Abstract
The structure of the fetus, seed, embryo of 3 species of ephemerals of the genus Alyssum, collected in the southwestern Kyzylkum, is described. Fetus of the Alyssum species is rounded, wide-pated silicle, with fetus stems of a truncated-conical (A. dasycarpum) shape. Pericarp is 4 - 5 layered. The fetus is seedless (2 - 4), and the seeds are protein-free, with a large embryo. At the general plan of a structure, species have diagnostic signs distinguishing them on the form of a fetus, weight of seeds, the structure of embryo mesophyll.
Highlights
Fetus of the Alyssum species is rounded, wide-pated silicle, with fetus stems of a truncated-conical (A. dasycarpum) shape
At the general plan of a structure, species have diagnostic signs distinguishing them on the form of a fetus, weight of seeds, the structure of embryo mesophyll
Due to wide distribution of Alyssum species, the morphology of fetuses studied for a long time and from different perspectives
Summary
Due to wide distribution of Alyssum species, the morphology of fetuses studied for a long time and from different perspectives. Alyavdina [1] studied the fetus for more than 100 species of Brassicaceae (including Alyssum) in terms of taxonomy and phylogeny of the taxon. The author noted the same structure of spermoderm, consisting of 5 (rarely 6 - 7) layers, with a significant variety of their capacity and scleritis. The adaptive role of myxospermia and its complete absence in non-opening fetus are emphasized
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