混合盐碱胁迫对不同种源沙枣种子萌发的影响  

Effects of Mixed Saline-alkali Stress on Germination of Elaeagnus angustifolia L.Seeds From Difference Provenances

作　　者：毕春竹 肖可 郭子燕 蔡亚南 李悦[2] 李庆卫[2] BI Chunzhu;XIAO Ke;GUO Ziyan;CAI Yanan;LI Yue;LI Qingwei(School of Urban Construction,Guangzhou Huali College,Guangzhou,Guangdong 511325;College of Landscape Architecture,Beijing Forestry University,Beijing 100083)

机构地区：[1]广州华立学院城建学院,广东广州511325 [2]北京林业大学园林学院,北京100083

出　　处：《北方园艺》2021年第16期89-93,共5页Northern Horticulture

摘　　要：以宁夏、甘肃2种种源的沙枣(Elaeagnus angustifolia L.)种子为试材,将2种中性盐NaCl、Na_(2)SO_(4)和2种碱性盐NaHCO_(3)、Na_(2)CO_(3)按不同比例混合成3种组合A(NaCl∶Na_(2)SO_(4)=1∶1)、B(NaCl∶Na_(2)SO_(4)∶NaHCO_(3)∶Na_(2)CO_(3)=1∶1∶1∶1)、C(NaHCO_(3)∶Na_(2)CO_(3)=1∶1),设置5个浓度梯度(0%、0.3%、0.6%、0.9%、1.2%),比较了不同盐碱胁迫处理下沙枣种子的萌发情况,以期为沙枣种子萌发期的耐盐碱特性和沙枣的引种提供参考依据。结果表明:在低浓度混合盐碱胁迫下对种子的萌发有促进作用,表现为种子的发芽势、发芽率、发芽指数较对照组升高,随着混合盐碱浓度逐渐增加,其各指标呈下降趋势。不同类型盐碱对沙枣种子萌发的抑制程度不同,碱性盐胁迫>中性盐胁迫>混合盐碱胁迫。甘肃种源较宁夏种源表现出更好的耐盐碱性。Two kinds of Elaeagnus angustifolia L.seeds originated Ningxia,Gansu Provenances respectively were used as the experimental materials.Different proportions of two neutral salts(NaCl and Na_(2) SO_(4))and two alkaline salts(NaHCO_(3) and Na_(2)CO_(3))were mixed into 3 combinations A(NaCl∶Na_(2)SO_(4)=1∶1),B(NaCl∶Na_(2)SO_(4)∶NaHCO_(3)∶Na_(2)CO_(3)=1∶1∶1∶1),C(NaHCO_(3)∶Na_(2)CO_(3)=1∶1),and set 5 concentration gradients(0%,0.3%,0.6%,0.9%,1.2%),in order to provide reference for the salt tolerance of Elaeagnus angustifolia L.seeds germination and introduction of Elaeagnus angustifolia L..The germination of Elaeagnus angustifolia L.seeds under differernt saline-alkali mixed stresses were compared.The results showed that mixed saline-alkali stress at low concentration could promote the germination of seeds,and the germination potential,germination rate and germination index of seeds were higher than the control.With the gradual increase of concentration,its indexes showed a downward trend.Inhibitory extent were different under different salt-alkaline,alkali stress>salt stress>saline-alkali mixed stress.Gansu Provenance showed better saline-alkali tolerance than Ningxia provenance.

关 键 词：沙枣 混合盐碱胁迫 种子萌发 种源 

分 类 号：S662.9[农业科学—果树学]