Compatibility of MO PLUS biofertilizer and Paenybacillus polymyxa to stimulate rice germination

Abstract

The level of productivity of rice plantations can be increased through technical improvements in culture, namely spur plant growth. Increasing the germination rate is done by using growth regulators. Plants have limited synthesizing growth hormones in support of optimal growth. Therefore, it is necessary to add additional growth hormone from outside which can be given through fertilizers and symbiosis of microorganisms, including through the help of growth-regulating bacteria. MO Plus which is a combination of biological fertilizers and microorganisms Bradyrhizobium japonicum which is forming soybean root nodules to take nitrogen directly from the air and Streptomycetes as biological control of plant diseases. Efforts to merge MO Plus with P. polymyxa isolates in a consortium of biological product formulations need to be initiated to stimulate rice germination. The research stage consisted of synergistic tests by growing P. polymyxa bacteria and microbial consortium and calculating the number of bacterial colonies 48 hours in liquid media Nutrient Broth. The ability test produced IAA using L-Triptofan as a precursor, and the ability to produce GA3. The results showed that the levels of IAA and GA3 in Mo plus were 0.095 and 2.225 µg.l−1 respectively, while P. polymyxa: 0.087 and 2.251 µg.l−1. Synergism test results show that P. polymyxa and MO Plus bacteria can be grown on the same media simultaneously with the number of colonies of 2.3.108 CFU/ml. The treatment of MO Plus + Paenybacillus has the best influence on germination, wet weight, and dry weight of rice seeds.

Morpho-physiological characterization of bacterial grain rot in rice seed from Gowa Regency, South Sulawesi

“…Burkholderia glumae is one of the most serious seed-infecting bacteria in many rice-producing areas, particularly in South Sulawesi, Indonesia [1]. This bacteria causes grain rot on rice [2].…”