Influence of Plant Growth-Promoting Rhizobacteria (PGPR) Concentration and Soaking Duration on the Vegetative Growth of Premna oblongifolia Merr
DOI:
https://doi.org/10.53797/agrotech.v5i1.3.2026Keywords:
Soaking Time, PGPR Concentration, Cuttings, Green grass jelly (Premna oblongifolia Merr.)Abstract
Indonesia is a country with abundant natural wealth, including a wide variety of flora and fauna that grow and thrive within its territory. Among them are plants that can be utilized as medicinal resources and food ingredients, one of which is green grass jelly (cincau hijau). This study aims to determine the effect and interaction between soaking time and PGPR concentration on the growth of green grass jelly (Premna oblongifolia Merr.) stem cuttings. The research was conducted from June to September 2024 in Sambirejo Village, Gabus District, Pati Regency. This study used a randomized complete block design (RCBD). The first factor was the length of soaking (L), namely L1 (20 minutes), L2 (40 minutes), and L3 (60 minutes). The second factor is concentration (K), namely K0 (control), K1 (2 ml/L), K2 (4 ml/L), and K3 (6 ml/L). The results showed that soaking duration had no significant effect on the growth of green grass jelly (Premna oblongifolia Merr.) stem cuttings. In contrast, PGPR concentration significantly influenced the growth of the cuttings, particularly root length and root dry weight. A PGPR concentration of 6 mL L⁻¹ resulted in the highest growth performance of green grass jelly stem cuttings. An interaction between soaking duration and PGPR concentration was observed for root length, with the best response obtained from a soaking duration of 40 minutes combined with a PGPR concentration of 6 mL L⁻¹.
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