Background: is an important crop in Asian countries given its pharmaceutical uses. It is usually harvested after 4-6 years of cultivation. However, various abiotic stresses have led to its quality reduction. One of the stress causes is high content of heavy metal in ginseng cultivation area. Plant growth-promoting rhizobacteria (PGPR) can play a role in healthy growth of plants. It has been considered as a new trend for supporting the growth of many crops in heavy metal occupied areas, such as Aluminum (Al).
Methods: screening of the plant growth promoting activities of five tested strains were detected. Surface-disinfected 2-year-old ginseng seedlings were dipping in DCY116 suspensions for 15 min and cultured in pots for investigating Al resistance of . The harvesting was carried out 10 days after Al treatment. We then examined HO, proline, total soluble sugar, and total phenolic contents. We also checked the expressions of related genes (, , and ) of reactive oxygen species scavenging response and pyrroline-5-carboxylate synthetase by reverse transcription polymerase chain reaction (RT-PCR) method.
Results: Among five tested strains isolated from ginseng-cultivated soil, DCY116 was chosen as the potential PGPR candidate for further study. Ginseng seedlings treated with DCY116 produced higher biomass, proline, total phenolic, total soluble sugar contents, and related gene expressions but decreased HO level than nonbacterized Al-stressed seedlings.
Conclusion: DCY116 can be used as potential PGPR and "plant strengthener" for future cultivation of ginseng or other crops/plants that are grown in regions with heavy metal exposure.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8134844 | PMC |
| http://dx.doi.org/10.1016/j.jgr.2020.01.001 | DOI Listing |
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