Biocontrol and growth-promoting potential of Bacillus cereus TuR6 against rhizome rot disease in turmeric (Curcuma longa L.)

Do, Quang Trung (author), Nguyen, Trong Tri (author), Dinh, Mai Van (author), Nguyen, Manh Ha (author), Bui, Xuan Dong (author)

Rhizome rot disease caused by Fusarium solani severely limits turmeric (Curcuma longa L.) productivity. This study aimed to isolate endophytic bacterial strains from turmeric roots and screen them for plant growth-promoting (PGP) traits and antifungal activity. Among 10 isolates, strain TuR6, identified as Bacillus cereus (98.68% similarity, GenBank accession: PV565573), showed the highest IAA production (75.41 mg/L), strong phosphate solubilization (PSI 5.32), and positive siderophore, protease, and cellulase activities. TuR6 inhibited F. solani growth by 78.12% in vitro. In greenhouse trials, TuR6 significantly increased plant height (80.57 cm), rhizome yield (371 g/plant), and reduced disease incidence (17.7%). Field experiments confirmed its efficacy, with notable growth and disease suppression improvements under natural conditions. These results highlight B. cereus TuR6 as a potential bioinoculant for enhancing turmeric yield and managing rhizome rot sustainably.

• Language: English
• Keywords: endophytic bacteria, plant growth-promoting bacteria, biocontrol, turmeric roots, biofertilizer
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2026
• Number of pages: 9 str.
• Numbering: Vol. 122, no. 1
• PID: 20.500.12556/RUL-180474
• UDC: 632
• ISSN on article: 1854-1941
• DOI: 10.14720/aas.2026.122.1.22954
• COBISS.SI-ID: 271100675
• Publication date in RUL: 10.03.2026

Record is a part of a journal

• Title: Acta agriculturae Slovenica
• Publisher: Biotehniška fakulteta, Oddelek za agronomijo in Oddelek za zootehniko, Biotehniška fakulteta, Oddelek za agronomijo in Oddelek za zootehniko, Univerza v Ljubljani, Biotehniška fakulteta, Založba Univerze v Ljubljani
• ISSN: 1854-1941
• COBISS.SI-ID: 219581184

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Title: Biokontrola in potencial spodbujanja rasti bakterije Bacillus cereus TuR6 proti gnilobi korenike pri kurkumi (Curcuma longa L.)
• Keywords: endofitne bakterije, bakterije, ki pospešujejo rast rastlin, biotično varstvo rastlin, korenine kurkume, biognojilo