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碱胁迫对羊草和向日葵的影响
引用本文:颜宏,赵伟,盛艳敏,石德成,周道玮.碱胁迫对羊草和向日葵的影响[J].应用生态学报,2005,16(8):1497-1501.
作者姓名:颜宏  赵伟  盛艳敏  石德成  周道玮
作者单位:1. 东北师范大学生命科学学院,长春,130024
2. 长春空军航空大学,长春,130022
3. 长春师范学院生物系,长春,130021
基金项目:国家自然科学基金项目(30270139),博士点基金资助项目(305046000).
摘    要:以抗盐碱性较强的单子叶植物羊草和双子叶植物向日葵为材料,对其进行中性盐、碱性盐和各种中碱性混合盐等胁迫处理,以日相对生长率(RGR)为主要胁变指标分析各种胁迫的特点及其相互关系.结果表明,碱性盐胁迫与中性盐胁迫实际上是既相关又有本质区别的两种不同胁迫,应该将碱性盐胁迫定义为碱胁迫,而将中性盐胁迫定义为盐胁迫.碱胁迫区别于盐胁迫的关键是高pH值.以缓冲量作为碱胁迫的胁强指标,而以盐度作为盐胁迫的胁强指标较为理想.盐碱混合胁迫时,两种胁迫表现出协同效应.

关 键 词:碱胁迫  盐胁迫  缓冲量  pH值  羊草  向日葵
文章编号:1001-9332(2005)08-1497-05
收稿时间:2004-09-15
修稿时间:2004年9月15日

Effects of alkali?stress on Aneurolepidium chinense and Helianthus annuus
YAN Hong,ZHAO Wei,SHENG Yanmin,SHI Decheng,Zhou Daowei.Effects of alkali?stress on Aneurolepidium chinense and Helianthus annuus[J].Chinese Journal of Applied Ecology,2005,16(8):1497-1501.
Authors:YAN Hong  ZHAO Wei  SHENG Yanmin  SHI Decheng  Zhou Daowei
Institution:College of Life Science, Northeast Normal University, Changchun 130024, China. yanh603@nenu.edu.cn
Abstract:Employing monocotyledon Aneurolepidium chinense and dicotyledon Helianthus annuus,the two species with high alkali-saline resistance as test materials,and stressing them with neutral,alkalic,and mixed salts,this paper studied the characteristics of various stresses and their interrelations,with relative growth rate (RGR) as the main strain index.The results showed that under the same concentration,alkalic salt had a stronger effect than neutral salt,and the RGR of A.chinense and H.annuus was decreased with increasing salt concentration under the same kind of salt stress and pH conditions.When the pH was higher,the RGR decreased more obviously.In addition,the proline and citric acid contents in test plants were increased with increasing stress.The transformation of proline in A.chinense was greater than that in H.annuus,while that of citric acid was in adverse.In a word,alkalic salt stress was different from neutral salt stress in stressing plants and in plant responses.Alkalic salt stress and neutral salt stress were actually two distinct kinds of stresses.The former was better called "alkali-stress",while "salt-stress" only meant neutral salt stress.The key difference between them was their different pH value.It was reasonable to consider the buffer capacity as the strength value of alkali-stress,and the salinity as the strength value of salt-stress.An interactive effect between salt-stress and alkali-stress could be seen under mixed saline and alkali stress.
Keywords:Alkali-stress  Salt-stress  Buffer capacity  pH  Aneurolepidium chinense  Helianthus annuus
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