Effects of Rahnella aquatilis JZ-GX1 on Treat Chlorosis Induced by Iron Deficiency in Cinnamomum camphora

  • Wei-Liang Kong
  • Xiao-Qin WuEmail author
  • Yin-Juan Zhao


With the increasing popularity of urban landscaping, there is a greater need to address iron deficiency and chlorosis in Cinnamomum camphora. Beneficial microorganisms can play an important role in improving plant iron nutrition. In this study, we evaluated the greening effect that results from inoculating C. camphora with Rahnella aquatilis JZ-GX1. We conducted in vitro experiments to determine the effectiveness of JZ-GX1 in reducing extracellular iron(III) ions in siderophores and producing organic acids under low-iron conditions. Potted, chlorotic C. camphora seedlings were inoculated, and parameters related to growth and iron nutritional status were measured. Inoculation by JZ-GX1 had a more pronounced greening effect on C. camphora than the traditional iron sulfate treatment for plant iron deficiency. Inoculated plants exhibited higher levels of active iron in the leaves, enhanced rhizosphere acidification capacity and ferric chelate reductase activity. Furthermore, the complete root system and chloroplast developmental structures were observed. Our results demonstrate the potential roles of R. aquatilis JZ-GX1 in promoting iron absorption in C. camphora.


Alkaline soil Cinnamomum camphora Iron deficiency chlorosis Rahnella aquatilis 



This work was supported by the National Key Research and Development Program of China (2017YFD0600104) and the Priority Academic Program Development of the Jiangsu Higher Education Institutions (PAPD). We are grateful to Dr. De-Wei Li of the Connecticut Agricultural Experiment Station, USA for reviewing the manuscript.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Authors and Affiliations

  1. 1.Co-Innovation Center for Sustainable Forestry in Southern China, College of ForestryNanjing Forestry UniversityNanjingChina
  2. 2.Jiangsu Key Laboratory for Prevention and Management of Invasive SpeciesNanjing Forestry UniversityNanjingChina

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