Biological Control of Take-All and Growth Promotion in Wheat by Pseudomonas chlororaphis YB-10

Wheat is a worldwide staple food crop, and take-all caused by var. can lead to a tremendous decrease in wheat yield and quality. In this study, strain YB-10 was isolated from wheat rhizospheric soil and identified as by morphology and 16S rRNA gene sequencing. YB-10 had extracellular protease and ce...

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Published inPathogens (Basel) Vol. 10; no. 7; p. 903
Main Authors Xu, Wen, Xu, Lingling, Deng, Xiaoxu, Goodwin, Paul H, Xia, Mingcong, Zhang, Jie, Wang, Qi, Sun, Runhong, Pan, Yamei, Wu, Chao, Yang, Lirong
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 17.07.2021
MDPI
Subjects
Acetic acid
Acids
Antibiotics
Bacteria
biocontrol
Biological control
Cellulase
Coatings
Crop yield
Enzymes
Flowers & plants
Gaeumannomyces graminis
Gaeumannomyces graminis var. tritici
Gene sequencing
growth-promoting
Indoleacetic acid
Morphology
Pathogens
Phylogenetics
Plant diseases
Plant growth
Pseudomonas
Pseudomonas chlororaphis
rRNA 16S
Seedlings
Seeds
Statistical analysis
take-all
Take-all disease
Variance analysis
Wheat
Beijing China
China
Pseudomonas chlororaphis
growth-promoting
take-all
biocontrol
Gaeumannomyces graminis var. tritici
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Summary:Wheat is a worldwide staple food crop, and take-all caused by var. can lead to a tremendous decrease in wheat yield and quality. In this study, strain YB-10 was isolated from wheat rhizospheric soil and identified as by morphology and 16S rRNA gene sequencing. YB-10 had extracellular protease and cellulase activities and strongly inhibited the mycelium growth of var. in dual cultures. Up to 87% efficacy of YB-10 in controlling the take-all of seedlings was observed in pot experiments when wheat seed was coated with the bacterium. YB-10 was also positive for indole acetic acid (IAA) and siderophore production, and coating wheat seed with the bacterium significantly promoted the growth of seedlings at 10 and 10 CFU/mL. Furthermore, treatment with YB-10 increased activities of the wheat defense-related enzymes POD, SOD, CAT, PAL and PPO in seedlings, indicating induced resistance against pathogens. Overall, YB-10 is a promising new seed-coating agent to both promote wheat growth and suppress take-all.
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ISSN:2076-0817
2076-0817
DOI:10.3390/pathogens10070903