NaCl胁迫下不同种源沙枣的生长表现差异  

Differential Growth Performance of Elaeagnus angustifolia Provenances under NaCl Stress

作　　者：杨升[1,2] 张华新[2] 杨秀艳[2] 陈秋夏[1] 武海雯[2] 

机构地区：[1]浙江省亚热带作物研究所,温州325005 [2]国家林业局盐碱地研究中心,北京100091

出　　处：《林业科学》2015年第9期51-58,共8页Scientia Silvae Sinicae

基　　金：中央公益科研院所基本科研业务费专项资金项目"重要耐盐碱树种多层次遗传改良与种质创新(CAFYBB2012009)";国家"十二五"科技支撑计划项目"耐盐碱生态林树木种质优选与示范(2011BAD38B0102)"

摘　　要：【目的】研究不同种源沙枣在Na Cl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Na Cl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-1Na Cl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-1Na Cl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-1Na Cl浓度下与对照之间差异不明显,在300mmol·L-1Na Cl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Na Cl浓度下的耐盐能力差异,结果显示,在150 mmol·L-1Na Cl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-1Na Cl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Na Cl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。[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＆#183;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＆#183;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＆#183;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＆#183;L-1 NaCl treatment. The root/shoot ratio was not obviously different under 150 mmol＆#183;L-1 NaCl compared with the control groups,but under the 300 mmol＆#183;L-1 NaCl concentration,the root/shoot ratio was significantly increased. Using＆amp;nbsp;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＆#183;L-1 NaCl concentration. However,JC p

关 键 词：沙枣 NACL胁迫 种源 生长表现 

分 类 号：S718.43[农业科学—林学]