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Contribution of Arbuscular Mycorrhizal Symbiosis to Plant Drought Tolerance: State of the Art

  • JM Ruiz-LozanoEmail author
  • R. Porcel
  • G. Bárzana
  • R. Azcón
  • R. Aroca
Chapter

Abstract

Water deficit is considered one of the most important abiotic constraints limiting plant growth and yield in many areas on the Earth. Indeed, it accounts for over 70 % of yield losses during crop production. Several eco-physiological studies have demonstrated that the arbuscular mycorrhizal (AM) symbiosis improves plant tissue hydration and physiology under drought stress conditions. It is currently accepted that the contribution of AM symbiosis to plant drought tolerance is the result of accumulative physical, nutritional, physiological, and cellular effects. This chapter summarizes, from physiological and molecular points of view, the current knowledge about the mechanisms by which the AM symbiosis is thought to protect host plants against the detrimental effects of water deficit. Thus, the role of fungal hyphae in water uptake and transfer to plant tissues and in modification of soil water retention properties is updated. At the same time, the implication of plant aquaporins in regulation of root hydraulic properties is discussed. The influence of the AM symbiosis on host plant processes such as osmotic adjustment, gas exchange, hormonal balance, and antioxidant capacity is also reviewed.

Keywords

Drought Stress Arbuscular Mycorrhizal Osmotic Adjustment Mycorrhizal Plant Drought Stress Condition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work is part of a MICINN-FEDER project (Project AGL2008-00898).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • JM Ruiz-Lozano
    • 1
    Email author
  • R. Porcel
    • 1
  • G. Bárzana
    • 1
  • R. Azcón
    • 1
  • R. Aroca
    • 1
  1. 1.Departamento de Microbiología del Suelo y Sistemas SimbióticosEstación Experimental del Zaidín (CSIC)GranadaSpain

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