[Effect of freezing of seeds on the morphological characteristics of four pink species].

The effect of non-deep freezing (-10 degrees C) and deep freezing (-196 degrees C) on the morphological characteristics of four pink species was investigated. It was shown that the growth and development of plants after cryopreservation changed insignificantly. Rather stable characteristics (diameter of flower, the number of cauline nodes, and root length) did not change. The length of generative shoots decreased a little, and the character of histograms changed. On the other hand, the changeable characteristics (the number of vegetative shoots and flowers) decreased after seed cryopreservation. However, the number of flowers did not vary in the next year. The parameters essential for seed cryopreservation, seed germination and the quantity of fruits, did not changed. It was also found that seed freezing exerts a stimulating effect on seed germination and the top limit of some parameters, including the quantity of generative organs.