Uticaj virusa mrljavosti lista maline na plodove maline sorte 'Willamette'

Abstract

Uticaj virusa mrljavosti lista maline na plodove maline sorte 'Willamette' REZIME Virus mrljavosti lista maline (raspberry leaf blotch emaravirus, RLBV) je prisutan u velikom broju zasada maline u Srbiji i najrasprostranjeniji je virus maline u zemlji. Cilj ovog rada je bio ispitivanje uticaja RLBV na plodove maline sorte 'Willamette'. Ogledi su sprovedeni u četiri zasada maline u lokalitetima zapadne Srbije. Analizirani su plodovi sa RLBV zaraženih i nezaraženih izdanaka: dužina, širina i visina ploda, indeks oblika ploda, težina ploda, sadržaj rastvorljive suve materije, pH vrednost voćnog soka, titraciona kiselost, ukupni šećeri, sadržaj ukupnih fenola i antocijana. Rezultati istraživanja su pokazali da je virus mrljavosti lista maline imao značajan uticaj na smanjenje veličine i težine (9,15-27,49%) ploda maline. Sadržaj rastvorljive suve materije je bio viši kod zaraženih plodova (1,55-7,39%), ali ovo povećanje nije bilo od statističkog značaja. RLBV nije imao uticaj na titracionu kiselost voćnog soka, pH vrednost i sadržaj ukupnih šećera. Sadržaj ukupnih fenola i antocijana je bio viši kod plodova sa zaraženih izdanaka u dva od četiri ispitivana lokaliteta.

Raspberry leaf blotch emaravirus (RLBV) has become established in many Serbian raspberry orchards as the most prevalent virus of raspberries in the country. The aim of this study was to evaluate the impact of RLBV on the red raspberry 'Willamette' variety. A trial was conducted in four raspberry orchards located in Western Serbia. Fruits from RLBV-infected and uninfected canes were analyzed for fruit size (fruit length, width, height, shape, and weight), soluble solids content, pH, titratable acidity, total sugars, and total phenolic and anthocyanin contents. The results of the study confirmed that RLBV significantly decreases fruit size and weight (9.15-27.49%) of 'Willamette' fruits. Soluble solids content was higher in infected fruits (1.55-7.39%), but the increase was not significant. RLBV did not cause significant changes in titratable acidity of raspberry juice, pH or total sugars content. Total phenolic and anthocyanin contents were higher in fruits of RLBV-infected plants in two out of four locations.