高盐碱胁迫下野生大豆(Glycine soja)体内离子积累的差异

在总含量3%高盐碱原土盆栽条件下，对搜集于津唐盐碱地895份野生大豆植株进行耐盐碱性评价。通过测定203株死亡及收获植株茎、叶中Na⁺、Cl^–、K⁺、Ca²⁺、Mg²⁺的含量，分析高盐碱胁迫下野生大豆植株离子含量的分布及野生大豆植株死亡和成熟时体内离子积累程度，并探讨耐盐碱型野生大豆的耐性机制。结果表明，野生大豆植株在营养生长期间，盐碱胁迫致死植株茎、叶无机离子含量在不同存活时间组间并未达显著水平，Na⁺和Cl^–积累达到一定含量即出现死亡现象，致死植株茎中Na⁺和Cl^–离子范围分别为3.239~4.682和4.639~6.328，叶中分别为1.754~2.349和4.126~5.073；能够存活到成熟的耐盐碱型野生大豆植株茎叶Na⁺和Cl^–含量存在低中高3种类型。高耐型野生大豆茎、叶平均Na⁺和Cl^–含量显著低于低耐盐型，且茎中K⁺和叶中Ca²⁺和Mg²⁺含量较高。在高耐型野生大豆植株茎叶中也存在Na⁺和Cl^–离子含量高水平和低水平两种类型，推测野生大豆可能存在两种耐盐碱机制，其一为高耐受性，其二为低吸收性。

Difference of Ion Accumulation in Wild Soybean (Glycine soja) under High Saline-alkali Stress

We used pot cultivation with coastal soil containing total 3% salinity to identify the salt tolerance of 895 wild soybean plants collected in the Tianjin and Tangshan regions of China,and to determine Na+,Cl-,K+,Ca2+,Mg2+ contents in the stems and leaves of 203 plants that died at different stages and at maturity.The aim was to evaluate the differences of ion accumulations in the dead and survival wild soybean plants,and to discuss the mechanism of salt tolerance.The results showed that there were no signif...