Agronomy, Год журнала: 2024, Номер 14(12), С. 2856 - 2856

Опубликована: Ноя. 29, 2024

Wilt and root rot diseases caused by Fusarium species can severely affect herbage plants, resulting in significant losses. Currently, the research application of biological control methods targeting Fusarium-related plants are limited. In this study, 11 plant growth-promoting rhizobacterium (PGPR) strains previously screened from alpine grassland were tested to assess their inhibitory effects on oxysporum ability produce siderophores, protease, cellulase, amylase. Meanwhile, properties, such as nitrogenase activity, phosphate dissolution, IAA production, determined. The results showed that PGPR exhibited diverse functionalities. Nine demonstrated antagonistic colony diameter against oxysporum, with Bacillus subtilis gt11 showing strongest inhibition, followed velezensis gt1 gtr1, inhibition rates 73.57%, 69.13%, 67.94%, respectively. test mainly comprised three genera: Pseudomonas, Bacillus, Acinetobacter. Pseudomonas was dominant genus. displayed mechanisms. gt1, gt11, tritici gt6 high levels siderophore, amylase potentially inhibiting degrading its cell wall through these enzyme activities. majority have characteristic producing multiple enzymes. Considering characteristics activity (38.13–505.70 nmol C2H4/vial), solubilization (inorganophosphates ranging 41.18 91.65 μg·mL−1; organophosphates 5.21 31.17 μg·mL−l), secretion (9.27–48.95 μg·mL−1), Acinetobacter calcoaceticus gt14, gtr1 show potential for development into biofertilizers or biocontrol agents.

Язык: Английский