Taxonomic study on Malvaceae Juss. sensu lato
Zeinab Mohamed Ibrahim Ahmed;
Abstract
The present study was carried out in the Taxonomic Unit Lab (TUL) of Botany Department, Faculty of Science, Ain Shams University.
In the present work, the morphological, anatomical and palynological characteristics on 39 taxa of Malvaceae s.l. (includes: Malvaceae s.s., Bombacaceae, Sterculiaceae, and Tiliaceae) as well as Eleocarpus angustifolius as outgroup were examined using both light microscope (LM) and scanning electron microscope (SEM). The studied taxa represent 24 genera; some of them wild while the majority are cultivated. The taxa were collected from different localities in Egypt, then identified. The aim of the present study is to evaluate the use of morphological, anatomical and palynological characters in analyzing the phylogenetic relationships among these taxa, through the parsimony analysis using upgraded WinClada and TNT cladistic programes. The specimens are examined and the morhphological characters of the whole plant are listed. Also, the different anatomical characters of the stem, petiole and leaf are collected in cumulative tables with the palynological characters, then analyzed using WinClada and TNT cladistic programes. Photos were taken using digital camera (Nikon coolpix p600) (60x) and presented in cumulative plates.
The output of this study can be summarized as follows:
1. Morphological characteristics:
The morphological results revealed that, certain synapomophic characters has great taxonomic value which can be diagnostic and used for taxa delimitation and evaluating the phylogenetic relationships between the studied taxa. The most important characters are:
• Most of Malvaceae taxa shrubs, subshrubs and herbs, only Lagunaria patersonii is tree, while other families of Bombacaceae and Sterculiaceae are trees, except Dombeya in a shrubby appearance.
• Leaves composition are either simple - lobed in all studied taxa except family Bombacaceae and Sterculiaceae, the leaves are compound digitated.
• The leaves are stipulate in most of Malvaceae taxa, while the other families show different types - absent. In Brachychiton spp., leaves with pulvinate base.
• Domatia characteristic to the outgroup only while absent in the other studied taxa.
SUMMARY
In the present work, the morphological, anatomical and palynological characteristics on 39 taxa of Malvaceae s.l. (includes: Malvaceae s.s., Bombacaceae, Sterculiaceae, and Tiliaceae) as well as Eleocarpus angustifolius as outgroup were examined using both light microscope (LM) and scanning electron microscope (SEM). The studied taxa represent 24 genera; some of them wild while the majority are cultivated. The taxa were collected from different localities in Egypt, then identified. The aim of the present study is to evaluate the use of morphological, anatomical and palynological characters in analyzing the phylogenetic relationships among these taxa, through the parsimony analysis using upgraded WinClada and TNT cladistic programes. The specimens are examined and the morhphological characters of the whole plant are listed. Also, the different anatomical characters of the stem, petiole and leaf are collected in cumulative tables with the palynological characters, then analyzed using WinClada and TNT cladistic programes. Photos were taken using digital camera (Nikon coolpix p600) (60x) and presented in cumulative plates.
The output of this study can be summarized as follows:
1. Morphological characteristics:
The morphological results revealed that, certain synapomophic characters has great taxonomic value which can be diagnostic and used for taxa delimitation and evaluating the phylogenetic relationships between the studied taxa. The most important characters are:
• Most of Malvaceae taxa shrubs, subshrubs and herbs, only Lagunaria patersonii is tree, while other families of Bombacaceae and Sterculiaceae are trees, except Dombeya in a shrubby appearance.
• Leaves composition are either simple - lobed in all studied taxa except family Bombacaceae and Sterculiaceae, the leaves are compound digitated.
• The leaves are stipulate in most of Malvaceae taxa, while the other families show different types - absent. In Brachychiton spp., leaves with pulvinate base.
• Domatia characteristic to the outgroup only while absent in the other studied taxa.
SUMMARY
Other data
| Title | Taxonomic study on Malvaceae Juss. sensu lato | Authors | Zeinab Mohamed Ibrahim Ahmed | Issue Date | 2018 |
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