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Scanning electron microscopic screening of 20 medicinally important Asteroideae taxa.
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2020-05-05 , DOI: 10.1002/jemt.23492
Sidra Younis 1 , Shabnum Shaheen 1 , Mah Zaib 1 , Nidaa Harun 1 , Sana Khalid 1 , Khadim Hussain 2 , Uzma Hanif 3 , Farah Khan 1
Affiliation  

In the present study anatomical characterization of 20 medicinally important Asteroideae species were done under light and scanning electron microscopy. Variety of qualitative and quantitative anatomical characters like epidermal cells, stomata, guard cells, subsidiary cells, trichomes and oil droplets were observed. Generally pentagonal, polygonal, irregular or hexagonal, smooth, undulating thick walled epidermal cells were observed in studied species. In abaxial surface Thymophylla tenuiloba L. possessed the largest length of epidermal cell that is, 221.6 (156.6–286.6) μm whereas Bellis perenis L. showed the smallest length that is, 46.4 (32.6–60.2) μm. Average width of epidermal cells ranged from 57 (22–92) μm to 169 (127.9–210.1) μm. Cosmos sulphureus Cav. had smallest width while Thymophylla tenuiloba L. had the largest width. In adaxial surface Artemisia absinthium L. possessed the largest length of epidermal cell that is, 269 (165.1–372.9) μm whereas Bellis perenis L. showed the smallest length that is, 61.4 (42.6–80.2) μm. Average width of epidermal cells ranged from 50.8 (32.6–69) μm to 260 (116–202) μm. Thymophylla tenuiloba L. had smallest width while Dahlia pinnata Cav. had the largest width. Among stomatal characters anisocytic, anomocytic, and diacytic stomata were observed in selected species of Asteroideae. Nonglandular uniserate, multicellular, unbranched pointed tips with bulbous base trichomes were reported in some Asteroideae members while some possessed glandular, capitates mushroom like multicellular trichomes covered with tubercle papicles. Rounded, oval, triangular shaped oil droplets were observed in some species. It is concluded that qualitative and qualitative anatomical variations in trichomes, stomata and epidermal cells are of good taxonomic value for the Asteroideae species.

中文翻译:

扫描电子显微镜筛选20种具有医学意义的小行星类群。

在本研究中,在光学和扫描电子显微镜下对20种具有医学意义的小行星物种进行了解剖学表征。观察到各种定性和定量解剖特征,如表皮细胞,气孔,保卫细胞,辅助细胞,毛状体和油滴。在所研究的物种中,通常观察到五边形,多边形,不规则或六边形,光滑,起伏的壁厚表皮细胞。在背面,百里香百里香具有最大的表皮细胞长度,为221.6(156.6–286.6)μm,而百里香Bellis perenis L.)具有最小的长度,为46.4(32.6–60.2)μm。表皮细胞的平均宽度范围为57(22–92)μm至169(127.9–210.1)μm。硫磺波斯菊腔 宽度最小,而百里香百里香具有最大宽度。在近地表艾蒿具有最大的表皮细胞长度,即269(165.1–372.9)μm,而百里香Bellis perenis L.)具有最小的长度,即61.4(42.6–80.2)μm。表皮细胞的平均宽度范围为50.8(32.6–69)μm至260(116–202)μm。百里香(Thymophylla tenuiloba L.)的宽度最小,而大丽花(Pahata)腔 具有最大的宽度。在气孔特征中,在选定的小行星物种中观察到异气孔,单核孔和双酰基气孔。在小行星的一些成员中报告有非球状的无性的,多细胞的,无分支的尖的尖端,具鳞茎基毛状体,而有些则具有腺状,头状的蘑菇,如被结节状丘疹覆盖的多细胞的毛状体。在某些物种中观察到圆形,椭圆形,三角形的油滴。结论是,毛状体,气孔和表皮细胞的定性和定性解剖变化对于小行星物种具有良好的分类学价值。
更新日期:2020-05-05
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