草业学报2016，Vol.25Issue(4)：81-90,10.DOI:10.11686/cyxb2015312
不同生境种源盐地碱蓬幼苗生长发育对盐分胁迫的响应和适应
Growth of Suaeda salsa tin response to salt stress in different habitats
摘要
Abstract
The influence of salt (0,200 and 400 mmol/L NaCl;0,200 and 400 mmol/L KCl)on growth,ion accumulation,chlorophyll fluorescence and gas exchange in leaves and antioxidant levels was assessed in Suae-da salsa plants from different habitats;intertidal and inland saline.200 mmol/L NaCl significantly increased shoot fresh weight and dry weight and succulence of S .salsa plants,while 400 mmol/L NaCl and all KCl treat-ments resulted in reduced growth.The concentrations of Na+ and Cl- were increased by NaCl treatments while the concentration of K+ significantly decreased.Similarly KCl treatments resulted in increasing K+ and Cl-concentrations accompanied by a marked reduction in Na+ concentration.The 200 mmol/L NaCl treatment had no effect on net photosynthesis,photosynthetic oxygen evolution rate,F v/F m and φPSⅡin S .salsa,but KCl treatments resulted in a significant decrease in these traits.In addition,200 mmol/L NaCl resulted in a signifi-cant increase in the SOD activity whereas 400 mmol/L NaCl and all KCl treatments markedly decreased SOD activity.Interestingly,the POD activity in S .salsa was significantly increased by all NaCl and KCl treat-ments.Shoot fresh weight and dry weight,succulence,net photosynthesis,photosynthetic oxygen evolution rate and ion concentration (Na+ and Cl- )of S .salsa plants from the intertidal zone were lower than that those from an inland saline areas.The salt stress effect of KCl was greater than that of NaCl.Saline stress in S .sal-sa plants from saline inland habitats was significantly greater than plants from an intertidal zone.关键词
盐地碱蓬/生境/盐分胁迫/生长/响应Key words
Suaeda salsa/habitats/salt stress/growth/response引用本文复制引用
彭斌,许伟,邵荣,封功能,石文艳..不同生境种源盐地碱蓬幼苗生长发育对盐分胁迫的响应和适应[J].草业学报,2016,25(4):81-90,10.基金项目
国家海洋局公益性行业科研专项（201505023）和江苏省盐城市农业科技创新专项引导资金项目（YK2014001）资助。 （）
