NaCl胁迫下不同种源沙枣的生长表现差异

doi:10.11707/j.1001-7488.20150907

摘要/Abstract

摘要：

[目的] 研究不同种源沙枣在NaCl胁迫下的生长表现差异,以期为盐碱地沙枣引种提供指导依据,也为筛选优良耐盐碱沙枣种质提供理论基础。[方法] 以6个沙枣种源(阿拉尔、昌吉、金昌、银川、盐池和磴口)的实生苗为材料,通过温室盆栽试验,系统调查不同NaCl浓度(0,150和300 mmol·L^-1)处理60天后,沙枣苗高生长量、地径、叶片参数、生物量积累和根冠比的变化规律,并利用隶属函数法结合权重综合评价各沙枣种源幼苗的耐盐能力。[结果] 在150 mmol·L^-1NaCl胁迫条件下,除阿拉尔种源各生长指标与对照之间无明显差异外,其他5个沙枣种源的苗高生长量、地径、单株叶面积、叶片数和总生物积累量均显著减少,其中,银川种源降幅最大,苗高生长量、单株叶面积和生物积累量降幅分别达到33.32%,24.47%和26.55%。在300 mmol·L^-1NaCl胁迫条件下,银川种源沙枣幼苗苗高生长量、单株叶面积和生物量积累分别仅为对照的47.53%,41.77%和51.86%,其他沙枣种源各生长指标降幅均小于银川种源。所有沙枣种源根冠比在150 mmol·L^-1NaCl浓度下与对照之间差异不明显,在300 mmol·L^-1NaCl浓度下,沙枣幼苗的根冠比均显著增加。利用隶属函数法结合权重综合评价6个种源沙枣幼苗的在2个NaCl浓度下的耐盐能力差异,结果显示,在150 mmol·L^-1NaCl下,阿拉尔种源耐盐能力最强,其次为磴口,银川种源最差,而在300 mmol·L^-1NaCl下,金昌种源沙枣幼苗耐盐能力最强,其次为阿拉尔,银川种源最差。综合2个NaCl浓度的综合评价值,6个沙枣种源的耐盐能力排序为:阿拉尔 >金昌 >磴口 >盐池 >昌吉 >银川。[结论] 在中、重度盐渍土进行沙枣引种栽培时,适宜选择阿拉尔种源沙枣幼苗,而不适宜选择种植银川种源沙枣幼苗。

关键词: 沙枣, NaCl胁迫, 种源, 生长表现

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

中图分类号:

S718.43

杨升, 张华新, 杨秀艳, 陈秋夏, 武海雯. NaCl胁迫下不同种源沙枣的生长表现差异[J]. 林业科学, 2015, 51(9): 51-58.

Yang Sheng, Zhang Huaxin, Yang Xiuyan, Chen Qiuxia, Wu Haiwen. Differential Growth Performance of Elaeagnus angustifolia Provenances under NaCl Stress[J]. Scientia Silvae Sinicae, 2015, 51(9): 51-58.

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