Improvement of rooting and growth in kiwifruit (Actinidia deliciosa) cuttings with organic biostimulants

Seaweed extracts have shown profoundly positive effects on crop growth, quality and reproduction in diverse agricultural horticultural crops. can be used to promote the rooting growth of cuttings perennial fruit species like kiwifruit (Actinidia deliciosa). In this study, were treated with 1, 5, 10 50% solutions G Sap (Gracilaria edulis), K (Kappaphycus alvarezii), AN (Ascophyllum nodosum), EM (Ecklonia maxima), HA (Humic acid) control (water) for 6 h as base dipping. Subsequently, treatments Sap, AN, EM, repeated every 15 days a period six months application 50 ml potted cuttings. All exhibited significant percent all cultivars, namely ‘Monty’, ‘Abott’, ‘Hayward’, ‘Allison’ ‘Bruno’ (P ≤ 0.01) compared control. Shoot root parameters including leaf number per cutting, roots branches, plant height, shoot diameter, length, diameter weight positively increased seaweed 0.05). Cuttings extract significantly higher levels pigments (chlorophyll a, chlorophyll b total carotenoids), metabolites (total carbohydrates soluble phenols) less electrolyte leakage Significant negative correlations observed between biochemical combined nutrient concentration. Principal component analysis (PCA) revealed that PC1 PC2 (first two principal components) accounted 75% entire variation. While, 63% variation, 11% The leaves cultivar ‘Hayward’ at 10%, 10% expression four promoting candidate genes (GH3-3, LBD16, LBD29 LRP1) Therefore, it concluded that, humic acid suitable alternative synthetic hormones