SUGARS DYNAMICS PECULIARITIES IN GENERATIVE KIDNEYS OF REMOTE CHERRY HYBRIDS DURING THE DORMANT PERIOD DUE TO THEIR WINTER HARDINESS

Abstract

The purpose of our researches was the study of dynamics of sugars maintenance in generative kidneys of cherry remote hybrids during the dormant period in connection with their winter hardiness. Content of sugars was determined by intensity of coloring of generative kidneys tissues in α-naphthol solution (on a 5-mark scale) from November to March during the period from 2009 to 2016. When assessing the winter hardiness and frost resistance of generative kidneys, the number of live generative kidneys (in percent) was taken into account. The higher resistance to adverse winter period factors during the dormant period for the generative kidneys of the remote triploidny cherry hybrids was revealed at the higher content sugars in them. Peculiarities of sugars dynamics in generative kidneys and their winter hardiness depending on genetic origin of hybrids were established. The valuable for horticulture and breeding hybrid families were revealed.