Biostimulants and indolebutyric acid improve rooting of wood cuttings from different grapevine rootstocks

Abstract

The rooting of rootstocks is considered a critical point in the production of high-quality grapevine planting material. To maximize the cutting rhizogenesis process, plant hormones, such as auxins, are used for the development of adventitious roots. In addition, some groups of biostimulant have as their main role the development of root system, ensuring good growth of the plant aerial part. However, research using algae extract-based biostimulants in vegetative propagation of vine rootstocks is scarce. In this sense, the objective of this work was to evaluate the use of the biostimulant based on algae extract and indolebutyric acid (IBA), in the development of the root system and vegetative growth of grapevine rootstocks. The rootstocks evaluated were ‘3309 C’, ‘101-14 Mgt’, ‘Paulsen 1103’, ‘99 R’, ‘110 R’, ‘Kober 5BB’, ‘SO4’, ‘420A Mgt’, ‘Solferino’, ‘Gravesac’, ‘IAC 572’, ‘IAC 766’, ‘IAC 313’, ‘Harmony’, ‘Freedom’, ‘Salt Creek’ and ‘VR 043- 43’. The experimental design was completely randomized with four replications, arranged in a factorial scheme, involving 17 rootstocks associated with four treatments to stimulate rooting (IBA, algae extract, IBA + algae extract and control). The use of indolebutyric acid and algae extract-based biostimulant proved to be efficient in rooting woody cuttings from different vine rootstocks. The use of IBA, algae extract-based biostimulant and IBA combined with algae extract resulted in higher rates of rooting and development than the control. The rootstocks presenting the highest rooting rates and vegetative development were ‘IAC 572’ and ‘Freedom’. ‘Gravesac’, ‘101-14 Mgt’ and ‘99 R’, showing high rates of rooting and root development, but low vegetative development. The rootstocks exhibiting the lowest rooting rates and vegetative development were ‘Salt Creek’, ‘VR 043-43’ and ‘110 R’.

Evaluation of Fig Cutting Rooting to Various Media and Iba Levels

“…This is due to an increase in hormones and carbohydrates in root cells, increased nutrient uptake, increased translocation of metabolites to the growing apices, enhanced callus formation, and differentiation of vascular tissues, it also promotes the differentiation of cambial initials into root primordia, and increases the mobilization of reserve food material to sites of root initiation (Soliman 2024). The same results were recorded by Abuazizah et al, (2023) and Brighenti et al, (2023) on grapes rooting woody cuttings. According to Shagufi and Gurpinder (2018), the appearance of the longest plum shoots on IBA-treated cuttings may be ascribed to the well-developed root system in such cuttings, which enhances nutrient uptake, photoassimilate production, and supplies the essential energy for cell division and elongation.…”

Comprimento e aplicação de ácido indolbutírico no enraizamento de estacas de pitaya (Hylocereus guatemalensis)

“…É importante ressaltar que existem outros fatores que podem influenciar o enraizamento das estacas, como a idade e a condição fisiológica da planta doadora, a escolha do tipo de estaca, as condições ambientais, entre outros (ALMEIDA et al, 2014). , 2007;CARDOSO et al, 2011;MARQUES et al, 2012;ALMEIDA et al, 2014;FONTANELLA et al, 2023). O ácido indolbutírico (AIB) estimula a iniciação radicial promovendo aumento da porcentagem de estacas e a uniformidade do enraizamento, características estas que possibilitam a redução do tempo de permanência das estacas na fase de produção de mudas (DUTRA et al, 2012;ALMEIDA et al, 2014;NOVELLI et al, 2021;SMARSI et al, 2008).…”