METHOD OF EVALUATION OF WINTER HARDINESS OF FRUIT PLANTS Russian patent published in 2014 - IPC A01G7/00 A01H1/04 G01N21/64 

FIELD: agriculture.

SUBSTANCE: method relates to the field of agriculture, in particular fruit growing and selection. The method comprises the freezing of annual shoots in the dormant period in the environmental chamber. At that the evaluation of damaged shoots is carried out not visually but according to the size of the maximum quantum efficiency of photochemical reactions of the photosystem II and the relative velocity of the electron transport by the photosystem II in the cambium tissue and buds, which are determined by the microbial cell adsorption reaction fluorometer. The minimum level of fluorescence and changes in this index under the action of actinic light with density of 190 mcmol/(m²s) are recorded, and after exposure to the object of high intensity light pulse (10 000 mcmol/(m²s), 450 nm).

EFFECT: method enables to accelerate the evaluation of damage of fruit plants with frost.

2 tbl, 2 ex