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生态学杂志 ›› 2011, Vol. 30 ›› Issue (01): 72-76.

• 研究报告 • 上一篇    下一篇

盐胁迫对翅碱蓬生长和渗透调节物质浓度的影响

李 悦1,2**,陈忠林1,王 杰1,徐苏南1,侯 伟1   

  1. 1辽宁大学环境学院, 沈阳 110036;2辽宁省重点学科与辽宁省高校污染控制与环境修复重点实验室,沈阳 110036
  • 出版日期:2011-01-08 发布日期:2011-01-08

Effects of salt stress on Suaeda heteroptera Kitagawa growth and osmosis-regulating substance concentration.

LI Yue1,2**, CHEN Zhong-lin1, WANG Jie1, XU Su-nan1, HOU Wei1   

  1. 1School of Environmental Science, Liaoning University, Shenyang 110036, China|2Key Discipline of Liaoning Province and Key Laboratory of Pollution Control and Environmental Remediation of Liaoning Universities, Shenyang 110036, China
  • Online:2011-01-08 Published:2011-01-08

摘要: 盐胁迫环境抑制植物的生长,不同的盐分浓度对植物的抑制伤害存在差异。本文探讨了翅碱蓬(Suaeda heteroptera Kitagawa)对盐生环境的生理生态适应机制,研究其在不同盐浓度下,株高、根长、鲜重、干重等生长指标以及相对含水量、游离脯氨酸、可溶性糖和蛋白质含量的变化情况。结果表明:盐分对翅碱蓬幼苗的抑制作用随盐浓度增加而加剧,低盐胁迫环境下,幼苗地上部分和根系的鲜重、干重和含水量均与对照没有显著性差异,但高盐环境严重影响翅碱蓬幼苗的生长,而且对地上部分的抑制作用大于根部;当盐浓度低于200 mmol·L-1时,盐分浓度与翅碱蓬叶片中游离脯氨酸含量、可溶性糖含量、可溶性蛋白质含量呈正相关;而盐分浓度高于300 mmol·L-1时与渗透调节物质含量呈负相关。

关键词: 长江口外, 赤潮, 羽状锋, 长江冲淡水转向, 上升流

Abstract: Salt stress inhibits plant growth, and its damage to plants differs with salt concentration. In this paper, a pot experiment was conducted to study the eco-physiological adaptability of Suaeda heteroptera Kitagawa under different salt conditions. The results showed that the inhibitory effect of salt on the growth of S. heteroptera seedlings increased with increasing salt concentration. Under low salinity stress, the fresh and dry weights and the water content of shoots and roots had no significant difference with the control; but under high salinity stress, the seedling growth was seriously affected, with more inhibition on shoots than on roots. When the NaCl concentration was lower than 200 mmol·L-1, there was a positive correlation between the free praline, soluble sugar, and protein contents in shoots and the salinity; when the NaCl concentration was higher than 300 mmol·L-1, there was a negative correlation between osmosis-regulating substance concentration and salinity.

Key words: Outer Changjiang estuary, Red tide, Plume front, Changjiang River diluted water, Upwelling