Mechanical strengthening and metabolic re-modulations are involved in protection against Fusarium wilt of tomato by B. subtilis IAGS174

Journal of Plant Interactions

Sabin Fatima¹  Guihua Li²  Aqeel Ahmad²  Waheed Akram²  Mario Juan Simirgiotis³  Shakeel Ahmed³  Nasim Ahmad Yasin⁴  Basharat Ali⁴  Tehmina Anjum⁴ 

[1] Directorate General of Pest Warning and Quality Control of Pesticides Punjab;Guangdong Academy of Agricultural Sciences;Universidad Austral de Chile;University of the Punjab;

关键词: fusarium wilt;    induced resistance;    lignin;    phenylpropenoids;    phytoalexins;    tomato;   

DOI  :  10.1080/17429145.2021.1966107

来源: DOAJ

【 摘 要 】

Rhizospheric bacteria may induce resistance to plant diseases. However, the underlying plant resistance mechanisms are unclear. We demonstrated the potential ability of the rhizobacterial strain Bacillus subtilis IAGS174 to elicit systemic resistance in tomato plants against Fusarium wilt pathogens. Comparative biochemical, histological, and molecular analyses were conducted to screen the differential responses between non-inoculated and B. subtilis IAGS174-inoculated tomato plants followed by pathogen challenge. B. subtilis IAGS174 had a significant inhibitory effect on disease development and reduced the disease index. B. subtilis IAGS174-primed plants exhibited significantly improved synthesis of total phenolics, flavonoids, and plant defense enzymes. Furthermore, priming increased the production of physical defense barriers including lignin. Additionally, RT-qPCR analysis revealed that disease resistance in bacteria-treated tomato plants was associated with increased expression levels of lignin-related and phenylpropanoid biosynthetic genes. Our findings support a positive role of B. subtilis IAGS174 in triggering immunity of tomato plants against a soil-borne disease.

【 授权许可】

Unknown