“The Effect of Concentration and Application Interval of Plant Growth-Promoting Rhizobacteria (PGPR) from Thorny Bamboo Roots (Bambusa blumeana) on the Growth and Yield of Chili Pepper (Capsicum frutescens L.) ” (2026) Metamorfosa: Journal of Biological Sciences, 12(2), pp. 134–147. doi:10.24843/metamorfosa.2025.v12.i02.p4.