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Different Responses of Capsicum annuum L. Root and Shoot to Salt Stress with Pseudomonas putida Rs-198 Inoculation

  • Yanhui He
  • Zhansheng Wu
  • Wenfei Wang
  • Bang-Ce Ye
  • Furong Zhang
  • Xiaochen Liu
Article
  • 31 Downloads

Abstract

The aim of this work was to compare the different responses of the root and the shoot to salt stress with or without growth-promoting bacteria Pseudomonas putida Rs-198 application. The results revealed that lower salt stress did not show bad effects on plant growth although osmotic tolerance indictors were observed. The results showed that proline content increased by 7.75% and 20.20% in shoot and 323.73% and 449.38% in root under 150 mM and 300 mM salt treatment, respectively. Increasing salt stress also led to a reduction of peroxides enzyme (POD) activity by 16.50% and 15.49% in the shoot and 46.03% and 39.36% in the root under above salt treatments. More importantly, the changes observed in pepper roots were more pronounced than those in pepper shoots except for total soluble sugar and protein. In addition, inoculation of Pseudomonas putida Rs-198 could relieve the changes of these indicators. Further, these changes were more pronounced in non-inoculated control plants than in inoculated plants. Especially, Pseudomonas putida Rs-198-inoculated plants exhibited the greatest increase in polyphenol oxidase activity by 78.06% in shoot and POD activity by 25.22% in root compared with the non-inoculated plants at 150 mM NaCl stress. To the best of our knowledge, these results are the first reported that will more effectively explain the phenomena relationship between plant, salt stress, and plant growth-promoting bacteria.

Graphical Abstract

Physiological changes induced by Pseudomonas putida Rs-198 interaction in Capsicum annuum L. under salt stress.

Keywords

Pseudomonas putida Rs-198 Capsicum annuum L. Salinity stress Osmotic adjustment Antioxidative enzyme 

Notes

Acknowledgements

We would like to thank Mike DiLegge, Vincent Lopez form Center of Rhizosphere Biology, Colorado State University for the review and language edit.

Funding

This work was financially supported by Natural Science Foundation of China (31260022, 21566035), Postgraduate Education Reform and Innovation Program of Autonomous Regions (XJGR12016031), Scientific Research Foundation for Changjiang Scholars of Shihezi University (CJXZ201501). Yanhui He was supported by China Scholarship Council (No. 201709505007).

Compliance with Ethical Standards

Conflict of interest

The authors declare that there are no conflicts of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Chemistry and Chemical EngineeringShihezi UniversityShiheziPeople’s Republic of China
  2. 2.School of Environmental and Chemical EngineeringXi’an Polytechnic UniversityXi’anPeople’s Republic of China

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