Asian Journal of Agricultural and Horticultural Research

Pineapple (Ananas comosus (L.) Merr.) is an economically important horticultural crop, but the limited availability of uniform and high-quality planting material remains a constraint to its wider cultivation. Stem cuttings from spineless pineapple accessions may provide suitable propagation material; however, their sprouting capacity is often low. Shallot extract (SE) has potential as a natural plant growth regulator because it contains bioactive compounds and endogenous phytohormones that may support shoot and root development. This study evaluated the effects of pineapple accession, SE concentration, and their interaction on the vegetative growth and root anatomy of pineapple stem cuttings. The experiment was conducted in a greenhouse from September 2025 to January 2026 using a two-factor factorial completely randomised design. The first factor consisted of four SE concentrations, namely 0%, 15%, 30%, and 45%, and the second factor consisted of three pineapple accessions, namely accessions 23, 24, and 25. Observed variables included shoot height, number of shoots, number of leaves, leaf length, root length, and root anatomical characteristics. Data were analysed using analysis of variance followed by Duncan’s Multiple Range Test at the 5% significance level. The results showed a significant interaction between pineapple accession and SE concentration only for shoot height. Accession 23 showed a favourable response at 15% SE, whereas accession 25 recorded the greatest shoot height without SE application. Most other vegetative variables were not significantly affected. These findings indicate that the response of pineapple stem cuttings to SE application is accession-specific.