Mangrove plants (focally, Avicennia marina) are resources rich in bioactive substances, and they are considered as promising agents in various biological activities. Phytochemical analyses of the roots and leaves of Avicennia marina collected from the coast of Jeddah, Saudi Arabia, showed different proportions of various parameters which generally recorded higher values in root samples than those analyzed in leaf samples. The total phenolics in raw plant were 19.7% for roots and 9.5% for the leaf samples. In addition, the total flavonoids of roots and leaves samples in raw plant were rather closed to each other and appeared as 8.8% and 10.9%, respectively. In particular, the total phenolics and the total flavonoids in crude extracts of roots exhibited considerable higher values (394.8 and 175.9 mg/L, respectively) than that of leaves (190.8 and 21.7 mg/L, respectively). Both the root and leaves of A. marina showed promising antioxidant activity and thus are very promising agents. Additionally, the results revealed that both crude extracts had effective activities. The most affected bacterial pathogen was Klebsiella pneumoniae which was inhibited by leaves crud extract (24 mm), while Enterococcus faecalis was the lowest inhibited bacterium by the two crudes tested (12 mm). On the other hand, the GC–MS results of methanol extract from the roots and leaves of A. marina showed the presence of several bioactive components, with totally 28 and 26 major compounds, respectively, especially fatty acids and their derivatives, which are famous as antioxidant and antibacterial agents.

红树林植物（主要是Avicennia marina）是富含生物活性物质的资源，在各种生物活动中被认为是有前途的药物。Avicennia marina的根和叶的植物化学分析从沙特阿拉伯吉达海岸收集的数据显示各种参数的比例不同，这些参数通常在根样品中记录的值高于在叶样品中分析的值。生根中的总酚含量为：根部为19.7％，叶样品为9.5％。此外，生植物中的根和叶样品中的总黄酮彼此相当封闭，分别为8.8％和10.9％。特别是，根的粗提物中的总酚和总类黄酮显示出比叶（分别为190.8和21.7 mg / L）更高的值（分别为394.8和175.9 mg / L）。A. marina的根和叶表现出有希望的抗氧化剂活性，因此是非常有前途的试剂。另外，结果表明两种粗提取物均具有有效的活性。受影响最严重的细菌病原体是肺炎克雷伯菌，它被叶粗提取物抑制（24毫米），而粪肠球菌是受测试的两种原油中抑制程度最低的细菌（12毫米）。另一方面，从滨海假种的根和叶中提取甲醇的GC-MS结果表明，存在几种生物活性成分，分别有28种和26种主要化合物，尤其是脂肪酸及其衍生物。作为抗氧化剂和抗菌剂。