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Acta Physiologiae Plantarum

, Volume 34, Issue 5, pp 1747–1755 | Cite as

Salt tolerance of Hibiscus hamabo seedlings: a candidate halophyte for reclamation areas

  • Junmin LiEmail author
  • Jingjing Liao
  • Ming Guan
  • Enfeng Wang
  • Jing Zhang
Original Paper

Abstract

In order to evaluate the salinity tolerance of Hibiscus hamabo Siebold & Zuccarini (Malvaceae), a candidate halophyte for reclamation areas, we analyze the effects of NaCl concentration, ranging from 0 to 500 mM, on the morphological, photosynthetic and chlorophyll fluorescent traits of this species. The optimal concentration for the germination of H. hamabo was 25 mM NaCl, and the optimal concentration for the survival and growth of H. hamabo ranged from 5 to 10 mM NaCl. Growth traits of H. hamabo at 25 mM, including the plant height, canopy diameter, number of leaves and width of the largest leaf, showed no statistical differences from the control. Net photosynthetic rate, stomatal conduction, light utilization efficiency, water utilization efficiency, maximal photosynthetic rate, light saturation point and chlorophyll content were the highest at 7.5 mM NaCl. F v/F m and F v/F 0 at 5 and 7.5 mM were significantly higher than the others, while F 0 was significantly lower. F m and F v at NaCl concentrations ranging from 2.5 to 10 mM were significantly higher than the others. Pearson correlation analysis showed that the chlorophyll content, maximal photosynthetic rate and light saturation point were significantly positively correlated with the number of leaves, while F 0 was significantly negatively correlated with the width of the largest leaf. Light compensation point was significantly negatively correlated with plant height, leaf number, width of the largest leaf and canopy diameter, and might be a good indicator for the salt tolerance of H. hamabo.

Keywords

Hibiscus hamabo Salt stress Photosynthesis Chlorophyll fluorescence Chlorophyll content Growth 

Notes

Acknowledgments

We thank T. Suja and D. Ashley for the English editing of the paper. This study was supported by the Yuhuan Science Technology Bureau of Zhejiang Province.

Conflict of interest

The authors declare that no competing interests exist.

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Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2012

Authors and Affiliations

  • Junmin Li
    • 1
    Email author
  • Jingjing Liao
    • 1
  • Ming Guan
    • 1
  • Enfeng Wang
    • 2
  • Jing Zhang
    • 3
  1. 1.Institute of EcologyTaizhou UniversityLinhaiChina
  2. 2.Zhejiang Yuhuan Lűye Agriculture Technology Co. LtdYuhuanChina
  3. 3.School of Life ScienceShanxi Normal UniversityLinfenChina

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