Abstract
We investigated the seed testa sculpture of twenty-four species belonging to thirteen sections and five subgenera of Allium from the herbarium materials or collected from plants in living collections. Seed testa sculpture of 21 species were described for the first time in this study. According to our results, the straight anticlinal wall and one large verruca or dense granules periclinal wall were found among the species in subgenus Amerallium, Cepa, Polyprason and Reticulatobulbosa. Only A. ochroleucum (sect. Daghestanica, subg. Polyprason) has U-type undulation anticlinal wall, which is similar to species of subg. Allium. The U- to Omega-type undulation anticlinal walls and several big verrucae with marginal verrucae periclinal wall were found in subg. Allium. Our results suggest that seed testa sculpture is important character of species and sections level of the genus Allium.
Highlights
Seed morphology and seed testa studies have been suggested to be taxonomically useful for species and section rank detection in the genus Allium
The U, Omega- and S-type undulation anticlinal walls and convex periclinal walls with several large verrucae or marginal verrucae were dominated in subg
We investigated seed testa sculpture of 24 species in genus Allium L. based on herbarium materials and seed collected in the living Allium collections in Institute of Plant Genetics and Crop Plant Research, Gatersleben, Germany and Botanical Garden of the Osnabrueck University, Germany (GAT and OSN accessions in the table 1, respectively)
Summary
Seed morphology and seed testa studies have been suggested to be taxonomically useful for species and section rank detection in the genus Allium. Seed testa sculpture of anticlinal wall with S-, U-, Omega-, and straight type undulation and one central verruca with marginal verrucae or densely granulose periclinal wall are important characters to sections and subgenera level (Baasanmunkh et al, 2020). Straight anticlinal walls were dominated in subg. Reticulatobulbosa and Polyprason and the periclinal walls were distinguished by central big verruca and dense granules. The U-, Omega- and S-type undulation anticlinal walls and convex periclinal walls with several large verrucae or marginal verrucae were dominated in subg. Several new taxa of Allium have been recognized based on their morphology including seed macroand micro-morphological characteristics and phylogenetic studies (Deniz et al, 2015; Duman et al, 2017)
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