Journal
JOURNAL OF PLANT INTERACTIONS
Volume 14, Issue 1, Pages 506-518Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17429145.2019.1662497
Keywords
Bacillus megaterium; tomato; salinity tolerance; photosynthesis; redox homeostasis
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Funding
- Guangzhou Science and Technology Foundation [201704020100]
- President of Guangdong academy of Agricultural Sciences Fund [2018B]
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Plants must cope with the stress conditions to survive. Plant growth promoting rhizobacteria can improve plant growth either directly or indirectly under stress conditions. However, the possible mechanisms remain unclear. Here we report that Bacillus megaterium strain A12 (BMA12) maintains hormonal and redox homeostasis and restores the photosynthetic efficacy of tomato plants through multiple mechanisms to survive under salinity stress conditions. Tomato plants were co-cultivated with BMA12 under saline conditions. The application of BMA12 significantly increased plant growth and photosynthetic capacity. BMA12 decreased production of ROS and ethylene but increased expression levels of selected genes responsible for repairing of damaged photosynthetic apparatus and maintenance of redox homeostasis. Furthermore, BMA12 significantly altered metabolic profile to restore perturbations of tomato plant physiology impaired with salinity stress. This study proves that BMA12 can be used in the conventional agriculture system in the salinity effected fields.
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