Bacillus megaterium strain A12 ameliorates salinity stress in tomato plants through multiple mechanisms

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...

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Bibliographic Details
Published inJournal of plant interactions Vol. 14; no. 1; pp. 506 - 518
Main Authors Akram, Waheed, Aslam, Hina, Ahmad, Sajid Rashid, Anjum, Tehmina, Yasin, Nasim Ahmad, Khan, Waheed Ullah, Ahmad, Aqeel, Guo, Juxian, Wu, Tingquan, Luo, Wenlong, Li, Guihua
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 01.01.2019
Taylor & Francis Ltd
Taylor & Francis Group
Subjects
Bacillus megaterium
Cultivation
Fruit cultivation
Gene expression
Homeostasis
Maintenance
Photosynthesis
Photosynthetic apparatus
Plant growth
Plant physiology
redox homeostasis
Salinity
Salinity effects
salinity tolerance
Strain
Stress
tomato
Tomatoes
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Summary: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.
ISSN:1742-9145
1742-9153
DOI:10.1080/17429145.2019.1662497