Picralima nitida is an important African medicinal plant species threatened in the Dahomey Gap. It is used in pharmaceutical industries and traditional medicine to treat several diseases. Despite its importance, this the species faces a serious conservation problem. It is rare, especially in the Dahomey Gap countries in contrast to the Guinean zone. The present study aims to contribute to the conservation of P. nitida by assessing the ecophenotypic variation of the fruit, natural seed germination and seedling growth. A total of 1,200 fruits were collected in two phytodistricts of Dahomey Gap to evaluate the morphotypes. The seeds were evaluated for natural germination with different substrates. The results on ecophenotypic variation and natural seed germination revealed no significant difference (p > 0.05) between the fruits from the two phytodistricts. However, three morphotypes of fruits were obtained with significant difference (p < 0.05). Morphotype 1 gathered large, round and heavy fruits, morphotype 2 fruits were elongated oval-shaped, and morphotype 3 fruits were short, round and light. The highest germination rate (73.33%) was obtained with morphotype 1 seeds on the substrate composed of 100% top soil. The fruits from the phytodistrict of Pobè had seeds with the highest rate of germination (55.55%) on the substrate composed of 100% top soil. The use of organic matter in the substrate of germination stimulated the growth of P. nitida seedlings after seed germination.

中文翻译：

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水果的生态表型变异、自然种子萌发和达荷美峡谷黑角螟幼苗生长：对保护和价值化的意义

Picralima nitida 是一种重要的非洲药用植物物种，在达荷美峡谷受到威胁。它用于制药工业和传统医学以治疗多种疾病。尽管它很重要，但该物种面临着严重的保护问题。这种情况很少见，尤其是在与几内亚地区形成鲜明对比的达荷美峡谷国家。本研究旨在通过评估果实的生态表型变异、自然种子发芽和幼苗生长，为 P. nitida 的保护做出贡献。在 Dahomey Gap 的两个植物区中收集了总共 1,200 个水果以评估形态型。用不同的基质评价种子的自然发芽。生态表型变异和种子自然发芽的结果显示没有显着差异（p > 0。05) 在两个植物区的果实之间。然而，获得的果实的三种形态类型具有显着差异（p < 0.05）。形态1果实大、圆、重，形态2果实长椭圆形，形态3果实短、圆、轻。在由 100% 表土组成的基质上的形态 1 种子获得最高的发芽率 (73.33%)。Pobè 植物区的果实在由 100% 表层土壤组成的基质上具有最高的发芽率 (55.55%)。在发芽基质中使用有机物刺激了种子发芽后P. nitida幼苗的生长。形态2果实呈拉长椭圆形，形态3果实短、圆、轻。在由 100% 表土组成的基质上的形态 1 种子获得最高的发芽率 (73.33%)。Pobè 植物区的果实在由 100% 表层土壤组成的基质上具有最高的发芽率 (55.55%)。在发芽基质中使用有机物刺激了种子发芽后P. nitida幼苗的生长。形态2果实呈拉长椭圆形，形态3果实短、圆、轻。在由 100% 表土组成的基质上的形态 1 种子获得最高的发芽率 (73.33%)。Pobè 植物区的果实在由 100% 表层土壤组成的基质上具有最高的发芽率 (55.55%)。在发芽基质中使用有机物刺激了种子发芽后P. nitida幼苗的生长。