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Study on Taxonomy and Resources of Paris L. in Guangxi

Author: YeXiaoXia
Tutor: LiuYan
School: Guangxi Normal University
Course: Ecology
Keywords: The genus Guangxi Quantitative Classification Taxonomy Resources
CLC: Q949
Type: Master's thesis
Year: 2010
Downloads: 250
Quote: 1
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Abstract

The genus (Paris L.) belongs to the Trilliaceae (Trilliaceae), according to Li Heng classification system, the world's 26 species, distributed in tropical and temperate regions of the Eurasian continent. China is the case of the main distribution area of ??plants and diverse center, 20 species, 12 varieties, 2 variants, in particular, the most abundant species and resources of the southwest region. This genus factor leaves a monocots the veins mesh, the majority of the carpel, flower base of more than 4 dicots have in common, is of great significance in the study of angiosperm phylogeny. In addition, heavy floor is a long history of medicinal medicinal plants, detoxification, swelling and pain and other effects for the treatment of sore throat, snake bites and other symptoms. In this paper, Leaf Epidermis observation and numerical taxonomy method, a preliminary study of the genus classification of Guangxi and Guangxi, the genus resources to investigate and study. The main results are as follows: 1. Guangxi 9 species of the genus Leaves Epidermis found nine species of the genus of leaf epidermal micro-morphological characteristics more common, and the difference is very small. In: all kinds of upper epidermis and lower epidermis cells are irregularly shaped pores swells, there are no rules stomata, these traits the genus is a natural taxa. Especially in the lower epidermis vertical peripheral wall wavy or sinuate, cell staghorn branches to the radial staghorn branches, pore size and stomatal index characteristic indicators there is a clear continuity, these features can be reflected to some extent the genus the genetic relationship between the different plants, but not the significance of his division under the division can not be used as auxiliary traits. Guangxi nine species of the genus select 36 Characteristics and Quantitative classification of explore the relationship between the various groups. By cluster analysis, Guangxi nine species of the genus is divided into four characteristics characterization group. The polyphylla and its variants independence as a group more reasonable. At the same time, there are questions the traditional polyphylla spend processing variants polyphylla view. Principal component analysis, the first five principal components contribute to the cumulative rate of 98.861%, the main taxonomic characters of the genus, in which the stamens rounds, long petals / sepals, anther type, petal type traits are re-building genus mainly Sort. In addition, the number of sepals and petals number having a larger correlation, an important contribution to the classification. Thus, the number of applications classification method to solve the genus within the genus and species classification significance. In view of the group select only nine species and 36 characteristic traits, therefore, according to these traits encoded clustering tree chart only reflects the Guangxi produced by the genus relationship between plant populations, so this is a Category the classification is still poorly studied. Species specimen collection re-building sorting, identification, and field survey to confirm the Guangxi Zhuang Autonomous Region has the genus species (including 4 variants). Morphological characteristics of each group, habitat description and prepared based on the system evolutionary relationships of the Guangxi the genus minutes to retrieve the table. Gun re-building population distribution in Cenwanglaoshan National Nature Reserve were studied. Comprehensive analysis shows that: heavy floor in Cenwanglaoshan protected areas, forest areas, Lingyun Joy was born in humidity, light intensity is weak, acidic soil, rich in organic matter; average population density of about 0.085 / m2 the kinds of habitat degradation, small population size, sexual reproduction is very weak, they do not take effective measures to protect the species to the brink of extinction. 5 is a geographical distribution of Guangxi heavy floor: 9 species of the genus are mainly distributed in western Guangxi and northern Guangxi region. This shows that most of the Guangxi the genus the narrow domain distribution of species, rare in typical karst limestone Rock Hill, the genus distribution. Vertical distribution pattern: concentrated at an altitude of 700-1300m evergreen broad-leaved forest, with the altitude decreased or increased, this genus species richness showed a decreasing trend. Longitude distribution pattern: this genus are mainly distributed in the east longitude 104 ° 29'-110 ° 04 'increments distribution trends, from south to north, the species richness. Guangxi heavy floor genus Resources: Guangxi Paridis the lack Plant Resources, in addition to a wider distribution area polyphylla polyphylla in the region, and the remaining species is critically endangered or endangered status. Found in the survey, the mankind its habitat destruction and Luancailuanwa behavior, exacerbated by the reduction in the amount of wild resources. Resource protection and sustainable use of reasonable suggestions: strict control of the amount of wild-type plants mining; protect the genus ecological environment, to reduce concentrated human activities; vigorously carry out the cultivation and tissue culture work; included in the IUCN Red List.

Study on Taxonomy and Resources of Paris L. in Guangxi

Abstract

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