Taxonomic Consequences of Seed Morphology and Anatomy in Three Lupinus Species (Fabaceae-Genisteae) | ||
| Catrina: The International Journal of Environmental Sciences | ||
| Article 1, Volume 1, Issue 2, 2018, Pages 1-8 PDF (627.2 K) | ||
| Document Type: Original Article | ||
| Author | ||
| Ream Marzouk* | ||
| Botany and Microbiology Department, Faculty of Science, Alexandria University, Alexandria, Egypt | ||
| Abstract | ||
| The objective of this paper is to study seed coat morphological and anatomical features of three Lupinus species; L. albus L., L. digitatus Forssk. and L. angustifolius L., in order to reveal the taxonomic relationships among them. Among seed coat macromorphological characters used were seed dimensions, seed weight and testa color, while those of the hilum were lens and macula raphalis. Seed coat micromorphological features revealed a similarity between L. digitatus and L. angustifolius since the outer periclinal walls of the isodiametric epidermal cells are tuberculate. The summit of each tubercle takes the form of umbrella with a central elevation in the former species, while each tubercle possesses long and narrow tips in the latter one. However, in L. albus the outer periclinal walls of the isodiametric epidermal cells are combination between pusticulate and reticulate. The anatomy of seed coat of Lupinus species shows that it is formed of two layers, the exotesta and the mesotesta. The exotesta is distinguished into two sublayers; the outer epidermis which is formed of malpighian cellulosic thickwalled cells (macrosclereids) and the inner hypodermis of hourglass thick-walled cells with large intercellular spaces (osteosclereids). On the other hand the mesotesta layer is formed of parenchyma cells. L. angustifolius, L. digitatus and L. albus displayed the same intermediate cotyledon type with some specification for L. albus. | ||
| Keywords | ||
| Cotyledon anatomy; Fabaceae; Lupinus albus; Lupinus digitatus; Lupinus angustifolius; seed macromorphology; seed coat; seed coat micromorphology | ||
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