Chromosome banding and essential oils composition of Brazilian accessions of Lippia alba (Verbenaceae)
| Autor: | Pâmela S. Silva, Lyderson Facio Viccini, Saulo M. Sousa, Giovana Augusta Torres |
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| Rok vydání: | 2009 |
| Předmět: |
Chemotype
biology Heterochromatin Verbenaceae Karyotype Cell Biology Plant Science biology.organism_classification Biochemistry law.invention chemistry.chemical_compound Linalool chemistry law Botany Genetics Constitutive heterochromatin Animal Science and Zoology Molecular Biology Ecology Evolution Behavior and Systematics Essential oil Lippia alba |
| Zdroj: | Biologia. 64:711-715 |
| ISSN: | 1336-9563 0006-3088 |
| DOI: | 10.2478/s11756-009-0066-y |
| Popis: | The essential oil components and a karyotypic analysis of five Lippia alba (Verbenaceae) accessions from Brazil were performed with the objective of investigating the variation among different populations. The chemistry analysis allowed the grouping of the accessions in two main chemotypes: neral chemotype (LaCat, LaJF and LaRJ) and linalool chemotype (LaGua and LaVC). However, large karyotypic differences, verified by different chromosome banding techniques, were not detected. The results presented the same chromosome number for all accessions (2n = 30) with 10 metacentric chromosomes and 5 submetacentric. The chromosome banding showed great blocks of constitutive heterochromatin (C-bands) around the centromeric region, which was rich in AT bases (DAPI+), while the CMA bands were observed only in terminal regions of six chromosomes. Through Ag-NOR techniques, only two active pairs of NORs were detected on the three pairs of secondary constrictions (the NOR activity is discussed). This work relates the pattern of heterochromatin for Lippia alba for the first time. |
| Databáze: | OpenAIRE |
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