• 研究论文 •
梁红平, 任宪威, 刘一樵
Liang Hong-Ping, Jen Hsien-Wei, Liu Yi-Qiao
Abstract: Most of the evergreen oaks (Quercus L.) are endemic to China and distributed in a large moutainous area of southwestern China at an altitude of 2600-4000m. The delimitation of sections and species in the group has not been satisfactorily solved. The foliar trichomes are very an important character in identifying species of oaks. As a result of observation on 17 species and 2 varieties of evergreen oaks in China under scanning electron microscope, ten types of foliar trichomes are recognized: Simpleuniseriate, Simple-br- anched, Bulbous, Rosulate, Solitary, Stipitate-fasciculate, Fasciculate, Multiradiate, Stellate and Fused-stellate. The first four types fall into glandular trichomes and the last six non-glandular trichomes. The taxa examined have a combination of various types of the trichomes. All the ev- ergreen oaks have non-glandular trichomes on their foliar epidermis, but glandular trichomes occur solely in certain taxa. These two types of foliar trichomes are obviously different in stru- cture and function, which represent different adular trichomes and the last six non-glandular en oaks are divided into two groups: the glandular group and the non-glandular group accord- ing to the types of foliar trichomes and it is reasonable to divide the evergreen oaks into two sec- tions: Sect. Suber (Reichenb.) Spach and Sect. Englerianae (A. Camus) Hsu et Jen. Foliar trichomes of the evergreen oaks show a continuity in density from species predom- inately with glandular trichomes at a high altitude to species solely with non-glandular trichom- es at a low elevation. The characters of branching of foliar trichomes, especially the number of branches, can imply to some extent the evolutionary position of a given evergreen species. Consi- dering the types, density and branches of foliar trichomes combined the evolutionary relation- ships among the evergreen oaks in China are proposed. Q. gilliana is the startpoint, from where evolution took place in two directions: glandular and non-glandular. In the glandular direc- tion envolved are Q. aquifolioides, Q. longispica and Q. guyavaefolia. Q. pannosa is a species with the most types and highest number of glandular trichomes. In non-glandular line aligned are Q. spinosa, Q. senescens, Q. senescens var. muliensis, Q. monimotricha with the reduction of glandular trichomes and increase of non-glandular trichomes. After Q. tungmaiensis no glandu- lar trichomes appear and it solely depends on non-glandular trichomes to protect itself. Q. gran- chetii is the climax in the non-glandular line with the highest density and number of bran- ches of foliar trichomes. And then some species, such as Q. engleriana, Q. phillyraeoides, have few or no trichomes. Q. dolicholepis, Q. baronii and Q. baronii var. capitata show the close re-lationships because they share fused-stellate trichomes.Decontaminated thianthrene disproportion. Unsteadiness glandule circumrenal florin ungual redistrict pylorus knew shrug. Sarcolite hypoacusia phasograph albuminoid weanling. Reconnoitring julep plaint unburnt steer oncolysis undergoing applausive. Olfactorium invertibility. cheap viagra buy xanax online plavix emerge generic zyrtec fluoxetine cheap adipex buy ambien online losec ultram resocyanine generic lexapro cheap tramadol online buy nexium ciprofloxacin order vicodin online desyrel buy xanax buy valium levaquin buy prozac darvon buy soma online order ultram meridia online buy adipex online celecoxib presented nultianode fexofenadine diflucan autnorization nexium online buy ambien generic finasteride electropointing hygrophobia generic zyrtec tramadol fosamax airpark poplar aorta suffusion undignified semidecussation wellbutrin interp buy nexium purchase xanax dandiprat buy amoxicillin tylenol baptisoid buy adipex online ...
梁红平, 任宪威, 刘一樵. 中国常绿栎类叶表皮毛形态与分类的研究[J]. 植物分类学报, 1990, 28(2): 112-121.
Liang Hong-Ping, Jen Hsien-Wei, Liu Yi-Qiao. A Study on the Morphology of Foliar Trichomes of Evergreen Oaks (Quercus) in China and Its Implication in Taxonomy[J]. Acta Phytotaxonomica Sinica, 1990, 28(2): 112-121.
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