부산대학교 도서관

We screened the fermentation broth of fungi from the rhizosphere soil of passion fruit (Passiflora edulis Sims.) for their herbicidal potential in bioassays and Pot culture. The potent herbicidal compounds of the fungi fermentation broth were evaluated by bioassay and pot test. The candidate substances in the fungi fermentation broth were analysed and identified. Nine fungi (No. 1, 2, 3, 4, 5, 6, 7, 8 and 9) were isolated from the rhizosphere soil of passion fruit using the plate dilution coating method. In Petriplate Bioassay, the fermentation broth of newly identified fungus Aspergillus sydowi 'FJFAFU01' drastically inhibited the growth of lettuce (Lactuca sativa) and barnyard grass (Echinochloa crus-galli). In Pot Culture, 50-times diluted fermentation broth inhibited the barnyard grass height by 42.73%. The HPLC and GC-MS analysis showed that the fermentation broth contained higher contents of nitrogenous compounds and oxygen compounds, including phenolic acids, terpenoids, flavonoids and alkaloids. The Aspergillus sydowi FJFAFU01 screened from the rhizosphere soil of passion fruit contained phenolic acids, terpenoids, flavonoids and alkaloids, these inhibited the growth of barnyard grass. Thus Aspergillus sydowi 'FJFAFU01' may be developed as potential mycoherbicide. [ABSTRACT FROM AUTHOR]