Screening ofBacillusstrains in biocontrol of pathogenDickeya dadantiicausing stem and root rot disease of sweet potato
文献类型： 外文期刊
作者： Hossain, Afsana 1 ; Masum, Md Mahidul Islam 1 ; Wu, Xiuqin 1 ; Abdallah, Yasmine 1 ; Ogunyemi, Solabomi Olaitan; 1 ;
作者机构： 1.Zhejiang Univ, Zhejiang Prov Key Lab Biol Crop Pathogens & Insec, Key Lab Mol Biol Crop Pathogens & Insects, Inst Biotechnol,Minist Agr,State Key Lab Rice Bio, Hangzhou, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, State Key Lab Qual & Safety Agroprod, Hangzhou, Peoples R China
3.Sylhet Agr Univ, Dept Plant Pathol & Seed Sci, Sylhet, Bangladesh
4.Bangabandhu Sheikh Mujibur Rahman Agr Univ, Dept Plant Pathol, Gazipur, Bangladesh
5.Menia Univ, Fac Agr, Dept Plant Pathol, Al Minya, Egypt
关键词： Dickeya; soft rot; Bacillus; lipopeptide; biofilm
期刊名称：BIOCONTROL SCIENCE AND TECHNOLOGY （ 影响因子：1.665； 五年影响因子：1.616 ）
ISSN： 0958-3157
年卷期： 2020 年 30 卷 11 期
页码：
收录情况： SCI
摘要： Outbreaks of stem and root rot disease of sweet potato caused byDickeya dadantiirecently occurred in major sweet potato planting areas in China. This study aimed to screen effectiveBacillusstrains in biocontrol of the bacterial soft rot pathogen. We screened plant-associatedBacillusstrains capable of inhibitingD. dadantiiusing anin vitrooverlay culture assay and anin vivotuber slice assay. AllBacillusstrains inhibitedD. dadantiigrowth and maceration of sweet potato tubers. Two strainsB. amyloliquefaciensA3 andB. velezensisA2 showed significantly higher rates ofin vitroinhibition (55% and 50%) onD. dadantiigrowth andin vivoreduction (82% and 77%) of the maceration of sweet potato tuber slices byD. dadantiithan otherBacillusstrains did. They showed broad-spectrum inhibition on growth of soft rotDickeyaandPectobacteriumstrains. They protected sweet potato seed tubers from infection byD. dadantiiand promoted seedling growth. Their culture supernatants inhibitedD. dadantiigrowth, swimming and biofilms and damagedD. dadantiicells.B. amyloliquefaciensA3 is more effective thanB. velezensisA2 in producing surfactins, well-known lipopeptide antibiotics and biosurfactants, and inhibitingD. dadantii. Together, we developed an effective method to screen effectiveBacillusstrains to control the soft rot pathogenD. dadantiiand screened out a strong surfactin producerB. amyloliquefaciensA3, which can be used as a reference strain for further screening of more effectiveBacillusstrains and to develop an agent to control the stem and root rot disease of sweet potato.
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