TY - JOUR T1 - Effects of Different Culture Media Compositions on In Vitro Micropropagation from Paradox Walnut Rootstock Nodes AU - Güler, Begüm AU - Dirlik, Cem AU - Kandemir, Hacer AU - Çetin, Nurberat AU - Şen, Senem AU - Gürel, Aynur PY - 2022 DA - December DO - 10.54287/gujsa.1194822 JF - Gazi University Journal of Science Part A: Engineering and Innovation JO - GU J Sci, Part A PB - Gazi University WT - DergiPark SN - 2147-9542 SP - 500 EP - 515 VL - 9 IS - 4 LA - en AB - The aim of this study is to establish an effective protocol for in vitro micropropagation from node explants of the 'Paradox' (Juglans regia x J. hindsii) rootstock. In the first stage of the study, the node explants were cultured in semi-solid media after being exposed to different sterilization methods. The most effective sterilization method was observed as ST2 with the lowest darkening rate (4 %). According to the results, SP4 medium provided the highest number of shoots per unit explant (1.05 shoots/explant) and 100 % shoot formation, SP2 medium provided the best mean shoot length (1.6 cm) and the mean number of nodes per unit explant (7.95 nodes/explant). Best root induction was provided from ½ Modified MS medium containing 4 mg/L IBA with 30 g/L sucrose. For root induction explants were retained under dark conditions for 7 days at 24±2oC. In order to ensure root formation and elongation, shoot explants with root induction cultured in a 16-hour photoperiod (3500 lux) for 21 days in different nutrient media containing 2.4 mg/L Gelrite, hormone-free and mixed with vermiculite (1:1 v/v) and was rooting rate is 45.45 % in ¼DFe medium. KW - Micropropagation KW - Walnut KW - Juglans regia L. KW - Paradox KW - In vitro CR - Açıksöz, U. (2020). Bandırma İlçesindeki Ceviz Fidanı Üretiminin Mevcut Durumunun İncelenmesi. MSc Thesis, Bursa Uludağ University. CR - Aslansoy, B. (2012). 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