盐胁迫下囊果碱蓬出苗状况及苗期抗盐性  

Seedling emergence and salt tolerance of Suaeda physophora Pall. under salt stress

作　　者：高奔[1] 宋杰[1] 刘金萍[1] 史功伟[1] 范海[1] 赵可夫[1] 王宝山[1] 

机构地区：[1]山东师范大学生命科学学院,植物逆境重点实验室,济南250014

出　　处：《生态学报》2009年第11期6131-6135,共5页Acta Ecologica Sinica

基　　金：山东省优秀中青年科学家科研奖励基金资助项目(2006BS06002);国家高技术研究发展“863”计划资助项目(2007AA091701)

摘　　要：研究了盐胁迫对囊果碱蓬出苗、幼苗生长、离子积累以及光合放氧速率的影响。囊果碱蓬生长的最适盐浓度在200mmol/LNaCl左右。高浓度NaCl(400mmol/L和600mmol/L)没有显著降低其出苗率,200mmol/LNaCl对出苗率具有促进作用。400mmol/L和600mmol/LNaCl显著降低了光合放氧速率。囊果碱蓬在高浓度NaCl处理下能够维持叶片较高的K+/Na+及含水量可能是其适应高盐生境的重要机制。We investigated the effect of salinity on seedling emergence, seedling growth, ion accumulation and the rate of photosynthetic oxygen evolution of Suaeda physophora Pall. The optimum salt concentration for growth of S. physophora was about 200 mmol/L NaCl. High concentrations of NaCl （400 and 600 mmol/L） did not decrease seedling emergence, while 200 mmol/L NaCl increased it. The rate of leaf photosynthetic oxygen evolution was decreased at 400 and 600 mmol/L NaCl. Maintaining a relatively high K^＋/Na^＋ ratio and water content in leaves under high concentrations of NaC may be an important mechanism for the adaptation of S. physophora to high salinity.

关 键 词：囊果碱蓬 NACL 出苗 生长 离子积累 光合放氧 K+/Na+ 

分 类 号：S793.9[农业科学—林木遗传育种]