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The Taxonomy and Biogeography Study of Alectoria, Oropogon and Sulcaria Lichens in Hengduan Moutains of China

Author: ZhuMinFeng
Tutor: LuXianMing；WangLiSong
School: Chengdu University of Traditional Chinese Medicine
Course: Pharmacognosy
Keywords: Lichens Shufa genus Zhuanbaofashu Caozhiyishu Parmelia Branch Hengduan Mountains Biogeographic New record
CLC: Q948
Type: Master's thesis
Year: 2011
Downloads: 53
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Abstract

Hengduan Mountains region southwest China, including Northwest, western and southeastern region of Tibet, is Asia's richest lichen diversity in one of the regions. In recent years, domestic and lichen study reveals lichen species in this region unique, rich and diverse features. Because of its special and complex dendritic structure, tree hair lichen group (Alectorioides lichen) has attracted extensive research attention, mainly by tree hair genus (Alectoria Ach.), A small genus Alternaria hair (Bryoria Brodo D.Hawksw.), Brick genus Alternaria hair (Oropogon Th.Fr.), intends felt clothes are (proposed new) (Pseudephebe M. Choisy) and slot sticks clothing genus (Sulcaria Bystr.) This five taxonomically belongs Parmelia Branch (Parmeliaceae ) lichen composition. Which made the tree genera, genera and groove brick hair sticks spore coat is, is China's Hengduan Mountains alpine wet environments dominant genera, but there is still a lack of information on these three complete system of classification and geographical distribution. Based on the CAS Kunming Institute of Botany Herbarium (KUN) collections lichen specimens, through the specimen view, and access to books and literature, using the classical method of classification, supplemented by the color reaction and thin layer chromatography (TLC) and other chemical means, the author found in Hengduan Mountain region Shufa genus Alternaria hair metal and brick slot branch lichen genus clothing specimens were collected distribution information collation, morphological descriptions and species identification, the main findings are as follows: Tree hair is all over the world There are eight kinds of reports and a subspecies of the Asian four kinds, China 2 kinds, Hengduan Mountain Region reported only golden tree made (Alectoria ochroleuca) 1 种. Tree hair is similar in appearance Usnea (Usnea (Hill.) Wigg.), But there is no Usnea possessions anatomy clothing cartilaginous type axis, was identified, the 16 collections made territorial clothing tree Specimens are one kind, that golden tree hair, it carried out a detailed description of the classification and found that the species is a new record in Tibet, together with the relevant photomicrographs and geographic distribution. Brick genus Alternaria hair reported worldwide total of 36 species, including eight kinds of Asian, Chinese seven kinds, five kinds of Hengduan Mountains. Hair lichen genus Alternaria brick complex morphological similarity, only from the start of macro or microscopic anatomical features are described for different species can easily cause confusion, so be supplemented by chemical means to achieve an accurate identification of species. With chemical methods for collection of 224 tiles KUN genus Alternaria hair specimens identification results show that the distribution of the Hengduan Mountains region there are six kinds, in addition to the five already reported, the first recorded brick spore hair (Oropogon loxensis) distribution in Tibet. Attached to these six species related photomicrographs and geographic distribution. In addition, there are 25 specimens suspected O. barbaticus, in view of the kind currently in China has not yet been reported, to be from the morphology, chemistry and molecular biology further confirmation. Slot sticks clothes are reported worldwide total of three kinds, Asia, two kinds, two variants and a variant, except bearded variant (Sulcariasulcata var. Barbata) outside (distributed only to see Taiwan), the rest are distributed in the Hengduan Mountains region. In the process of identification of specimens found yellow tank sticks clothing variant (S. sulcata f. Vulpinoides) in Sichuan for the new record; also variants of green silk tank sticks Freund (S. virens var. Forrestii) merged into green silk tank sticks (S. virens). Right slot sticks, clothing, sticks and yellow green silk tank tank sticks clothing variants for a detailed description of the classification features, together with the relevant photomicrographs and geographic distribution. With the development of molecular techniques and systems theory research, the morphology of lichens, chemical research and genotyping combined lichen has increasingly become the major trend of taxonomic research. Because fungal licheniformis complex external morphology, many morphological features and a variety of physiological and biochemical changes as the environment changes. During this process of taxonomic studies, different researchers very easy to put in the same kind of performance under different growth conditions was identified as a different species, and the corresponding evolution of its taxonomic status and relationships are often a result of instability create ambiguity or confusion. Moreover, the current domestic and international groups for tree hair lichen molecular studies, has not been reported, therefore, this paper based on the classical taxonomy, and then the Hengduan Mountains Shufa research group Molecular identification of lichens, molecular studies give some objective evidence can avoid certain biological phenomena of convergence illusion, reducing human subjective factors. Through the Hengduan Mountains Shufa genera, genera and groove brick spore hair sticks are three possessions clothing clothing and biogeographical classification exhaustive research, these three genera morphology, chemical and geographical distribution of lichens were discussed and revised. For further study lays the foundation for the rational development of lichen resources, protection and management to provide a scientific basis.

The Taxonomy and Biogeography Study of Alectoria, Oropogon and Sulcaria Lichens in Hengduan Moutains of China

Abstract

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