New chromosome reports in Lamiaceae of Kashmir (Northwest Himalaya), India
| Autor: | Vijay Singh, Santosh Bala, Santosh Kumari, Raghbir Chand Gupta, Reyaz Ahmad Malik |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Lamiaceae Ploidies biology Cytomixis India Marrubium vulgare Cell Biology Plant Science General Medicine biology.organism_classification 010603 evolutionary biology 01 natural sciences Chromosomes Plant Calamintha Lycopus europaeus Meiosis Species Specificity Genus Nepeta Botany Pollen 010606 plant biology & botany Mentha longifolia |
| Zdroj: | Protoplasma. 254:971-985 |
| ISSN: | 1615-6102 0033-183X |
| DOI: | 10.1007/s00709-016-1006-7 |
| Popis: | Meiotic studies and chromosome data are imperative in order to have an overall germplasm evaluation of a taxon. In the present effort, the meiotic study is carried out in 48 populations belonging to 26 species of Lamiaceae collected from their natural habitats in Kashmir Himalaya, which forms an important part of Northwest Himalaya. Chromosome counts in the five species viz. Dracocephalum nutans (2n = 10), Lycopus europaeus (2n = 22), Marrubium vulgare (2n = 54), Nepeta nervosa (2n = 18) and Salvia sclarea (2n = 22) are first time reported from India. Besides, 17 species are cytologically evaluated for the first time from the study area-Kashmir Himalaya. In Marrubium vulgare, hexaploid cytotype (2n = 6 × =54) is reported for the first time. Also, diploid and tetraploid cytomorphovariants are observed in Calamintha vulgaris (2n = 20, 40), Elsholtzia ciliata (2n = 16, 32) and Mentha longifolia (2n = 20, 40). Various meiotic abnormalities like chromatin stickiness, cytomixis, nonsynchronous disjunction, laggards, chromatin bridges, etc. leading to pollen abnormalities have been documented for the first time in some species. The worldwide status of chromosome number data in each genus is presented. |
| Databáze: | OpenAIRE |
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