【摘要】 以不同质量分数的盐(NaCl)胁迫对桤木Alnus cremastogyne8个无性系,在盆栽条件下测定叶片中丙二醛质量摩尔浓度、超氧化物歧化酶活性、可溶性蛋白质量分数和叶绿素质量分数的变化。结果表明:桤木无性系的耐盐性由于盐胁迫质量分数的不同以及自身的遗传特性而存在显著差异,在2 g.kg-1盐胁迫下,耐盐性从强到弱排序为X42>S17>M19>D5>N22>D10>A6>A1;在4 g.kg-1盐胁迫下,M19和S17耐盐性较强,A6最弱;而当盐质量分数达6 g.kg-1时,M19,S17和D5耐盐性较强,A6依然最弱。经过对生理指标以及生长状况的综合评价,初步筛选出M19和D52个耐盐性较好的桤木无性系,其次为S17。表2参13更多还原

【Abstract】 Eight Alnus cremastogyne clones,which simulated with different concentration of sodium chloride,were measured with four physiological indexes,including SOD activity,MDA content,chlorophyll content and soluble proteins content.The results showed that there were obvious differences of salt tolerance in eight Alnus cremastogyne clones because of the different concentrations of sodium chloride and their genetic characteristics.When the concentration of sodium chloride in soil remained2g·kg-1,the order of salt tolerance of eight clones was X 42,S 17,M 19,D 5,N 22,D 10,A 6 and A 1.When the concentration came to4g·kg-1,M 19 and S 17 became most tolerant to salt stress and A 6 was extremely sensitive to salt stress.When the concentration was6g·kg1,most tolerant clones were M 19,S 17 and D 5 clones,A 6 was still the last one.Through the analyze of the physiological indexes and growth phenology,M 19 and D 5 were more tolerant to salt stress among the eight clones.[Ch,2tab.13ref.]更多还原