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首页> 外文期刊>Acta Horticulturae >Inhibition of renin-angiotensin system enzymes by leafy vegetables polyphenol extracts related to fertilizer micro-dosing and harvest time
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Inhibition of renin-angiotensin system enzymes by leafy vegetables polyphenol extracts related to fertilizer micro-dosing and harvest time

机译：通过植物蔬菜多酚提取物抑制肾素 - 血管紧张素系统酶与肥料微量给药和收获时间相关的植物蔬菜多酚提取物

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摘要

Increase in human population coupled with continuous rise in oxidative stress-related diseases requires availability of healthier foods like vegetables, which are polyphenol-rich sources. Polyphenols are able to inhibit angiotensin-I converting enzyme(ACE) and renin, thereby regulating blood pressure but this ability can be influenced by nutrient management during plant growth. Fertilizer micro-dosing is a valuable nutrient management option, which increases crop productivity with minimal expenditure of resources. This study assessed the effects of fertilizer micro-dosing and harvest times on inhibition of ACE and renin activities by aqueous polyphenol extracts from Amaranthus cruentus, Ocimum gratissimum and Solanum macrocarpon leaves. Different levels of urea (0, 20, 40 and 60 kg ha1) with cow manure (5 t ha1) or without manure (80 kg ha1) were used to grow the leafy vegetables before they were harvested three times at two [A. cruentus) and four weeks intervals (O. gratissimum and S. macrocarpon). Polyphenols were extracted from leaf powders using water (1:20 ratio) and total phenolic content (TPC), total flavonoids content (TFC), ACE and renin inhibition were assayed according to standard protocols. Two-way analysis of variance and Duncan's test (p<0.05) revealed that TPC (605.70±39.51 to 1024.83±102.89 mg g-i; gallic acid equivalent) and TFC (149.02±29.12 to 276.19±63.30 mg g1; rutin equivalent) were not affected by fertilizer doses and harvest times except TPC from O. gratissimum. Inhibitions of ACE (0.25±0.01 to 8.46±0.42 mg mL1) and renin (-95.41±2.25 to 36.42±0.22%) activities by each specie were significantly affected by fertilizer dose and harvest time. Production with cow manure combined with low or medium doses of urea (20 or 40 kg ha1) followed by collection at the first two harvests are recommended for polyphenol extracts with potential inhibition of renin-angiotensin system enzymes.
机译：人口增加与氧化应激相关疾病的持续上升相结合，需要蔬菜等更健康的食物，这是富含多酚的来源。多酚能够抑制血管紧张素-I转化酶（ACE）和肾素，从而调节血压，但这种能力可能受植物生长过程中营养管理的影响。肥料微量剂量是一种有价值的营养管理选择，可随着资源开支最小的产量生产力。本研究评估了肥料微量剂量和收获时间对Amaranthus Cruentus水性多酚萃取物的抑制作用对ACE和肾素活性的影响，为苋菜植物，最大的涂料率和茄蛋白宏观叶片叶。用牛粪（5吨Ha1）或没有粪肥（80kg Ha1）的不同水平的尿素（0,20,40和60kg Ha1）用于在两个[A. Cruentus）和四周间隔（O. Gratissimum和S. Macrocarpon）。使用水（1:20比率）从叶粉中萃取多酚，并根据标准方案测定总酚含量（TPC），总黄酮含量（TFC），ACE和肾素抑制。双向分析方差和邓肯的测试（P <0.05）显示TPC（605.70±39.51至1024.83±102.89mg GI; Gallic酸等同物）和TFC（149.02±29.12至276.19±63.30 mg g1;芦丁等价物）不是受肥料剂量和收获时间的影响，除了O. GraTissimum的TPC。每种物种的ACE抑制（0.25±0.01至8.46±0.42mg mL1）和肾素（-95.41±2.25至36.42±0.22％）受肥料剂量和收获时间的显着影响。用牛粪的生产与低或中剂量的尿素（20或40kg HA1）相结合，然后在前两次收获中收集，用于多酚提取物，具有潜在抑制肾素 - 血管紧张素系统酶。

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