English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The studies on the biocontrol potential of pink pigmented facultative methylotrophic (PPFM) bacteria other than the genus  Methylobacterium  are scarce. In the present study, we report three facultative methylotrophic isolates; PPO-1, PPT-1, and PPB-1, respectively, identified as  Delftia lacustris, Bacillus subtilis , and  Bacillus cereus  by 16S rRNA gene sequence analysis. Hemolytic activity was tested to investigate the potential pathogenicity of isolates to plants and humans, the results indicates that the isolates PPO-1, PPT-1, and PPB-1 are not pathogenic strains. Under  in vitro  conditions,  D. lacustris  PPO-1,  B .  subtilis  PPT-1, and  B .  cereus  PPB-1 showed direct antagonistic effect by inhibiting the mycelial growth of fungal pathogens;  Fusarium oxysporum  f. sp.  lycopersici  (2.15, 2.05, and 1.95 cm),  Sclerotium rolfsii  (2.14, 2.04, and 1.94 cm),  Pythium ultimum  (2.12, 2.02, and 1.92 cm), and  Rhizoctonia solani  (2.18, 2.08, and 1.98 cm) and also produced volatile inhibitory compounds. Under plant growth chamber condition methylotrophic bacterial isolates;  D .  lacustris  PPO-1,  B .  subtilis  PPT-1, and  B. cereus  PPB-1 significantly reduced the disease incidence of tomato. Under greenhouse condition,  D .  lacustris  PPO-1,  B .  subtilis  PPT-1, and  B .  cereus  PPB-1 inoculated tomato plants, when challenged with  F .  oxysporum  f. sp.  lycopersici, S .  rolfsii, P .  ultimum , and  R .  solani , increased the pathogenesis related proteins (β-1,3-glucanase and chitinase) and defense enzymes (phenylalanine ammonia lyase, peroxidase, polyphenol oxidase, and catalase) on day 5 after inoculation. In the current study, we first report the facultative methylotrophy in pink pigmented  D. lacustris, B .  subtilis , and  B .  cereus  and their antagonistic potential against fungal pathogens. Direct antagonistic and ISR effects of these isolates against fungal pathogens of tomato evidenced their possible use as a biocontrol agent.

Control of Wilt and Rot Pathogens of Tomato by Antagonistic Pink Pigmented Facultative Methylotrophic Delftia lacustris and Bacillus spp.