Effects of multiple stressors exposures on plant populations
© Aristotle University of Thessaloniki (6/2009)
The results of long-term field studies in the Bryansk region of Russia affected by the Chernobyl accident, and in the Semipalatinsk Test Site, Kazakhstan are discussed. Findings obtained clearly indicate that chronic low dose exposure appears to be an ecological factor creating preconditions for possible changes in the genetic structure of a population. Plant populations growing in areas with relatively low levels of pollution are characterized by the increased level of both cytogenetic disturbances and genetic diversity. Under conditions of chronic exposure in pine tree populations were developed seed descendants with significantly lower reproductive ability than in the reference population.