Tolerance of the cabernet franc variety population to low temperatures in controlled conditions

Abstract

We tested the influence of low temperatures up to the freezing point during winter rest of winter central buds and lateral buds in variances of the Cabernet franc variety. Variances were grown in equal agro-ecological conditions. We applied in vitro the method of artificial freezing of one-year shoots (cuttings) in the cold storage. Two low temperatures were applied:-150C, -200C and -250C. Tests were performed simultaneously on all variances three times during the winter rest of 25th December, of 25th January and of 25th February (of 1998,1999 and 2000). On the basis of results of the testing, we determined that there were statistically significant differences between the tested variances and low temperatures applied. Damage of central winter buds and lateral buds were significantly less on -200C than on -250C.

U radu je ispitivan uticaj niskih temperatura tokom zimskog mirovanja na stepen izmrzavanja zimskih okaca i suočicaa kod varijeteta sorte kaberne fran. Ispitivani varijeteti su gajeni u istim agrekološkim uslovima na O.Š.D. "Radmilovac" - Vinča, Poljoprivrednog fakulteta u Zemunu. Primenjena je in vitro metoda veštačkog izmrzavanja reznica jednogodišnjeg lastara u hladnoj komori. Testiranja su izvođena istovremeno kod svih varijeteta, tri puta u toku zime. Primenjene su tri niske temperature i to - 150C, -200C i -250C. Testiranja su izvođena 25. decembra, 25. januara i 25. februara 1998.,1999. i 2000. godine. Na osnovu rezultata ispitivanja, ustanovljeno je da postoje statistički značajne razlike između ispitivanih varijeteta i primenjenih niskih temperatura. Oštećenja okaca i suočica bila su značajno niža na -200C nego na -250C.