Significant improvement of salt tolerance with 2-day acclimatization treatment in Elaeagnus oxycarpa seedlings

Naoki Murata, Fumiko Iwanaga, Ailijiang Maimaiti, Shogo Imada, Nobuhiro Mori, Kiyoshi Tanaka, Norikazu Yamanaka

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Abstract

To enhance the salt tolerance of Elaeagnus oxycarpa, an orchard tree widely used for revegetation in northwest China, we applied a stress acclimatization treatment to hydroponically grown seedlings for 2 days by adding polyethylene glycol (PEG) to the culture solution. The seedlings were then transferred to culture solution containing 300mM NaCl for 2 weeks to evaluate their salt tolerance. All seedlings pretreated with 20% (w/v) PEG survived until the end of the NaCl treatment, while most seedlings without the acclimatization treatment died. The photosynthetic rate and chlorophyll fluorescence of the un-pretreated seedlings were dramatically decreased by salt stress; however, photosynthesis was maintained and chlorophyll fluorescence was almost unchanged in the seedlings subjected to acclimatization pretreatment with 20% PEG. The acclimatization treatment significantly increased fructose, glucose, and Ca 2+, and slightly increased maltose, K +, Mg 2+, and β-alanine betaine in leaves. We conclude that 2-day stress acclimatization treatment can improve salt tolerance of E. oxycarpa seedlings enough to adapt them to a lethal concentration of NaCl.

Original languageEnglish
Pages (from-to)170-174
Number of pages5
JournalEnvironmental and Experimental Botany
Volume77
DOIs
Publication statusPublished - Apr 1 2012

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All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Agronomy and Crop Science
  • Plant Science

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