Bustamante Maria Ángeles, Michelozzi Marco, Barra Caracciolo Anna, Grenni Paola, Verbokkem Janine, Geerdink Peter, Safi Carl, Nogues Isabel
Department of Agrochemistry and Environment, Miguel Hernandez University, EPS-Orihuela, ctra. Beniel km 3.2, 03312 Orihuela, Spain.
Institute of Biosciences and Bioresources, National Research Council, via Madonna del Piano 10, 50019 Sesto Fiorentino, Florence, Italy.
Plants (Basel). 2020 Jul 2;9(7):830. doi: 10.3390/plants9070830.
is an evergreen aromatic plant with important commercial interest as it contains numerous essential oils (composed of terpenoid compounds) and phenolic constituents (natural antioxidant compounds). This work aims at evaluating the concomitant effects of different inorganic and organic fertilization treatments and the subsequent increases in soil nutrient availability on terpenoids and other carbon-based secondary metabolites, e.g., flavonoids and phenolic compounds, in leaves. The results showed that, as expected, the structural carbohydrate content (lignocellulosic compounds) in stems was higher in fertilized plants than in controls. Additionally, positive correlations were observed of the absolute amounts of total terpenoids and some single terpenoid compounds with N or P contents in leaves. On the contrary, the phenolic and flavonoid concentrations in all the rosemary plant parts were lower with the fertilization treatments. Indeed, negative correlations between the phenolic compounds (and flavonoids) and N in rosemary leaves were also found. Overall, the results suggest that the terpenoid production's response to fertilization was due to N, which is essential for protein synthesis and terpene synthase activity, and to P, which is necessary for the synthesis of both terpenoid precursors and ATP and NADPH, also needed for terpenoid synthesis. On the other hand, the basis for the fertilization's effects on the production of phenolic compounds is the direct nitrogen trade-off between growth and the shikimic acid pathway by which phenolics compounds are synthesized.
是一种具有重要商业价值的常绿芳香植物，因为它含有多种精油（由萜类化合物组成）和酚类成分（天然抗氧化化合物）。这项工作旨在评估不同无机和有机施肥处理的协同效应，以及随后土壤养分有效性的提高对叶片中萜类化合物和其他碳基次生代谢产物（如黄酮类化合物和酚类化合物）的影响。结果表明，正如预期的那样，施肥植物茎中的结构性碳水化合物含量（木质纤维素化合物）高于对照植物。此外，还观察到叶片中总萜类化合物和一些单一萜类化合物的绝对含量与氮或磷含量呈正相关。相反，施肥处理后迷迭香所有植物部位的酚类和黄酮类化合物浓度均较低。事实上，在迷迭香叶中还发现酚类化合物（和黄酮类化合物）与氮之间呈负相关。总体而言，结果表明，萜类化合物产量对施肥的反应归因于氮，氮对蛋白质合成和萜烯合酶活性至关重要，以及磷，磷是萜类化合物前体以及萜类化合物合成所需的ATP和NADPH合成所必需的。另一方面，施肥对酚类化合物产量影响的基础是生长与合成酚类化合物的莽草酸途径之间的直接氮权衡。
