This study is aimed at assessing the ability of two endophytic bacteria originally isolated from healthy oil palm roots,
Pseudomonas sp. (UPMP3) and Burkholderia sp. (UPMB3) to induce resistance in susceptible Berangan banana against
Fusarium oxysporum race 4 (FocR4). Increased accumulation of resistance-related enzymes such as peroxidase (PO),
phenylalanine ammonia lyase (PAL), lignithioglycolic acid (LTGA), and pathogenesis-related (PR) proteins (chitinase and
β-1,3-glucanase) has been observed in plantlets treated with endophytic bacteria UPMP3 and UPMB3 singly or as mixture
under glasshouse conditions. Pre-inoculation of banana plantlets with UPMP3 showed a significant reduction in Fusarium
wilt incidence 72 d after challenged inoculation with FocR4. UPMB3 was less effective in suppressing Fusarium wilt
compared to UPMP3, whereas, the mixture of both endophytes showed an intermediate effect. Based on these results, it
is concluded that UPMP3 could be a promising biological control agent that can trigger resistance against Fusarium wilt
in susceptible Berangan banana.