Oliveira Marta, João Rodrigues Maria, Neng Nuno R, Nogueira José Manuel Florêncio, Bessa Rui J B, Custódio Luísa
Centre of Marine Sciences, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal.
Centro de Química Estrutural, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.
Plants (Basel). 2021 Mar 16;10(3):556. doi: 10.3390/plants10030556.
In our endeavor to identify salt-tolerant plants with potential veterinary uses in ruminants' production strategies, we focused on L. Pohl (sawgrass), due to its high total phenolic and tannin content, anti-radical properties, and ethnomedicinal uses. Aerial parts were collected along the year in Southern Portugal and evaluated for the nutritional profile and in vitro organic matter digestibility (IVOMD), aiming for its use as feed. Acetone extracts were appraised for total contents in phenolics (TPC), flavonoids (TFC), and tannins (CTC), as well as the chemical composition by HPLC-DAD and in vitro antioxidant and anti-inflammatory properties, targeting its exploitation as phytotherapeutic products. Sawgrass biomass has a limited nutritive value, due to its high neutral detergent fiber (NDF; 596-690 g kg dry matter (DM)) and acid detergent fiber (ADF; 330-418 g kg DM) contents, low crude protein (51.8-87.3 g kg DM) and IVOMD (172-317 g kg organic matter (OM)). Despite differences among seasons, the mineral profile was adequate. The extracts were rich in TPC (88-112 mg g), CTC (115-169 mg g), and TFC (18.5-20.2 mg g), and displayed significant antioxidant capacity, particularly in summer and autumn, whilst no seasonal influence was detected for anti-inflammatory properties (30% reduction of nitric oxide production). Eleven phenolics were quantified: chlorogenic, ferulic, and syringic acids were the most abundant, especially in the autumn sample. Overall, despite the low nutritional interest, sawgrass extracts hold the potential as a source of antioxidant and anti-inflammatory phenolic compounds.
在我们致力于识别可用于反刍动物生产策略且具有潜在兽医用途的耐盐植物的过程中，我们聚焦于锯齿草，因其总酚和单宁含量高、具有抗自由基特性以及民族药用价值。在葡萄牙南部全年采集其地上部分，并对其营养成分和体外有机物消化率（IVOMD）进行评估，旨在将其用作饲料。对丙酮提取物的酚类（TPC）、黄酮类（TFC）和单宁类（CTC）总含量，以及通过高效液相色谱 - 二极管阵列检测器（HPLC - DAD）分析的化学成分和体外抗氧化及抗炎特性进行了评估，目标是将其开发为植物治疗产品。锯齿草生物质的营养价值有限，因其中性洗涤纤维（NDF；596 - 690 g/kg干物质（DM））和酸性洗涤纤维（ADF；330 - 418 g/kg DM）含量高，粗蛋白含量低（51.8 - 87.3 g/kg DM）且IVOMD低（172 - 317 g/kg有机物（OM））。尽管不同季节存在差异，但矿物质成分充足。提取物富含TPC（88 - 112 mg/g）、CTC（115 - 169 mg/g）和TFC（18.5 - 20.2 mg/g），并表现出显著的抗氧化能力，尤其是在夏季和秋季，而抗炎特性未检测到季节性影响（一氧化氮生成减少30%）。定量分析了11种酚类物质：绿原酸、阿魏酸和丁香酸含量最高，尤其是在秋季样本中。总体而言，尽管营养价值较低，但锯齿草提取物具有作为抗氧化和抗炎酚类化合物来源的潜力。
