The impact of oil pollution on coastal vulnerable ecosystems has been a major concern especially, in the Persian Gulf area. The current study was carried out to assess to what extent Avicennia marina can tolerate oil contamination and degrade crude oil polycyclic aromatic hydrocarbons (PAHs) from rhizosphere soil. Seeds of A. marina were grown in control and crude oil-contaminated (2.5, 5.0, 7.5, and 10% w/w) soil under ambient greenhouse conditions. Four-month-old plants were collected, measured for their biometry, and assayed for physiological characteristics in relation to degradation of PAHs. A. marina exposed to petroleum responded by allocating proportionally more biomass to root than shoot, activating enzymatic and non-enzymatic antioxidative mechanisms and removing of PAHs, particularly in lower concentrations of crude oil in the soil. The content of total PAHs in A. marina rhizosphere soil, grown on 2.5, 5.0, 7.5 and 10% oil-treated soils were, respectively, 37 ± 0.4, 21.84 ± 0.27, 12.78 ± 0.11 and 14.74 ± 0.03% lower than non-rhizosphere soil. Comparison of PAHs content of rhizospheric and non-rhizospheric soil also indicated that the highest rate of PAH removal was for acenaphthene (74.63 ± 0.78) in control, fluoranthene (71.18 ± 0.56) in 2.5%, and anthracene (69.45 ± 6.33, 55.66 ± 4.38 and 35.97 ± 0.22) in 5.0, 7.5 and 10% oil-contaminated soil and acenaphthene (74.63 ± 0.78) in control. Activities of peroxidase, ascorbate peroxidase, and polyphenol oxidase were more prominent in the roots of plants exposed to increasing concentrations of oil in soil than control plants. Conversely, the activity of superoxide dismutase decreased. These findings render A. marina as a phytoremediation candidate for small scale oil spills and residual oil pollution in coastal marine environments.

石油污染对沿海脆弱生态系统的影响一直是一个主要问题，特别是在波斯湾地区。当前的研究是为了评估紫茎泽兰在多大程度上可以耐受油污染并降解根际土壤中的原油多环芳烃（PAHs）。在环境温室条件下，在对照和原油污染（2.5、5.0、7.5和10％w / w）的土壤中种植滨海曲霉种子。收集四个月大的植物，对其生物特征进行测量，并分析与PAHs降解有关的生理特征。A.码头暴露于石油下的作物通过向根部分配比例高于茎部的生物量，激活酶促和非酶促的抗氧化机制并去除多环芳烃，特别是在土壤中的原油浓度较低时。滨海曲霉总PAHs含量生长在2.5％，5.0％，7.5％和10％的油处理土壤上的根际土壤分别比非根际土壤低37±0.4、21.84±0.27、12.78±0.11和14.74±0.03％。根际土壤和非根际土壤中PAHs含量的比较还表明，PAH去除率最高的是对照中的ena（74.63±0.78），2.5％的荧蒽（71.18±0.56）和蒽（69.45±6.33，55.66±）。对照中在5.0、7.5和10％的油污染土壤和ena中（4.3.38和35.97±0.22））。与对照植物相比，暴露于土壤中石油含量不断增加的植物根部中，过氧化物酶，抗坏血酸过氧化物酶和多酚氧化酶的活性更为突出。相反，超氧化物歧化酶的活性降低。这些发现使A. marina 作为沿海海洋环境中小规模溢油和残留油污染的植物修复候选者。