Institute Cytology and Genetics

Laboratory of Experimental Mutagenesis

Head V.M.Chekurov, Ph.D.

Effect of "Silk" preparation on disease resistance of tomatoes, cv. Persei (1994 - 1996 )

Influence of "Silk" on fluits marketability and yield

Influence of "Silk" on marketable fruits quality

Two topics have been the continuing research emphasis of the Laboratory.

1. The effect of biologically active substances (BAS) of natural origin on immunity, stress resistance, productivity and the quality of agricultural plant products.

2. Methods for developing highly winter hardy varieties in winter wheat for conditions of Siberia on the basis of BAS.

Topic 1. Two classes of biologically active compounds produced in collaboration with the Institute of Organic Chemistry of the Siberian Branch of the Russian Academy of Sciences are under study: (a) complex gibberellin - containing preparations, called gibbersibs, with different percentage composition of gibberellins differentially affecting the characters of plants, their productivity, and early ripeness; b) preparations that are mixtures of triterpenic acids, cembranes, and other compounds extracted from the evergreen leaves of coniferous plants. Silk and its analogs are representatives of this class. Exposure of plants to this class of preparations increases resistance to phytopathogens, thermal stress, considerably raises the yield and quality of agricultural products. At the Laboratory, current research is focused on intervarietal polymorphism for sensitivity to Silk and its analogs and also on the clarification of the mechanisms underlying their action. The procedures for obtaining these preparations and their application in many crops are protected by authors` certificates and patents.

Topic 2. Highly winter hardy wheat varieties were developed through selection combined with the use of BAS. These varieties winter well in the severe conditions of West and East Siberia. One of the varieties Bagrationovskaya is a standard of Вли ние препарата Силк на поражаемость болезн ми растений томата сорта Персей (1994-1996 гг.)

Influence of "Silk" preparation on disease resistence of tomatoes, cv. Persei (1994-1996) winterhardiness in Russia. In contrast to its spring counterpart, winter wheat has time to form a developed root system to thick out, thereby to overcome the deleterious effects of winter-summer drought in Siberia. Furthermore, winter wheats mature 30-45 days earlier than spring. This makes harvests in favorable dry weather and saving seed of high quality feasible. During the past five years, four varieties of winter wheats have been developed at the Laboratory. The varieties are protected by authors` certificates and patents.