伴生盐生植物脱盐效应对胡杨幼苗生理特性的影响  

Effects of desalination of associated halophytes on physiological characteristics of Populus euphratica seedlings

作　　者：文强 韩炜[1,2,3] 管文轲 武胜利[1,2,3] 孔凯凯[1,2,3] WEN Qiang;HAN Wei;GUAN Wenke;WU Shengli;KONG Kaikai(College of Geographical Science and Tourism,Xinjiang Normal University,Urumqi 830054,China;Key Laboratory of Lake Environment and Resources in Xinjiang Arid Region,Urumqi 830054,China;Forestry Science and Technology Promotion Office,Xinjiang Academy of Forestry Sciences,Urumqi 830000,China)

机构地区：[1]新疆师范大学地理科学与旅游学院,乌鲁木齐830054 [2]新疆干旱区湖泊环境与资源重点实验室,乌鲁木齐830054 [3]新疆林业科学院林业科技推广处,乌鲁木齐830000

出　　处：《浙江大学学报（农业与生命科学版）》2020年第2期209-216,共8页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：新疆维吾尔自治区科技支撑专项“塔里木河中下游胡杨生态修复研究与示范”(HY-2.3);新疆师范大学“十三五”校级重点学科(地理学)招标课题项目(17SDKD0704)。

摘　　要：为了筛选适用于胡杨幼苗最佳脱盐效果的盐生植物,以一年生胡杨幼苗为试验材料,采用盆栽控盐胁迫的方法,选取新疆常见盐生植物碱蓬(T1)、盐角草(T2)和盐节木(T3)作为伴生植物进行脱盐试验,设置5 g/L NaCl(B)和11 g/LNaCl(C)2个盐分处理,以及1个平行处理对照(CK0:0 g/L NaCl+胡杨)和3个各区组对照(CK1:0 g/L NaCl+碱蓬;CK2:0 g/L NaCl+盐角草;CK3:0 g/L NaCl+盐节木),通过测定胡杨幼苗叶片生理生化指标探讨脱盐作用对其影响规律。结果表明:伴生盐生植物对土壤具有明显的脱盐效果(P<0.05.),在5 g/L NaCl(B)条件下,T1脱盐率为26.8%,T2脱盐率为22.0%,T3脱盐率为14.2%,在11 g/LNaCl(C)条件下,T1脱盐率为14.9%,T2脱盐率为23.1%,T3脱盐率为19.7%。胡杨幼苗叶片脯氨酸(proline,Pro)与丙二醛(malondialdehyde,MDA)含量较各对照均总体呈上升趋势,但增加均不明显。在同一B盐分条件下,不同盐生植物处理的胡杨Pro含量变化为T3>T2>CK0>T1>CK3>CK2>CK1,MDA含量变化为T3>CK0>CK3>T2>T1>CK2>CK1;在同一C盐分条件下,不同盐生植物处理的胡杨Pro含量变化为T3>T1>T2>CK0>CK3>CK2>CK1,MDA含量变化为T3>T1>T2>CK0>CK3>CK2>CK1。抗氧化酶中超氧化物歧化酶和过氧化物酶活性与MDA含量呈线性相反的趋势。综合各项生理生态指标可见,3种伴生盐生植物在30 d内产生了较为显著的脱盐效果,其中:在5g/L NaCl条件下,伴生碱蓬对胡杨幼苗脱盐效果最佳;在11 g/L NaCl条件下,伴生盐角草脱盐效果最佳。To select suitable halophytes for best desalting effect of Populus euphratica seedlings,taking oneyear P.euphratica seedlings as the experimental materials,and Suaeda glauca(Bunge)Bunge(T1),Salicornia europaea L.(T2)and Halocnemum strobilaceum(Pall.)M.Bieb.(T3)of the common halophytes in Xinjiang as the associated plants,the seedlings of three P.euphratica and one associated plant were cultivated in pots treated with NaCl solutions of 5 g/L(B)and 11 g/L(C)and three replications,and a parallel treatment and three block treatments were set as the controls(CK0:0 g/L NaCl+P.euphratica;CK1:0 g/L NaCl+S.glauca;CK2:0 g/L NaCl+S.europaea;CK3:0 g/L NaCl+/H.strobilaceum),and then the physiological indexes of P.euphratica seedlings were determinated to explore the rule of desalting effect on it.The results showed that the associated halophytes had obvious desalting effect on soil(P<0.05).Under the condition of 5 g/L NaCl(B),the desalination rate of T1,T2 and T3 was 26.8%,22.0%and 14.2%,respectively.Under the condition of 11 g/L NaCl(C),the desalination rate of T1,T2 and T3 was 14.9%,23.1%and 19.7%,respectively.The contents of proline(Pro)and malondialdehyde(MDA)in P.euphratica seedlings increased on the whole as compared with the controls,but the increase was not obvious.Under the same B salt concentration,the changes of Pro and MDA contents under the different treatments were as follows:T3>T2>CK0>T1>CK3>CK2>CK1,and T3>CK0>CK3>T2>T1>CK2>CK1,respectively.Under the same C salt concentration,the changes of Pro and MDA contents under the different treatments were as follows:T3>T1>T2>CK0>CK3>CK2>CK1,and T3>T1>T2>CK0>CK3>CK2>CK1,respectively.Antioxidant activities of the superoxide dismutase(SOD)and peroxidase(POD)were linearly opposite to MDA content.In a word,based on the physiological and ecological indicators,the three associated halophytes produce a significant desalting effect in the 30 d.Under the condition of 5 g/L NaCl,the desalting effect of S.glauca on P.euphratica seedlings is the best;under the condition of 11 g/L Na

关 键 词：胡杨 盐生植物 脱盐作用 渗透物质 

分 类 号：S792.119[农业科学—林木遗传育种] Q945.78[农业科学—林学]