Karyology of Some Coastal and Water Plants from Far East (Russia)

Abstract

Cytogenetic studies on four species of vascular coastal and water plants from Russian Far East are presented. During the present investigation the next chromosome numbers have been revealed: Gypsophila pacifica (2 n = 34), Allium sacculiferum (2 n = 32), Mertensia maritima (2 n = 24), and Nelumbo komarovii (2 n = 16). Unusual chromosome numbers for these species have not been noted but it was the first case of karyological studies of Nelumbo komarovii from the Jewish Autonomous Region and most northern habitat. The number of nucleoli in interphase nuclei of these species was counted. Interphase nuclei of studied species contain 1–4 nucleoli except in A. sacculiferum so far which have 1–2 nucleoli per cell. Different points of view on polyploidy of studied species are discussed.

Karyological Analysis of Introduced <i>Stevia rebaudiana</i> Bertoni (Asteraceae) in Moderate Climate

“…In most cases, plants introduced into other regions lose their genetic stability and acquire a high level of polyploidy and aneuploidy (Mandák et al 2003, Malakhova et al 2008. High polyploid cytotypes of some species show better variability and adaptiveness to extreme conditions while grown in the condition of introduction along the borders of its natural range (Shang and Su 1985, Ekimova et al 2012, Khrolenko et al 2021. The karyological analysis could be used as evidence of genetic stability or variability of plants cultivated in the condition of introduction.…”