Effect of irrigation depth on biomass production and metabolic profile of Lippia alba (linalool chemotype) essential oil
Effect of irrigation depth on biomass production and metabolic profile of Lippia alba (linalool chemotype) essential oil
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DOI：
10.1016/j.agwat.2021.107393
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发表时间：
2022-03-31
影响因子：
6.7
通讯作者：
Marques, Marcia Ortiz M.
中科院分区：
文献类型：
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作者：
Mendoza, Juan D. S.;Correia, Lilian C.;Marques, Marcia Ortiz M.
水是农业生产的限制因素。在芳香植物的栽培中，非生物因素，如水分亏缺，影响精油的产量和组成。Lippia alba，芳樟醇化学型，是一种原产于南美洲的驯化芳香物种，可用于化妆品工业，开发天然产品，如调味品，香料和香水。到目前为止，水分亏缺对该物种的农艺性状和精油成分的影响尚未进行评估。本研究测定了不同无性系的地上总干物质生产量、叶片总干物质生产量、精油生产量及精油的化学成分。在四个不同的灌溉深度下，使用有机生产系统，在四个90天的切割周期期间，对白葡萄进行了评估。L.挥发油中检测出19种化合物。阿尔巴。灌溉处理改变了化合物芳樟醇、香叶醛、β-榄香烯和大根香叶烯D的相对比例。地上部分的总生物量生产最高，在形成修剪后180（第二次切割）和270（第三次切割）天获得参考蒸散量（ET 0）的125%。灌溉深度为100%，主要是125%ET0在180天（第二次切割）有利于总干物质生产的叶在Lippia alba，化学型芳樟醇，精油生产。一般来说，适度的缺水会导致水资源利用的调整，增加精油产量，特别是芳樟醇化合物。
Water is a limiting factor in agricultural production. In the cultivation of aromatic plants, abiotic factors, such as water deficit, influence the yield and composition of essential oils. Lippia alba, linalool chemotype, is an aromatic species originally from South America in domestication, and it can be used in the cosmetics industry to develop natural products, such as flavorings, fragrances, and perfumes. So far, the effect of water deficit on the agronomic characteristics and the species' essential oil composition has not been evaluated. In this work, total aerial dry matter production, total leaf dry matter production, essential oil production, and chemical composition of the essential oil from the leaves of selected clones of L. alba were evaluated under four different irrigation depths, using an organic production system during four cutting cycles of 90 days. Nineteen compounds were detected in the essential oil of L. alba. The irrigation treatments altered the relative proportions of the compounds linalool, geranial, beta-elemene, and germacrene D. The highest total biomass production of the aerial part was obtained with the 125% of the reference evapotranspiration (ET0) at 180 (second cut) and 270 (third cut) days after formation pruning. The irrigation depths of 100% and mainly the 125% ET0 at 180 days (second cut) favored the total dry matter production of leaves in Lippia alba, chemotype linalool, and the essential oil production. In general, a moderate water deficit generated an adjustment in the use of water resources with increased the essential oil production, in particular the linalool compound.