摘要：Rice blast disease caused by Pyricularia oryzae Cav. frequently occurs as limiting factor for rice production in many parts of the world where rice is grown. The disease has been known to cause significant yield looses in rice including local varieties. Padi Merah Medang Putih, is one of Bali rice local varieties that popular among consumers, however this variety is highly susceptible to the blast disease. This study was done to find and identify plant growth promoting rhizobacteria (PGPR) that capable of inducing resistance against blast disease on Padi Merah Medang Putih. Ninety five isolates of rhizobacteria were isolated from diverse plant rhizospheres grown in Bali and tested for their ability to promote the rice growth and induce resistance against blast disease. Nine isolates have been proven serve as PGPR and among them four isolates namely KDDA, O38, OR3 and Al7Kla are capable of inducing resistance against blast disease on Padi Merah Medang Putih. Based on 16S rDNA sequence analysis, these PGPR are respectively identified as Bacillus methylotrophicus KDDA, Bacillus amyloliquefaciens O38, Pseudomonas aeruginosa OR3 and Achromobacter xylosoxidans Al7Kla. All of these PGPR can be further utilized to induced resistance against blast disease on Bali local rice variety, Padi Merah Medang Putih under green house as well as field condition.
