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Annals of Forest Science

, Volume 71, Issue 7, pp 811–819 | Cite as

Adventitious sprouting of Pinus leiophylla in response to salt stress

  • Marcos Jimenez-Casas
  • Janusz J. Zwiazek
Original Paper

Abstract

Context

Although adventitious shoots are produced in many tree species in response to injury, little is known about the effects of salinity on sprouting.

Aims

The main objective was to examine the sprouting capacity of Pinus leiophylla seedlings in relation to injury and physiological changes induced by NaCl.

Methods

Seedlings were grown in controlled-environment growth rooms and treated with 0, 100, 150, and 200 mM NaCl. Numbers of adventitious shoots were recorded and growth and physiological parameters measured after 64 days of treatments and following a 30-day recovery period.

Results

NaCl treatments triggered sprouting of adventitious shoots, mainly in the lower parts of the stems. However, fewer sprouts were induced by 200 mM NaCl compared with the lower concentration treatments. These changes were accompanied by needle necrosis, decreased chlorophyll concentrations, seedling dry mass, and stem diameter. Stomatal conductance, net photosynthesis, and root hydraulic conductance decreased with increasing NaCl concentrations and did not return to the control levels after 30 days of stress relief.

Conclusions

Pinus leiophylla has the regeneration potential when exposed to salinity. However, very high salt concentrations induce severe physiological impairments and, consequently, a decrease of this regeneration potential.

Keywords

Adventitious shoots Gas exchange Root hydraulic conductance Salt stress 

Notes

Acknowledgments

We thank the Natural Sciences and Engineering Research Council of Canada and the Mexican Consejo Nacional de Ciencia y Tecnologia (CONACyT) and Colegio de Postgraduados for the financial support of this study.

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Copyright information

© INRA and Springer-Verlag France 2014

Authors and Affiliations

  1. 1.Department of Renewable ResourcesUniversity of AlbertaEdmontonCanada
  2. 2.Especialidad ForestalColegio de Postgraduadosde MéxicoMexico

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