Some peculiarities of Taraxacum officinale seeds maturation on the conditions of different level of pollution

V. Gryshko1, I. Silich2

1 Kryvyi Rih Botanical Garden, NAS of Ukraine
50, Marshak St., Kryvyi Rih 50089, Ukraine
2 Kryvyi Rih Teachers’ Training College “Kryviy Rih National University”
54, Gagarin Ave., Kryvyi Rih 50086, Ukraine

Compiled and analyzed data from stationary atmospheric pollution sources on the conditions of Kryvyi Rih, with predominance in composition industrial emissions of extrass of enterprises of mining-metallurgical complex for the period 2009–2013 and influence on weight, length and width of seeds Òaraxacum officinale Wigg. It was found that pollution leads to running specific adaptation mechanisms to ensure the functioning of plants in adverse conditions exist. Thus, the following peculiarities of formation of seed Taraxacum officinale Wigg with a significant level of pollution: 42–52% of germination reduction and 13–25% of weight decrease, which are accompanied by the reduction of seeds sizes (either length or width, or at least one of these indices). At the same time the seeds gathered in the monitoring regions with insignificant pollution level had some morphometric changes, however its similarity didn’t differ from conditional verification. We consider it necessary to further study and more Taraxacum officinale Wigg. urban areas to determine the parameters that are most associated with the level of total pollution of air and the change which can be created appropriate rating scales for ecological monitoring of the environment and systems of bioindication.

Keywords: pollution, Òaraxacum officinale Wigg, morphometric indices, similarity, seeds

Full text (PDF)