Seed surface morphology in some representatives of the Genus Rhodiola sect. Rhodiola (Crassulaceae) in the Russian Far East |
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| Authors: | Svetlana B Gontcharova Andrey A Gontcharov Valentin V Yakubov Katsuhiko Kondo |
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| Institution: | 1. Botanical Garden-Institute FEB RAS, Makovskogo str., 142, 690024 Vladivostok, Russian Federation;2. Institute of Biology and Soil Science FEB RAS, pr. 100-letia Vladivostoka, 159, 690022 Vladivostok, Russian Federation;3. Laboratory of Plant Chromosome and Gene Stock, Hiroshima University, Higashihiroshima 7398526, Japan |
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| Abstract: | The seed coat morphology and anatomy of Rhodiola angusta, Rh. alsia, Rh. integrifolia, Rh. ishidae, R. rosea subsp. arctica, Rh. rosea subsp. rosea and Rh. rosea subsp. sachalinensis were examined comparatively using scanning and light microscopy methods in order to evaluate their characteristics for use in systematic studies. Based on the features of the arrangement of cells and cell outline, three morphological types of seed coats were identified – laticostate (Rh. rosea subsp. rosea), tenuicostate (Rh. integrifolia, Rh. rosea subsp. rosea R. rosea subsp. arctica and Rh. rosea subsp. sachalinensis) and colliculate (Rh. alsia, Rh. angusta, Rh. ishidae). Exotesta sculpture features are stable across a range of habitats in all taxa except Rh. rosea subsp. rosea. Considerable variability of seed coat morphology is reported in the latter species and its possible implication for species taxonomy is discussed. |
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