Promena hemijskog sastava korena kao rani indikator rizomanije šećerne repe

The aim of investigation was monitoring of change of chemical composition of sugar beet root juice in dependence of presence, that is the absence of rhizomania, as well as the intensity of the occurrence this disease in tolerant and susceptible sugar beet hybrids because of establishing of early indicators of this disease occurrence in fields of Agriculture Corporation 'Belgrade'. Considering to the specificity of production area of PKB and to the different claims about some changes of root components in plants with rhizomania, and what is connected as well as with the soil and climatic conditions in which the investigations were done, it is necessary a permanent monitoring of chemical composition of root juice because of the confirmation and monitoring of the spread of this severe sugar beet disease. On the basis of chemical analysis of sugar beet root we can conclude that increased content of sodium followed by the decrease of sugar content in sugar beet root can serve as an early indicator of occurrence of this disease. Only sodium content increase, that is decrease of sugar content in sugar beet root are not reliable indicators the occurrence or the intensity of rhizomania onset regarding the great influence of sugar beet genotype and agro-ecologic conditions in which beet is growing. .Cilj istraživanja bio je praćenje izmena hemijskog sastava soka korena šećerne repe u zavisnosti od prisustva odnosno odsustva rizomanije, kao i intenziteta pojave ove bolesti kod tolerantnih i osetljivih hibrida šećerne repe radi utvrđivanja ranih pokazatelja pojave ove bolesti na poljima Poljoprivredne korporacije 'Beograd'. S obzirom na specifičnost proizvodnog područja PKB i ne podudaranja tvrdnji o pojedinim promenama sastojaka korena kod obolelih biljaka od rizomanije, a što je povezano kako sa ispitivanim genotipovima šećerne repe i patogena, tako i sa zemljišnim i klimatskim uslovima u kojima su ispitivanja izvršena, neophodno je stalno praćenje hemijskog sastava soka korena radi potvrđivanja i praćenja širenja ove opake bolesti šećerne repe. Na osnovu hemijskih analiza soka korena šećerne repe možemo zaključiti da povećan sadržaj natrijuma praćen smanjenjem sadržaja šećera u korenu šećerne repe može poslužiti kao rani indikator pojave ove bolesti. Samo povećanje sadržaja natrijuma, odnosno smanjenje sadržaja šećera u korenu šećerne repe nisu sigurni pokazatelji pojave ili intenziteta napada rizomanije s obzirom na veliki uticaj genotipa šećerne repe i agroekoloških prilika u kojima repa raste