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Scientia Silvae Sinicae ›› 2015, Vol. 51 ›› Issue (9): 51-58.doi: 10.11707/j.1001-7488.20150907

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Differential Growth Performance of Elaeagnus angustifolia Provenances under NaCl Stress

Yang Sheng1,2, Zhang Huaxin2, Yang Xiuyan2, Chen Qiuxia1, Wu Haiwen2   

  1. 1. Zhejiang Institute of Subtropical Crops Wenzhou 325005;
    2. Research Center of Saline and Alkali Land of State Forestry Administration Beijing 100091
  • Received:2014-07-04 Revised:2015-07-08 Online:2015-09-25 Published:2015-10-16

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Abstract:

[Objective] The differences of growth performance of Elaeagnus angustifolia provenances seedlings under NaCl stress were studied to provide guiding basis for introduction of E. angustifolia in salt-alkali soil, and to provide theoretical basis for selection of excellent salt-tolerant germplasm. [Method] With a pot experiment in greenhouse, E. angustifolia seedlings of six provenances (Alaer, ALE; Changji, CJ; Jinchang, JC; Yinchuan, YC; Yanchi, YCH; Dengkou, DK) were treated with different NaCl concentrations (0, 150 and 300 mmol·L-1) for 60 d. The changes of height growth, ground diameter, vane parameters, biomass accumulation and root/shoot ratio were investigated systematically. The salt tolerance of the six provenances was comprehensively evaluated by the membership function method in combination with weight. [Result] Except for the ALE provenance, the height growth, ground diameter, leaf area per plant, number of leaf and biomass accumulation in the other 5 provenances all were significantly reduced under the 150 mmol·L-1 NaCl stress, and the biggest decrement was found in YC provenance and its height growth, leaf area per plant and biomass accumulation declined 33.32%, 24.47% and 26.55%, respectively. Under the 300 mmol·L-1 NaCl condition, the height growth, leaf area per plant and biomass accumulation of YC provenance reduced to 47.53%, 41.77% and 51.86% of the control, respectively. The other provenances declined less than YC provenance under 300 mmol·L-1 NaCl treatment. The root/shoot ratio was not obviously different under 150 mmol·L-1 NaCl compared with the control groups, but under the 300 mmol·L-1 NaCl concentration, the root/shoot ratio was significantly increased. Using the membership function combined with weight for comprehensive evaluation of salt tolerance, the result showed that ALE provenance seedlings had strongest salt-tolerant ability, followed by DK provenance, and YC provenance was worst, under the 150 mmol·L-1 NaCl concentration. However, JC provenance seedlings showed the strongest salt-tolerant ability under the 300 mmol·L-1 NaCl condition, followed by ALE provenance, and YC provenance was worst again. Integration of evaluation values of the two NaCl concentrations, the sequence of seedling tolerance ability of six different provenances from strong to weak was ALE >JC >DK >YCH >CJ >YC. [Conclusion] The ALE provenance should be appropriate choice for cultivating in the medium or heavy saline soil, while YC provenance is not suitable for planting in those conditions.

Key words: Elaeagnus angustifolia, NaCl stress, provenance, growth performance

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