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Acta Physiologiae Plantarum

, 41:152 | Cite as

Phospholipase C activity is increased in wheat seedlings inoculated with the rhizobacteria Azospirillum brasilense Sp245

  • Elda Castro-Mercado
  • Ernesto García-PinedaEmail author
Original Article
  • 39 Downloads

Abstract

The present study aimed to determine phospholipase C (PLC) activation status during changes promoted by Azospirillum brasilense Sp245 in wheat seedlings. Germinated Triticum aestivum seeds by 3 days were inoculated with different A. brasilense concentrations (1 × 106 and 4 × 106 CFU/mL) and PLC enzyme activity assayed at different times. Root and leaf length, as well as total fresh weight were assessed as growth parameters; moreover, changes in root morphology were analyzed. PLC activity was measured by molybdate assay. Neomycin and LaCI3 treatments verified PLC- and/or Ca2+-dependent effects on inoculated wheat, respectively. A. brasilense increased PLC activity 15–30 min after inoculation. Ca2+-channel blocker LaCI3 decreased PLC activity, and activity did not recover with A. brasilense. The A. brasilense mutant FAJ009, impaired in auxin production, showed decreased PLC activity versus wild type. PLC activity was inhibited by neomycin (PLC inhibitor), concomitant with a decrease in total fresh weight. Exogenous addition of diacylglycerol (DAG) and inositol-1,4,5-trisphosphate (IP3), secondary messengers produced by the activity of PLC, increased root hair length. The putative role of PLC enzyme activity in morphological changes promoted by A. brasilense in wheat seedlings is discussed.

Keywords

Azospirillum brasilense Wheat Phospholipase C Plant growth promotion Neomycin 

Notes

Acknowledgements

The authors are grateful to Dr. Gladys Alexandre (Tennessee University) for revising and rewriting the manuscript. This study was supported by the Coordinación de la Investigación Científica, Universidad Michoacana de San Nicolás de Hidalgo, México.

Compliance with ethical standards

Conflict of interest

The authors declare that there are no conflicts of interests.

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Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2019

Authors and Affiliations

  1. 1.Instituto de Investigaciones Químico BiológicasUniversidad Michoacana de San Nicolás de Hidalgo, Ciudad UniversitariaMoreliaMexico

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