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Study on Taxonomy of the Genus Schisandra Michaux

Author: YangZhiRong
Tutor: ZhaoJianCheng;LinQi
School: Hebei Normal
Course: Botany
Keywords: Genus Schisandra Seed morphology Leaf surface morphology Cladistic Classification
CLC: Q949
Type: Master's thesis
Year: 2003
Downloads: 298
Quote: 3
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Abstract


Experimental study of classical plant taxonomy based on the combination of seed morphology and leaf epidermis, reference plant morphology, plant anatomy, plant embryology, palynology, plant cells taxonomy, plant chemistry and molecular phylogenetics other aspects of the data of the previous Schisandra is a classification system for amendments and additions. Access or borrow nearly 2,000 specimens (including the holotype), described the traits characteristic of each species, phenology, ecological habits and their relationship with the closely related species, to determine the polarity of the traits of 17 domestic and foreign herbaria, controversial species morphological traits for detailed measurement and comparison for quantitative research, analysis of the main external morphological traits variation patterns of variation range of the value of the delineation species range scatterplot of individual traits. Optical microscopy and scanning electron microscopy the the Genus Schisandra whole seed morphological characteristics of 96 samples of 10 species. The results show that: the macroscopic morphology of the genus seeds render smooth, fine wrinkles or tumor-like protrusions, and that the Genus Schisandra seed morphology may have the species skin surface morphology from smooth to fine wrinkles to the tumor-like processes of evolution trends; is divided into the verrucose type (eg: large flower Schisandra Schisandra, Schisandra East Asia, stenophylla Schisandra hairy leaves Schisandra, wing stems Schisandra and dichroism Schisandra) and reticulate (such as: the cramp casual and plena taste child). In combination with other traits, to think the reticulate represent two plants should create side-by-side with other plants in the genus classification unit. Schisandra species in seed morphological characteristics, there are some differences, for the case of the following, and provide the basis for the classification above species. Schisandra 30 samples are seven kinds of leaf epidermis characteristics were observed under an optical microscope. The results show that: the upper and lower epidermis of the leaves of these plants cells were irregular or polygonal, anticlinal walls are straight, arched or wavy, periclinal walls occasional ridge stripes; the epidermis there stomatal few types or secretory cells table under all types of leather stomatal apparatus, and secretory cells; the stomatal type paracytic type and side column type mostly, occasionally whether the rule type; stomatal polar regions was slightly the horny thickening or rod-like thickening, rare T-shaped thickening. Finishing Schisandra species research added to collect information and I Institute recently published data from the species on this study, The choose the allied Kadsura (Kadsura) as an outgroup PAUP4.0b4a software on traits data analysis branch reconstruction of phylogenetic Genus Schisandra, as amended and supplemented Schisandra is a classification system, 2 subgenera in Schisandra its set, Group 3, 2 Department of 10.

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CLC: > Biological Sciences > Botany > The plant taxonomy (system botany )
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