Rodríguez-Lorenzo José Luis, Martín-Gómez José Javier, Tocino Ángel, Juan Ana, Janoušek Bohuslav, Cervantes Emilio
Plant Developmental Genetics, Institute of Biophysics v.v.i, Academy of Sciences of the Czech Republic, Královopolská 135, 612 65 Brno, Czech Republic.
Instituto de Recursos Naturales y Agrobiología del Consejo Superior de Investigaciones Científicas (IRNASA-CSIC), Cordel de Merinas, 40, 37008 Salamanca, Spain.
Plants (Basel). 2022 Mar 31;11(7):958. doi: 10.3390/plants11070958.
The description of shape in seeds is based on adjectives coined by naturalists in the 19th century. The expressions reniform, dorso plana, and dorso canaliculata were applied in reference to lateral or dorsal views of seeds, but the characters described can be submitted now to an analytical description by quantitative methods, allowing shape quantification and the comparison between species or populations. A quantitative morphological analysis is based on the comparison with geometric models that adjust to the shape of seeds. Morphological analysis of the dorsal view of seeds based on geometric models is applied here to 26 seed populations belonging to 12 species. According to their dorsal views, the seeds are classified as convex and non-convex. New geometric models are presented for both types, including figures such as super-ellipses and modified ellipses. The values of index (percent of similarity of a seed image with the model) are obtained in representative seed samples from diverse populations and species. The quantitative description of seed shape based on the comparison with geometric models allows the study of variation in shape between species and in populations, as well as the identification of seeds in species. The method is of application to other plant species.
种子形状的描述基于19世纪博物学家创造的形容词。肾形、背平、背沟状等表述用于描述种子的侧面或背面视图，但现在所描述的特征可以通过定量方法进行分析描述，从而实现形状量化以及物种或种群之间的比较。定量形态分析基于与适应种子形状的几何模型的比较。基于几何模型对种子背面视图进行的形态分析在此应用于属于12个物种的26个种子种群。根据种子的背面视图，将其分为凸形和非凸形。针对这两种类型都提出了新的几何模型，包括超椭圆和修正椭圆等图形。在来自不同种群和物种的代表性种子样本中获得指数值（种子图像与模型的相似百分比）。基于与几何模型比较的种子形状定量描述有助于研究物种之间以及种群内形状的变化，以及物种内种子的鉴定。该方法适用于其他植物物种。
