Study of Chromosome number in wetland plants

Wetlands are hollows of lowland areas that are formed as a result of moisture accumulation and play a very important role in biodiversity of species richness, especially medicinal and forage species. Cytogenetics of wetland plants is one of the tools for recognizing the effect of ecological factors and adaptation of plants to changing environmental and climatic conditions. Because cytogenetic study of populations in different regions can show changes in ploidy level and its relationship or lack of relationship with ecological factors. In this survey, metaphases plates of ten populations of sex species were perpetrated from tip of root by squash method and using an Olympus microscope (BX۴۱ Olympus supplemented Digital color video camera) at a magnification of about ۲۰۰۰x. The Results showed that in populations we have three basic chromosome numbers (X=۶,۷ & ۹), Lilium arundinaceum, Ononis spinose, Trifolium pratence, with ۲n=۱۴, Plantago lanceolate with ۲n=۱۲, and Arctium lappa, with ۲n=۱۸ are diploid and Dactylis glomerata with ۲n=۱۴ and ۲۸ is mixaploid(diploid and tetraploid).

Keywords:

Cytogenetics , Diploid , Tetraploid , Chromosome