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Author: search.filters.author.Song, J. J.Subject: search.filters.subject.Chaetomium

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    Nanofibers derived from endophytic Chaetomium brasilense for growth stimulation of rice
    (2022-03-01)
    Song, J. J.
    ;
    Soytong, K.
    ;
    Thianrat, L.
    Chaetomiumn brasilense PT302 was endophytically isolated from rice var Supanburi 1 and Prathumthani 80 which firstly selected for investigation to promote the growth of rice. It is morphologically and molecular phylogenetic confirmation through ITS1 and ITS4 as Ch.brasilense PT302 compared to Achaetomium strumarium (JX863914) as out group. Crude metabolites (crude hexane, crude ethyl acetate and crude methanol) at 50 ppm from Ch. brasiliense were proved to promote seed germination of rice var. Supanburi 1 and Pathumtani 80 at 7 days which found significantly higher seed germination than the non-treated control. Nanofibers constructed Ch. brasiliense promoted significantly higher seed germination, plant height and number of tillers than the non-treated control in rice var Supanburi 1 and Prathumthani 80 in 7 days at low concentration of 5 ppm planted in Chachengsao and Bangkok soil series. Nanofibers derived from endophytic Ch. brasilense is actively promoted plant growth at lower concentration than crude metabolites. It is firstly reported the natural product nanofiber constructed from endophytic Ch. brasilense to stimulate plant growth.
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    Research investigation of natural products from microorganisms for sustainable agriculture in Vietnam: A short comminication
    (2020-01-01)
    Soytong, K.
    ;
    Song, J. J.
    ;
    Dinh, M. T.
    ;
    Hoang, H.
    The potent microorganisms used for sustainable agriculture in Vietnam has been investigated by Soytong, K. for years. The natural products named synegistic Chaetomium and Trichoderma Biofungicide, Biodegradable nano-elicitor for plant immunity and Biodecomposer for soil revitalization and improvement through fermentation to increase organic matter and fertility in the cultivated soils. The mixture of several strains of powerful Chaetomium for plant disease control to be a broad spectrum biofungicide and enzymatic fungi for biodecomposer are proved to be synergistic fungal community. A novel biodegradable nano-particles contructed from active metabolites of Chaetomium spp named nano-elicitor is discovered to induce immunity in plants eg rice, tomato, durian and citrus. Biodecomposer demonstasrtes as a synergistic group of microorganism producing cellulase, hemicellulase, ligninase and protease that produced from Achaetomium sp., Eurotium sp, Emericella sp, Trichoderma sp., Aspergillus japonicus, Aspergillus terreus and 3 benefit bacteria to degrade organic and inorganic materials, and improve soil revitalization and productivity. Withis some parts of research projects were supported by Ministry of Agriculture and Rural Development in Vietnam.
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    Nano-particles from Chaetomium lucknowense to inhibit rice blast pathogen causded by Pyricularia oryzae in pot experiment
    (2018-12-01)
    Song, J. J.
    ;
    Soytong, K.
    ;
    Kanokmedhakul, S.
    ;
    Kanokmedhakul, K.
    Nano-particles derived from Chaetomium lucknowense proved to be antagonized Pyricularia oryzae causing rice blast disease var. RD57. Result showed that nano-ECL, nano-MCL and nano-HCL expressed antifungal activities against P. oryzae (rice blast disease) at the ED <inf>50</inf> values were 82, 114, 181ppm, respectively. In pot experiment, the nano-CL gave significantly better to control rice blast than the chemical fungicide (Tricyclazole) in rice var. RD57. Rice blast disease showed that nano-CL gave the highest reduction of 54 %, when compared to the chemical fungicide that the disease decreased 29.26 %. Application of nano-CL gave the highest plant strands of 87.62 cm when compared to Tricyclazole (74.91 cm). Nano-particles from C. lucknowense is being developed to be nano-elicitors for plant immunity.
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    Application of nano-particles derived from chaetomium elatum che01 to control pyricularia oryzae causing rice blast
    (2018-11-01)
    Song, J. J.
    ;
    Kanokmedhakul, S.
    ;
    Kanokmedhalkul, K.
    ;
    Soytong, K.
    Pyricularia oryzae causing rice blast was isolated and proved for pathogenicity. Chaetomium elatum ChE01 was proved to be antagonized P. oryzae in bi-culture antagonistic test which averaged inhibition of 60.40 % within 15 days. Fungal metabolites from C. elatum ChE01 were extracted and tested to inhibit P. oryzae. Results showed that crude ethyl acetate expressed antifungal activity against P. oryzae which the effective dose <inf>50</inf> (ED <inf>50</inf> ) was 231 ppm., followed by crude methanol and crude hexane which the ED <inf>50</inf> were 460 and 2,122 ppm. respectively. It was shown that nano-CCE gave the highest inhibition P. oryzae which the ED <inf>50</inf> was 8.25 ppm, and followed by nano-CEM and nano-CEH which the ED <inf>50</inf> values were 11.21 and 65.52 ppm, respectively. Further research findings are investigated in pot and field experiments.