Plant Diversity ›› 2009, Vol. 31 ›› Issue (03): 260-264.DOI: 10.3724 SP.J.1143.2009.08221

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Physiological Responses of Betula halophila (Betulaceae) to Salt Stress

ZHANG Hai-Bo, ZENG You-Ling, LAN Hai-Yan , ZHANG Fu-Chun   

  1. Xinjiang Key Laboratory of Biological Resources and Genetic Engineering , College of Life Science and Technology , Xinjiang University , Urumqi 830046 , China
  • Received:2008-12-10 Online:2009-06-25 Published:2009-06-25

Abstract: The physiological responses and the relevant anatomical structure of Betula halophila under salt stress were assayed. Results showed that the relative water and proline contents of the leaf were gradually declined, while the MDA content was correlated with the CAT activity in the leaf under salt stress. The CAT activity was ascended responding to the stability of MDA content at 50 - 200 mmol/L NaCl , but it was decreased at 300mmol/L NaCl , which caused the elevation of the MDA. The K+􊄯Na + ratios in the leaf and root were declined under salt stress, while the K+ content was always higher than Na + content in leaf. Crystals of Betula halophila containing the C, O and Ca element were discovered in the stem and leaf, but not in root, and will be further confirmed by chemical experiment related to cell components .

Key words: Betula halophila

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