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盐分对碱蓬幼苗离子含量,甜菜碱水平和BADH活性的效应
引用本文:刘家尧,赵可夫.盐分对碱蓬幼苗离子含量,甜菜碱水平和BADH活性的效应[J].Acta Botanica Sinica,1994,36(8):622-626.
作者姓名:刘家尧  赵可夫
作者单位:山东师范大学生物系!济南250014
摘    要:研究了盐生植物碱蓬(Suaeda salsa)生长在不同浓度的NaCl和KCl溶液中体内Na+ 、K+ 含量、甜菜碱水平和甜菜碱醛脱氢酶(BADH)活性的动态变化。NaCl处理96 小时后,碱蓬地上部K+ 含量低于对照,而Na+ 明显高于对照,并分别随外界盐度增加而升、降;KCl处理的植株,K+ 、Na+ 含量变化与NaCl处理的相反;甜菜碱水平和BADH 活性随外界NaCl浓度增加而升高,甜菜碱水平随处理时间延长而增大,KCl对甜菜碱水平和BADH 活性的效应类似NaCl。证明NaCl和KCl均能促进盐生植物碱蓬体内甜菜碱的积累,初步证明BADH 与甜菜碱的积累有关

关 键 词:碱蓬  离子含量  甜菜碱  甜菜碱醛脱氢酶

EFFECTS OF SALINITY ON ION CONTENTS, BETAINE LEVEL AND BETAINE ALDEHYDE DEHYDROGENASE ACTIVITY IN SEEPWEED (SUAEDA SALSA) SEEDLINGS
Authors:Liu Jia yao  Yi Yan jun and Zhao Ke fu
Abstract:The changes of ion contents, betaine levels and betaine aldehyde dehydrogenase (BADH) activity in seedling of halophyte seepweed (Suaeda salsa) were studied under different salinity (NaCl and KCl).Results showed that the K contents in seepweed seedlings grown in NaCl for 96 h decreased as the external salinity was increased comparing with the controls while the Na levels increased substantially.The levels of Na in seepweed treated with KCl fell, but K levels rose.The betaine levels and the BADH activity rose with the increase of external NaCl concentrations and the betaine levels increased as the time of the treatment was lengthened.The effects of KCl on the betaine levels and BADH activity were similar to these of NaCl.These results illustrated that NaCl and KCl can cause a large amounts of betaine accumulation in seepweed, and preliminary data suggest that BADH activity has played a role in betaine accumulation.
Keywords:Seepweed  Ion contents  Betaine  Betaine  aldehyde dehydrogenase activity  
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