturated fatty acids was spotted. Such treatment also induced quantitative changes in the chemical composition of the essential oils from C. aurantium roots and increased markedly the rates of monoterpenes, while the sesquiterpenes decreased significantly. Both primary and secondary metabolites were found to be significantly salt responsive, including one fatty acid (palmitoleic acid) and six volatiles (E-2-dodecenal, tetradecanal, γ-Elemene, trans-caryophyllene, α-Terpinene and germacrene D). Plasticity at the metabolic level may allow Citrus plants to acclimatize their metabolic ranges in response to changing environmental conditions.

中文翻译：

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柑橘根中 NaCl 反应性代谢物的鉴定：脂质组学和挥发性特征

摘要 众所周知，第一渗透阶段会在加盐后立即影响根的生长速度；因此，剖析代谢物分析提供了一个机会，通过寻找可能与该器官耐受性相关的改变特征来了解植物耐受性的基础。本研究考察了盐处理对枳壳精油的脂肪酸组成和化学组成的影响。结果证明，盐处理下，双键指数和亚油酸去饱和率均有所提高。另一方面，发现饱和脂肪酸的减少。这种处理还引起了枳壳精油化学成分的数量变化，并显着增加了单萜的含量，而倍半萜烯显着减少。初级和次级代谢物都被发现对盐有显着的反应，包括一种脂肪酸（棕榈油酸）和六种挥发物（E-2-十二碳烯醛、十四碳烯醛、γ-榄香烯、反式石竹烯、α-萜品烯和锗烯 D）。代谢水平的可塑性可能允许柑橘植物适应其代谢范围以响应不断变化的环境条件。