Dissertation
Dissertation > Biological Sciences > Botany > The plant taxonomy (system botany ) > Seed plants ( flowering plants, have embryos plant ) > Have possession of the embryo plant door > Angiosperms Asian door > Dicotyledon > Rose Head > Leguminous

Systematics of Glycyrrhiza L. (Fabaceae)

Author MengLei
Tutor WangWenCai;ZhuXiangYun
School Institute of Botany
Course Botany
Keywords Glycyrrhiza False Glycyrrhiza Leguminous Palynology Molecular Systematics Taxonomic revision
CLC Q949.751.9
Type PhD thesis
Year 2005
Downloads 506
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Glycyrrhiza (Glycyrrhiza L.) belongs to Leguminosae Papilionoideae Galega family Licorice subfamily are distributed on all continents. The case of licorice comprehensive system studies, focusing on analysis of the various forms of related traits variation patterns and variation range, first discovered the keel Glycyrrhiza unhygienic separation, China Flora Forty-two volumes recorded keel, Hopson error; pod shape and leaf traits are more reliable minute basis, traits of lobular number of inflorescence sparse, dense, and flower size also has important taxonomic significance for the division of its kind. The first time in the scanning electron microscope, micro-morphological characteristics of 13 kinds of licorice species of pollen grains found Glycyrrhiza plant pollen is spherical or near spherical tricolporate germination communication is often relatively wide ditch jagged obvious ditch film surface usually has warty, nodular or granular protrusions; the exine sculpture small cavity surface ornamentation, as well as wrinkles like ornamentation. Pollen shape, size, exine sculpture in interspecific variability reflects the relationship between certain kinds, provide some evidence of current under the classification system. The seed morphology observed that close to the seed coat surface ornamentation characteristic of this genus, in addition to round Glycyrrhiza (G. squamulosa) surface ornamentation of the dome-like protrusions outside the rest of the species are striped or a paper-like protrusions Lord. Interspecific relationships reflect from the the testa surface ornamentation characteristic view is consistent with the classification results, some inconsistencies, no rules can be found, the Glycyrrhiza classification and evolution of interspecific relationship does not have a higher value. Molecular phylogenetic analysis of Glycyrrhiza plants determined ITS sequences of Glycyrrhiza plants, 21 kinds of the ITS sequences downloaded from Genbank, including two kinds of Glycyrrhiza plant and Galega family of 10 other representatives of the genus . As outgroup to Wisteria parsimony analysis, to build the Glycyrrhiza adjacent groups phylogenetic tree, results showed that licorice species studied clade Galega family and others were in the system tree clustered into another branch, show that the relationship between the remaining taxa within the licorice genus Galega family of relatively little far; the licorice species as a monophyletic group got 100% support. In including Galega family clover family, broad bean family, chickpeas family, of Hedysarum family and gray leaves family of plant systems development tree, licorice species Galega family in the remaining groups in the different sub- branches, further evidence that they are distantly related, including the Galega family Glycyrrhiza not a monophyletic group, the Glycyrrhiza classification position requires further study. Authors studied more than 4,000 herbarium and a large number of field studies conducted on the basis of combined evidence of palynology, seed morphology and molecular biology, the first integrated resort world licorice genus comprehensive taxonomic revision . Confirm Glycyrrhiza containing three groups, 13 kinds, a variant of which deal with a new combination; merge 17 name; redefinition of widely distributed species Siniora licorice (G. uralensis) and licorice (G. glabra) the range of variation, to clarify the confusion in the name of the real long-term existence of these two; textual study of the genus

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