FIELD: organic chemistry, agriculture. SUBSTANCE: invention describes the composition used for plant cells protection from temperature decrease. The composition has derivatives of hydroxamic acid of the formula (I) where R1 and R2 mean C1-C5-alkyl group; R1 and R2 in common with nitrogen atom to which they are bound form piperidine ring; R3 is pyridinyl group; Y is hydroxyl group; X is halogen atom; R forms chemical bond with B; A is the group:
where R4 is hydrogen atom; R5 is hydrogen atom; m = 0; n = 0 or its acidic additive salts formed by physiologically acceptable acids in mixture with one or more conventional solid or liquid filling agents. EFFECT: enhanced resistance to cold of cultures. 4 cl, 4 tbl, 3 ex
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Authors
Dates
2002-03-20—Published
1996-12-20—Filed