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Bio platform of GS Caltex for Eco-friendly polymers
Hyohak Song(송효학) 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
The bio-related R&D platform of GS Caltex is one of our strength, enabling us to create values with partners by using our resources and capabilities efficiently. Within lab., pilot, and demonstration plants and infrastructure, our expertise in the area of microorganisms, fermentation, and separation and purification makes possible to deliver new and existing products from one kilogram to a few tons. In particular, two demonstration plants located in Gusan and Yeosu cities are to shorten the time to market. We have developed a number of bio-originated monomers that can be used to synthesize eco-friendly polymers.
Kalaiselvi Duraisamy,하아름(Areum Ha),Jongmun Kim,박애란(Ae Ran Park),김보라(Bora Kim),송찬우(Chan Woo Song),송효학(Hyohak Song),김진철(Jin-Cheol Kim) 한국식물병리학회 2022 Plant Pathology Journal Vol.38 No.3
Turfgrass, the most widely grown ornamental crop, is severely affected by fungal pathogens including Sclerotinia homoeocarpa, Rhizoctonia solani, and Magnaporthe poae. At present, turfgrass fungal disease management predominantly relies on synthetic fungicide treatments. However, the extensive application of fungicides to the soil increases residual detection frequency, raising concerns for the environment and human health. The bacterial volatile compound, 2,3-butanediol (BDO), was found to induce plant resistance. In this study, we evaluated the disease control efficacy of a combination of stereoisomers of 2,3-BDO and commercial fungicides against turfgrass fungal diseases in both growth room and fields. In the growth room experiment, the combination of 0.9% 2R,3R-BDO (levo) soluble liquid (SL) formulation and 9% 2R,3S-BDO (meso) SL with half concentration of fungicides significantly increased the disease control efficacy against dollar spot and summer patch disease when compared to the half concentration of fungicide alone. In field experiments, the disease control efficiency of levo 0.9% and meso 9% SL, in combination with a fungicide, was confirmed against dollar spot and large patch disease. Additionally, the induction of defense-related genes involved in the salicylic acid and jasmonic acid/ethylene signaling pathways and reactive oxygen species detoxification-related genes under Clarireedia sp. infection was confirmed with levo 0.9% and meso 9% SL treatment in creeping bentgrass. Our findings suggest that 2,3-BDO isomer formulations can be combined with chemical fungicides as a new integrated tool to control Clarireedia sp. infection in turfgrass, thereby reducing the use of chemical fungicides.