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Alkenes, fatty acids and phenols augment bioactivities of organic crops
Food Bioscience ( IF 5.2 ) Pub Date : 2020-08-19 , DOI: 10.1016/j.fbio.2020.100737
Amara Fatima , Naila Safdar , Benish Moin , Azra Yasmin

Organic and conventional crops of lemon, radish, mint and lettuce, sampled from farms located within ~4 km with similar climatic and soil conditions, were selected for bioactive profiling and functionality measurements. The study showed higher antimicrobial and antioxidant capacity in all organic samples than their conventional counterparts, for example, organic lemon showed an activity index of 2.61 against Pseudomonas geniculata versus Cefixime. Organic radish showed maximum radical scavenging and reducing power activity (75.5 ± 0.1 and 51.1 ± 0.1%), respectively, while conventional lettuce showed the minimum (59.1 ± 0.2 and 14.5 ± 0.1%). The presence of alcohols, alkenes and carboxylic acids as bioactive functional groups in aqueous and methanolic extracts along with significant amounts of alkaloids and tannins (18.0 ± 0.1 mg/g and 25.0 ± 0.03 mg GAE/g dry weight (dw) in radish, respectively) in organic crops showed substantial antimicrobial and antioxidant properties. High-performance liquid chromatography-ultraviolet spectrometry measured increased caffeic acid (1030 μg/mg dw) and rutin (1830 μg/mg dw) in organic radish. The bio-autographic assay showed 4 out of 10 chromatographic isolates with significant (p < 0.05) antimicrobial properties. Moreover, gas chromatography-mass spectrometry showed that 1-hexadecene, 9-octadecene, 9-eicosene, 2,4-bis(1,1-dimethylethyl) phenol, methyl hexadecanoate and 9-octadecenoic acid in lemon and radish was higher in the organic version. Extensive biochemical screening confirmed that organic crops had higher functional food constituents and bioactivities than their conventional counterparts. Polyphenolic profiles and nutraceutical properties also varied showing the impact of the two different agricultural practices.



中文翻译:

烯烃,脂肪酸和酚类可增强有机农作物的生物活性

从大约4公里范围内的气候和土壤条件相似的农场采样的柠檬,萝卜,薄荷和生菜的有机和常规农作物被选择用于生物活性分析和功能测定。该研究表明,所有有机样品中的抗微生物和抗氧化能力均高于常规有机样品,例如,有机柠檬显示出对种假单胞菌的活性指数为2.61与头孢克肟。有机萝卜显示出最大的自由基清除和降低功率活性(分别为75.5±0.1和51.1±0.1%),而常规生菜显示出最小(59.1±0.2和14.5±0.1%)。水和甲醇提取物中存在作为生物活性官能团的醇,烯烃和羧酸,以及萝卜中大量生物碱和丹宁酸(分别为18.0±0.1 mg / g和25.0±0.03 mg GAE / g干重(dw)) )在有机农作物中表现出显着的抗微生物和抗氧化特性。高效液相色谱-紫外光谱法测定了有机萝卜中咖啡酸(1030μg/ mg dw)和芦丁(1830μg/ mg dw)的增加。生物自传分析表明,每10个色谱分离物中就有4个具有显着(p <0.05)抗菌特性。此外,气相色谱-质谱法显示,柠檬和萝卜中的1-十六碳烯,9-十八碳烯,9-二十碳烯,2,4-双(1,1-二甲基乙基)苯酚,十六碳酸甲酯和9-十八碳烯酸含量更高。广泛的生化筛选证实,有机农作物比常规农作物具有更高的功能性食品成分和生物活性。多酚谱和营养保健特性也有所不同,显示了两种不同农业实践的影响。广泛的生化筛选证实,有机农作物比常规农作物具有更高的功能性食品成分和生物活性。多酚谱和营养保健特性也有所不同,显示了两种不同农业实践的影响。广泛的生化筛选证实,有机农作物比常规农作物具有更高的功能性食品成分和生物活性。多酚谱和营养保健特性也有所不同,显示了两种不同农业实践的影响。

更新日期:2020-09-07
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