Escola Nacional de Botânica Tropical, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil.
Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil.
PeerJ. 2022 Sep 8;10:e13975. doi: 10.7717/peerj.13975. eCollection 2022.
The present ontogenetic study reveals variations throughout floral development in three morphologically representative species from the genus , allowing a better understanding of floral organs diversity, flower symmetry and their homologies, especially in Fabaceae, a diverse family that exhibits a wide variation in floral architecture. (Caesalpinioideae) corresponds to an important Neotropical legumes tree genus with 58 species in Brazil. Species of the genus Vogel were incorporated in its circumscription, increasing the diversity of its floral morphology.
This work aims to perform an ontogenetic study of , and , morphologically representative species of , in order to describe the floral development and to better comprehend the floral morphology varieties among the species, using scanning electron microscopy.
We found the studied species to have floral buds with acropetal and helical development along the inflorescence axis; sepals and petals with helical development, varying the position of the primordia in the bud, according to the different species; stamens with unilateral development and carpel with adaxial curvature. These data correspond to original records of ontogeny and contribute to an improved understanding of floral morphology and symmetry with data related to the zygomorphic and early development of the sepals and petals.
本个体发生研究揭示了三个形态代表种在花发育过程中的变化，使我们能够更好地理解花器官的多样性、花对称性及其同源性，特别是在豆科，这是一个具有广泛花结构变异的多样化科。（含羞草亚科）对应于一个重要的新热带豆科树属，在巴西有 58 个种。属的物种 Vogel 被纳入其范围，增加了其花形态的多样性。
本工作旨在对 、 和 这三个形态代表种进行个体发生研究，以描述花的发育，并使用扫描电子显微镜更好地理解种间花形态的多样性。
我们发现所研究的物种的花蕾具有沿花序轴的向顶和螺旋发育；萼片和花瓣具有螺旋发育，根据不同的物种，原基在芽中的位置发生变化；雄蕊具有单侧发育，心皮具有腹面弯曲。这些数据对应于 个体发生的原始记录，并有助于更好地理解花形态和对称性，同时提供与对称花和萼片及花瓣早期发育相关的数据。
