The effectiveness of heavy metal-tolerant microorganisms for supporting plant growth needs to be understood before it can be used as a soil bioremediation agent. The purpose of this study was to determine the effect of heavy metal tolerant microorganisms on the growth of “Narra” seedling (Pterocarpus indicus Wild). Three heavy metals-resistant (Pb, Cd, and Cu) rhizobacteria from a copper (Cu) mined-out site in Marinduque, Philippines showed plant growth promotion in vitro. A treatment combination of formula inoculant A (CuNFbM 4.1, MGR 333), B (CuNFbM 4.1, MGR 333, PbSM 2.1), and O (Uninoculated); compost (0%, 4%); and lime + inorganic fertilizer {without or with lime and inorganic fertilizer (LF0; LF1)} were applied to Narra seedlings planted on 445 mg/kg Cu-contaminated soil. Lime (2 mg/ha) and the recommended dose of soybean inorganic fertilizer were used as positive controls to evaluate the ability of inoculations and composts to promote the growth and used as positive controls to evaluate the ability of inoculants and composts to promote the growth and copper accumulation of narra in greenhouse experiments. All treatment combinations resulted in significant differences in plant height, leaf number, stem diameter, shoot and root dry weight, as well as, shoot, root Cu content, and plant Cu uptake of 13-week-old “Narra”. Inoculated “Narra” could thrive better in mine-degraded soil containing 445 ppm Cu with 4% compost. Inoculant B demonstrated the best plant performance while Pseudomonas synxantha (PbSM 2.1) probably increases the plant’s growth due to 1-aminocyclopropane-1-carboxylate (ACC) deaminase it produces. Accumulation of Cu was higher in the root compared other plant parts. More research is necessary to elucidate the mechanism of plant growth promotion and heavy metal re mediation by P. synxantha.

T. RAHAYU, SUPARTI, A. ASNGAD, S. WIDYAYANTI, KRISTAMTINI, and Y. SIDIQ Citation: Rahayu T, Suparti, Asngad A, Widyayanti S, Kristamtini, Sidiq Y (2023). Endophytic bacteria from banana plant improves the growth and yield of black rice plant. SABRAO J. Breed. Genet. 55(3): 951-964. http://doi.org/10.54910/sabrao2023.55.3.29. Summary Three bacterial isolates selected as

This study evaluated the competitive dynamics and yield performance of soybean-based intercropping systems on dryland Inceptisols. Conducted in Gunungkidul, Yogyakarta, Indonesia, from March to August 2020, the research compared four intercropping systems: upland rice-soybean, maize-soybean, maize-peanut, and maize-upland rice, against their respective monocultures. A randomized complete block design with five replicates was employed. Analysis to assess agronomic performance includes Land Equivalent Ratio (LER), Aggressivity (A), Competitive Ratio (CR), Relative Crowding Coefficient (K), and Actual Yield Loss (AYL). Results clearly demonstrated that maize-soybean intercropping was the most advantageous system for Inceptisols. While maize exhibited greater competitive dominance over soybean, as evidenced by Land Equivalent Ratio (LER) of 1.91, Actual Yield Loss (AYL) of 1.07, Aggressivity (A), and Competitive Ratio (CR), the intercropping system significantly enhanced overall productivity. Notably, maize-soybean intercropping achieved the highest yields. This study highlights the superior competitiveness and productivity of soybean when intercropped with maize on dryland Inceptisols, providing valuable insights for optimizing agricultural practices in these challenging environments.