巴西过江藤属（马鞭草科）植物的核型研究
Karyological studies in Brazilian species of Lippia L. (Verbenaceae).
作者信息
Sousa Saulo M, Torres Giovana A, Viccini Lyderson F
机构信息
Departamento de Biologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, MG, Brasil.
出版信息
An Acad Bras Cienc. 2012 Dec;84(4):1029-37. doi: 10.1590/s0001-37652012005000068. Epub 2012 Nov 9.
The genus Lippia (Verbenaceae) comprise around 160 species spread out mainly in South and Central Americas with few African species, some of them with potential medicinal use. Brazil is one the most important centers of diversity with approximately 75% of the species described so far. Innumerous species are endemic and poorly studied especially at a cytological level. Here, chromosomal length, karyomorphology and chromosome asymmetry of twelve Brazilian species of Lippia were evaluated [L. alba (Miller) N.E.Brown, L. diamantinensis Glaz., L. florida Cham., L. hermanioides Cham., L. lacunosa Mart. & Schauer, L. lupulina Cham., L. pohliana Schauer, L. pseudothea (St. Hil) Schauer, L. rosella Moldenke, L. rotundifolia Cham., L. rubella Moldenke and L. sidoides Cham.]. The analysis suggested that the genus has a variable chromosome number (from 2n = 20 to 2n = 56) originated by dysploidy and polyploidy. This is the first description of chromosome morphology for 11 of the 12 Lippia species studied.
过江藤属（马鞭草科）约有160个物种，主要分布在南美洲和中美洲，少数分布在非洲，其中一些具有潜在的药用价值。巴西是最重要的多样性中心之一，迄今为止所描述的物种约有75%分布于此。众多物种为特有种且研究较少，尤其是在细胞学层面。在此，对12种巴西过江藤属植物的染色体长度、核型及染色体不对称性进行了评估[白花过江藤（Miller）N.E.Brown、迪亚曼廷过江藤Glaz.、佛罗里达过江藤Cham.、赫氏过江藤Cham.、多孔过江藤Mart. & Schauer、羽叶过江藤Cham.、波氏过江藤Schauer、假茶过江藤（St. Hil）Schauer、玫瑰过江藤Moldenke、圆叶过江藤Cham.、红过江藤Moldenke和西多过江藤Cham.]。分析表明，该属具有由整倍体变异和多倍体产生的可变染色体数目（从2n = 20到2n = 56）。这是所研究的12种过江藤属植物中11种的染色体形态首次描述。
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