A STUDY ON THE RELATION OF COLD ACCLIMATION AND HARDINESS TO MINERAL NUTRITIONAL AND BIOCHEMICAL FLUCTUATIONS OF THREE AGRICULTURAL FORMS OF BRASSICA OLERACEA L.

Abstract

The relation of cold acclimation and hardiness with total RNA and DNA, free amino acid nitrogen and soluble protein in various plants has long been known. In this study, this relation has been investigated on non-dormant cabbage. The agricultural aim of our study is to establish the hardy cabbage cultivar, to evaluate the biochemical parameters to be used in improvement studies and to obtain the yield in winter with the applications to inc- rease the hardiness. The effect of cold on three agricultural forras of white head cabbage has been investi­ gated in different development stages. For this purpose, they were planted in different seasons and sampled during seedling and headed phases. While three cultivars planted in June froze, those planted in October did not freeze, chilled onIy. The increases of total RNA and DNA contents during the cold acclimation and har­ diness have been accepted as related with this fact. The increases of total RNA and DNA contents in the headed samples of cultivars are related to cold acclimation and hardiness. Except for the chilled samples of one cultivar, there is a relationship with the content of total RNA in the chilled samples of two cultivars. There is no relationship with the content of total DNA in the chilled samples of seedlings of three cultivars. It has been found out that the changes of free amino acid content showed differences in the cultivars. As for in the headed cultivar, the increase in the free amino acid content is related to cold acclimation and hardiness stages being different than the other cultivars. The free amino acid nitrogen has decreased in the samples of chilled seedlings of the cultivars.

Keywords

• COLD ACCLIMATION
• HARDINESS TO MINERAL
• BIOCHEMICAL FLUCTUATIONS

References

1. Ankara Üniversitesi – Communications Faculty of Sciences University of Ankara Series C Biology Dergisi