Biological Potential of Bioorganic Fertilizer Fortified with Bacterial Antagonist for the Control of Tomato Bacterial Wilt and the Promotion of Crop Yields

Abstract

The application of sp. in the biological control of plant soilborne diseases has been shown to be an environmentally friendly alternative to the use of chemical fungicides. In this study, the effects of bioorganic fertilizer (BOF) fortified with SQY 162 on the suppression of tomato bacterial wilt were investigated in pot experiments. The disease incidence of tomato wilt after the application of BOF was 65.18% and 41.62% lower at 10 and 20 days after transplantation, respectively, than in the control condition. BOF also promoted the plant growth. The SQY 162 populations efficiently colonized the tomato rhizosphere, which directly suppressed the number of in the tomato rhizosphere soil. In the presence of BOF, the activities of defense-related enzymes in tomato were lower than in the presence of the control treatment, but the expression levels of the defense-related genes of the plants in the salicylic acid and jasmonic acid pathways were enhanced. It was also found that strain SQY 162 could secrete antibiotic surfactin, but not volatile organic compounds, to suppress. The strain could also produce plant growth promotion compounds such as siderophores and indole-3-acetic acid. Thus, owing to its innate multiple-functional traits and its broad biocontrol activities, we found that this antagonistic strain isolated from the tobacco rhizosphere could establish itself successfully in the tomato rhizosphere to control soilborne diseases.

Bioorganic fertilizer promotes pakchoi growth and shapes the soil microbial structure

“…Among many bioorganic microbial fertilizers, Bacillus subtilis , which is widely distributed in soil and decaying organic matter, is a representative type. It has been shown in previous studies that B. subtilis has good regulatory effects for promoting crop growth, improving soil quality and the crop microenvironment, controlling soil-borne diseases and remediating farmland pollution ( Zhao et al., 2013 ; Wu et al., 2016 ). Meanwhile, due to its excellent stress tolerance, short culture period and convenient application, B. subtilis has increasingly become dominant component in bioorganic fertilizer ( Sun et al., 2020 ).…”

Biological Control of Tomato Phytopathogens as an Alternative to Agricultural Defensives and Antibiotics

“…The utilization of Rhizobacteria and Bacillus sp. used as biological control of bacterial wilt caused by Ralstonia solanacearum (YAMAMOTO et al, 2015;WU et al, 2016), and other pathogens had results proportional to the chemical inducer acibenzolar-S-methyl resistance (ASM) reported by Moura, (2013), andItakaro andcollaborators (2015), as being efficient in the combat to strains of the genus Xanthomonas. Corroborating with these data, Marin et al…”

An Endophytic Strain of Bacillus amyloliquefaciens Suppresses Fusarium oxysporum Infection of Chinese Wolfberry by Altering Its Rhizosphere Bacterial Community

“…Briefly, the roots were lightly shaken to remove loosely attached soil. The soil that was still tightly adhering to the roots was harvested as rhizosphere soil and frozen at −80°C for DNA extraction following the protocol of Wu et al (2016) . Total soil DNA was extracted using a Qiagen DNeasy PowerSoil Kit following all steps provided in the kit handbook 1 .…”