Bacillus megaterium GEB3 reduces accumulation of reactive oxygen species and enhances drought tolerance in peppers
Abstract Plant growth-promoting rhizobacteria regulate plant growth and stress tolerance by modulating endogenous developmental and physiological processes. This study examined the role of Bacillus megaterium GEB3 in affecting drought stress tolerance in peppers. GEB3 treatment significantly mitigat...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-04-01
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| Series: | Applied Biological Chemistry |
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| Online Access: | https://doi.org/10.1186/s13765-025-00989-9 |
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| author | Dongryeol Park Jinwoo Jang Geupil Jang |
| author_facet | Dongryeol Park Jinwoo Jang Geupil Jang |
| author_sort | Dongryeol Park |
| collection | DOAJ |
| description | Abstract Plant growth-promoting rhizobacteria regulate plant growth and stress tolerance by modulating endogenous developmental and physiological processes. This study examined the role of Bacillus megaterium GEB3 in affecting drought stress tolerance in peppers. GEB3 treatment significantly mitigated drought-induced symptoms, such as chlorosis, wilting, and leaf rolling, in both vegetative- and reproductive-stage peppers. For example, GEB3 treatment increased the number of fruits and total fruit weight by approximately 34% and 68%, respectively, compared to those in untreated control plants. We observed that GEB3 treatment reduces drought-induced reactive oxygen species (ROS) accumulation while increasing the transcriptional expression of antioxidant genes encoding peroxidases and superoxide dismutases, which are responsible for ROS removal. Furthermore, GEB3 activated the jasmonic acid (JA) response, and JA treatment alone was sufficient to reduce the accumulation of ROS and enhance pepper tolerance to drought stress. These findings suggest that Bacillus megaterium GEB3 increases drought tolerance in peppers through JA-mediated suppression of ROS accumulation, and may serve as a promising bioinoculant for improving crop tolerance against environmental stresses including drought. |
| format | Article |
| id | doaj-art-44b2f336bb034a5ab4b6170ab709d9aa |
| institution | OA Journals |
| issn | 2468-0842 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Applied Biological Chemistry |
| spelling | doaj-art-44b2f336bb034a5ab4b6170ab709d9aa2025-08-20T02:28:11ZengSpringerOpenApplied Biological Chemistry2468-08422025-04-0168111010.1186/s13765-025-00989-9Bacillus megaterium GEB3 reduces accumulation of reactive oxygen species and enhances drought tolerance in peppersDongryeol Park0Jinwoo Jang1Geupil Jang2School of Biological Sciences and Technology, Chonnam National UniversitySchool of Biological Sciences and Technology, Chonnam National UniversitySchool of Biological Sciences and Technology, Chonnam National UniversityAbstract Plant growth-promoting rhizobacteria regulate plant growth and stress tolerance by modulating endogenous developmental and physiological processes. This study examined the role of Bacillus megaterium GEB3 in affecting drought stress tolerance in peppers. GEB3 treatment significantly mitigated drought-induced symptoms, such as chlorosis, wilting, and leaf rolling, in both vegetative- and reproductive-stage peppers. For example, GEB3 treatment increased the number of fruits and total fruit weight by approximately 34% and 68%, respectively, compared to those in untreated control plants. We observed that GEB3 treatment reduces drought-induced reactive oxygen species (ROS) accumulation while increasing the transcriptional expression of antioxidant genes encoding peroxidases and superoxide dismutases, which are responsible for ROS removal. Furthermore, GEB3 activated the jasmonic acid (JA) response, and JA treatment alone was sufficient to reduce the accumulation of ROS and enhance pepper tolerance to drought stress. These findings suggest that Bacillus megaterium GEB3 increases drought tolerance in peppers through JA-mediated suppression of ROS accumulation, and may serve as a promising bioinoculant for improving crop tolerance against environmental stresses including drought.https://doi.org/10.1186/s13765-025-00989-9Stress toleranceBacillus megateriumDroughtJasmonic acidPepperReactive oxygen species |
| spellingShingle | Dongryeol Park Jinwoo Jang Geupil Jang Bacillus megaterium GEB3 reduces accumulation of reactive oxygen species and enhances drought tolerance in peppers Applied Biological Chemistry Stress tolerance Bacillus megaterium Drought Jasmonic acid Pepper Reactive oxygen species |
| title | Bacillus megaterium GEB3 reduces accumulation of reactive oxygen species and enhances drought tolerance in peppers |
| title_full | Bacillus megaterium GEB3 reduces accumulation of reactive oxygen species and enhances drought tolerance in peppers |
| title_fullStr | Bacillus megaterium GEB3 reduces accumulation of reactive oxygen species and enhances drought tolerance in peppers |
| title_full_unstemmed | Bacillus megaterium GEB3 reduces accumulation of reactive oxygen species and enhances drought tolerance in peppers |
| title_short | Bacillus megaterium GEB3 reduces accumulation of reactive oxygen species and enhances drought tolerance in peppers |
| title_sort | bacillus megaterium geb3 reduces accumulation of reactive oxygen species and enhances drought tolerance in peppers |
| topic | Stress tolerance Bacillus megaterium Drought Jasmonic acid Pepper Reactive oxygen species |
| url | https://doi.org/10.1186/s13765-025-00989-9 |
| work_keys_str_mv | AT dongryeolpark bacillusmegateriumgeb3reducesaccumulationofreactiveoxygenspeciesandenhancesdroughttoleranceinpeppers AT jinwoojang bacillusmegateriumgeb3reducesaccumulationofreactiveoxygenspeciesandenhancesdroughttoleranceinpeppers AT geupiljang bacillusmegateriumgeb3reducesaccumulationofreactiveoxygenspeciesandenhancesdroughttoleranceinpeppers |