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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Water-Deficit Impact on Fatty Acid and Essential Oil Composition and Antioxidant Activities of Cumin (Cuminum cyminum L.) Aerial Parts
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Water-Deficit Impact on Fatty Acid and Essential Oil Composition and Antioxidant Activities of Cumin (Cuminum cyminum L.) Aerial Parts

机译：水分亏缺对小茴香（Cuminum cyminum L.）空中零件的脂肪酸和精油成分及抗氧化活性的影响

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摘要

This study is designed to examine the effect of water deficit on growth, fatty acid and essential oil composition, and antioxidant activities of Cuminum cyminum aerial part extracts. Plants were treated with different levels of water deficit: control (C), moderate water deficit (MWD), and severe water deficit (SWD). Plant growth (height, fresh and dry matter weights) as well as yield components were significantly increased under moderate water deficit and conversely reduced at severe level. Total fatty acid content decreased significantly with severity of constraint. Drought reduced considerably the proportions of major fatty acids and the unsaturated to saturated fatty acid ratio. The essential oil yield was 0.14% (based on the dry weight); it increased by 2.21-fold at MWD but decreased by 42.8% under SWD in comparison to the control. Drought results in the modification of the essential oil chemotype from 1-phenyl-1-butanol to 1-phenyl-1,2-ethanediol. Antioxidant activities of the acetone extracts were determined by two complementary test systems, namely, DPPH and β-carotene/linoleic acid. The highest activity was exhibited by moderately stressed plants and was reduced significantly under SWD. In control plants, the total phenolic amount was 10.23 mg GAE/g DW, which increased by 1.5-fold under MWD and decreased by 42% under SWD.
机译：这项研究旨在研究水分不足对小球茎地上部分提取物的生长，脂肪酸和精油成分以及抗氧化活性的影响。用不同水平的水分亏缺处理植物：对照（C），中等水分亏缺（MWD）和严重水分亏缺（SWD）。在中度缺水的情况下，植物的生长（身高，鲜重和干物质的重量）以及产量构成要素显着增加，而在严重水平下则相反。总脂肪酸含量随着限制的严重性而显着降低。干旱显着降低了主要脂肪酸的比例以及不饱和脂肪酸与饱和脂肪酸的比例。精油产率为0.14％（基于干重）;与对照相比，MWD时它增加了2.21倍，而SWD下它下降了42.8％。干旱导致精油化学型从1-苯基-1-丁醇变为1-苯基-1,2-乙二醇。丙酮提取物的抗氧化活性由两个互补的测试系统测定，即DPPH和β-胡萝卜素/亚油酸。中度胁迫的植物表现出最高的活性，在SWD下显着降低。在对照植物中，总酚量为10.23 mg GAE / g DW，在MWD下增加了1.5倍，在SWD下减少了42％。

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