tailieunhanh - Nutlet structures of subsection Fragiles of the genus Stachys (Lamiaceae) from Turkey and their systematic applications

This paper includes the morphological and anatomical characters of the nutlets of 7 endemic species of the subsection Fragiles of the genus Stachys (Lamiaceae) from Turkey and the systematic significance of these characteristics, using one-way analysis of variance and cluster and principal component analyses. Morphological characters such as the dimensions, shapes, colors, and surfaces of the nutlets were studied using light and scanning electron microscopes. The structures and thicknesses of the pericarp and endosperm layers, as well as the sizes of the cotyledon in the nutlets, were anatomically studied. The outcomes revealed that the taxa vary from each other in terms of nutlet shape and color. | Turkish Journal of Botany Turk J Bot 2019 43 659-672 http botany TÜBİTAK Research Article doi bot-1812-31 Nutlet structures of subsection Fragiles of the genus Stachys Lamiaceae from Turkey and their systematic applications 1 2 Mehmet Cengiz KARAİSMAİLOĞLU Özal GÜNER 1 Department of Biology Faculty of Arts and Sciences Siirt University Siirt Turkey 2 Department of Biology Faculty of Science Gazi University Ankara Turkey Received Accepted Published Online Final Version Abstract This paper includes the morphological and anatomical characters of the nutlets of 7 endemic species of the subsection Fragiles of the genus Stachys Lamiaceae from Turkey and the systematic significance of these characteristics using one-way analysis of variance and cluster and principal component analyses. Morphological characters such as the dimensions shapes colors and surfaces of the nutlets were studied using light and scanning electron microscopes. The structures and thicknesses of the pericarp and endosperm layers as well as the sizes of the cotyledon in the nutlets were anatomically studied. The outcomes revealed that the taxa vary from each other in terms of nutlet shape and color. The nutlet dimensions range from mm to mm in length and from mm to mm in width. While Stachys longiflora and S. pseudopinardii have the largest nutlets S. chasmosericea has the smallest. The nutlet surface ornamentation was recorded as 5 types reticulate scalariform reticulate-foveate ruminate and rugose. The most common type is reticulate however the other ornamentation types are specific for the studied taxa. Anatomically the structure and thickness of the pericarp parts and the endosperm and the size of the cotyledon are very important characteristics that disclose interspecific relations within the studied taxa. A key is presented for the identification of the examined taxa based on the nutlet properties. Key words .