酸胁迫对结缕草种子萌发及其胚生长的影响  

Effects of Acid Stress on the Germination and Embryo Growth of Zoysia japonica Seed

作　　者：张学勇[1] 张绵[1] 都华[1] 毛伟伟[1] 何哲[1] 黄金东[1] 

机构地区：[1]辽宁大学生态环境研究所,沈阳110036

出　　处：《种子》2010年第11期18-20,共3页Seed

基　　金：辽宁省教育厅科学研究项目资助(项目编号:2008230)

摘　　要：用柠檬酸(C6H8O7.H2O)和柠檬酸钠(C6H5Na3O7.2 H2O)两种试剂配制7个pH值梯度的酸度处理缓冲溶液,对结缕草种子进行酸胁迫发芽试验。结果表明,结缕草种子的发芽率、发芽势、活力指数以及胚芽和胚根长度均极显著地低于对照,但随着酸度的增加(pH值的降低),结缕草种子的发芽率、发芽势、活力指数以及胚芽长度又整体呈增加的趋势,达到显著或极显著水平的差异。溶液中Na+的毒害效应及渗透胁迫作用可能是结缕草种子萌发的最大致害因素,而溶液pH值的影响则居其次。在酸性土壤上建植结缕草草坪,不能以土壤的pH值为单一参考指标,还要考虑到土壤的盐分成分,据此建植或实施必要的土壤改良措施。The buffer solutions of C6H8O7·H2O and C6H5Na3O7·2H2O with the different pH were used for acid stress to measure and analyse the germinality and the growth of radical and plumule of Zoysia japonica seeds.The results showed that the seed germination percentage,germination energy,vigor index and length of radical and plumule were lower and the mean germination time was longer than that of CK extreme markedly,respectively.But the germination percentage,germination energy,vigor index and length of plumule markedly or extreme markedly increased with the falling of pH,respectively.Those contrary results indicated that the poison effect and osmosis intimidation of Na＋ in the buffer solutions primarily affected the seeds of Zoysia japonica and the effect of solution pH was minor.Not only soil pH but also salt compositions were considered to building Zoysia japonica turf or soil improvement in acid soil.

关 键 词：结缕草 酸胁迫 种子萌发 胚根 胚芽 

分 类 号：S54[农业科学—作物学]