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

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文献类型：外文期刊

作者： Akram, Waheed ¹ ; Ahmad, Aqeel ¹ ; Yasin, Nasim Ahmad ³ ; Anjum, Tehmina ⁴ ; Ali, Basharat ⁵ ; Fatima, Sabin ⁶ ; Ahmed ¹ ;

作者机构： 1.Guangdong Acad Agr Sci, Guangdong Key Lab New Technol Res Vegetables, Guangzhou 510640, Peoples R China

2.Guangdong Acad Agr Sci, Vegetable Res Inst, Guangzhou 510640, Peoples R China

3.Univ Punjab, RO II Wing, Lahore, Pakistan

4.Univ Punjab, Fac Agr Sci, Dept Plant Pathol, Lahore, Pakistan

5.Univ Punjab, Inst Microbiol & Mol Genet, Lahore, Pakistan

6.Directorate Gen Pest Warning & Qual Control Pesti, Punjab, Pakistan

7.Univ Austral Chile, Fac Ciencias, Inst Farm, Valdivia, Chile

8.UAM, CSIC, Inst Food Sci Res, Food Lab,CIAL, Madrid, Spain

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

期刊名称：JOURNAL OF PLANT INTERACTIONS （影响因子：4.208；五年影响因子：4.344 ）

ISSN： 1742-9145

年卷期： 2021 年 16 卷 1 期

页码：

收录情况： SCI

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.

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