Atlantic forest natural soil flora was tested on two leguminous pioneer species Acacia gummifera and Retama monosperma to be used in rehabilitation programs of the coastal sand dunes forest of the Essaouira region. The rhizospheric soil of two endemic plant species: R. monosperma and Juniperus phoenicea was sampled and split into two categories, one from native rhizospheric soil, the other of the sterilized rhizospheric soil. Investigation was focused on mycorrhizal formations, but other forms of beneficial symbiosis such as rhizobia and viable soil microflora were also studied. Growth and nutrition variables assessed included lengths of roots and shoots, number of branches, ratio of root to shoot dry mass and water, nitrogen and phosphorus levels. Results showed important mycorrhizal associations in roots of both plants, presence of nodules and abundance of viable soil microflora. J. phoenicea had a 100% frequency of mycorrhizal formation and an intensity of 80% compared to a frequency of 80% and intensity of 54% for R. monosperma. Nodules had the same density of CFU regardless of the origin. Abundance of viable microflora in rhisospheric soil of R. monosperma, J. phoenicea and the control differed significantly. Among the studied variables for A. gummifera and R. monosperma, nitrogen and phosphorus uptakes significantly wit the use of the nonsterilized rhizospheric soil. Both species doubled their phosphorus uptake when colonized by mycorrhizal species, R. monosperma doubled its nitrogen uptake and A. gummifera increased it by seven times compared with the control. No significant difference was noted for the other variables.

大西洋森林的天然土壤植物区系已在两个豆科先驱物种金合欢和Retama monosperma上进行了测试，用于索维拉地区沿海沙丘森林的恢复计划。两种特有植物物种的根际土壤：单子叶植物和杜鹃红叶菌取样并分为两类，一类来自原生根际土壤，另一类来自灭菌的根际土壤。研究的重点是菌根的形成，但也研究了其他形式的有益共生，如根瘤菌和可行的土壤微生物区系。评估的生长和营养变量包括根和芽的长度，分支数，根与茎干质量和水的比例，氮和磷水平。结果表明，两种植物的根部均具有重要的菌根相关性，根瘤的存在和土壤微生物群落的丰富。凤凰J.菌根形成的频率为100％，强度为80％，而R. monosperma的频率为80％，强度为54％。无论来源如何，结节的CFU密度均相同。单子叶紫菜，凤凰木和对照的根际土壤中活菌群落的丰度存在显着差异。在研究过的A. gummifera和R. monosperma变量中，使用未灭菌的根际土壤会明显吸收氮和磷。与菌根菌种相比，两种菌种的磷吸收量均增加了一倍，单精子藻的氮素吸收量则增加了一倍，而胶粘曲霉的磷吸收量则比对照增加了7倍。其他变量没有显着差异。