|本期目录/Table of Contents|

[1]石德成,赵可夫.NaCl、Na2CO3胁迫下星星草根际K+、Na+、Ca2+的生理行为[J].应用与环境生物学报,1997,3(02):112-118.
 Shi Decheng,Zhao Kefu.PHYSIOLOGICAL BEHAVIOR OF K+,Na+ AND Ca2+ IN THE RHIZOSPHERE OF NaCl AND Na2CO3 STRESSED PUCCINELLIA TENUIFLORA[J].Chinese Journal of Applied & Environmental Biology,1997,3(02):112-118.
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NaCl、Na2CO3胁迫下星星草根际K+、Na+、Ca2+的生理行为()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
3卷
期数:
1997年02期
页码:
112-118
栏目:
研究论文
出版日期:
1997-05-25

文章信息/Info

Title:
PHYSIOLOGICAL BEHAVIOR OF K+,Na+ AND Ca2+ IN THE RHIZOSPHERE OF NaCl AND Na2CO3 STRESSED PUCCINELLIA TENUIFLORA
作者:
石德成1 赵可夫2
1. 东北范大学生命科学学院, 长春 130024;
2. 山东师范大学逆境植物研究所, 济南 250014
Author(s):
Shi Decheng Zhao Kefu
1. Life Science College, Normal University, Changchun 130024;
2. Institute of Plant Stress, Shandong Normal University, Jinan 250014
关键词:
离子活度NaClNa2CO3星星草
Keywords:
ion activityNaClNa2CO3CalciumPuccinellia tenuiflora
摘要:
对星星草施加25~600mmol·L-1NaCl及12.5~200mmol·L-1Na2CO3的盐胁迫处理,分析其根际K+、Na+、Ca2+的生理行为。结果表明:Na2CO3对培养液中K+、Na+、Ca2+活度的影响大于NaCl,其中Na2CO3使Ca2+活度极度下降;营养液中K+、Na+、Ca2+活度与星星草根中K+、Na+含量密切相关,其中,根中K+、Na+含量与营养液中Ca2+活度和Na+活度平方之比即(Ca2+)/(Na+)2之间具有一致的曲线关系,根系环境中的(Ca2+)/(Na+)2对植物K+、Na+吸收有决定性作用。星星草地上部分K+、Na+含量与其根中K+、Na+含量也相关。根(DW)中K+在0.38~0.52mmol·g-1间可维持地上部分K+含量基本稳定。根中Na+含量较低时,地上部分Na+含量随根中含量升高而平缓上升。但根中Na+高至一定值时,地上部分Na+转而急剧上升,提示星星草在由根向上转运K+、Na+的过程中有一定调控作用。
Abstract:
The Plants of Puccinellia tenuiflora were stressed by the treatment with the nutrient solutions containing 25-600 mmol·L-1 NaCl or 12.5-200 mmol·L-1 Na2CO3. The physiological behavior of K+,Na+,and Ca2+ in the rhizosphere of the plants was analyzed. The effects of Na2CO3 on K+, Na+,and Ca2+ activities in the solutions were greater than those of NaCl. Na2CO3 made Ca2+ activity greatly decrease. K+ and Na+ contents in P. tenuiflora roots were closely related to K+, Na+,and Ca2+activities in the nutrient solutions. For the two salt-stresses,there was an identical curvilinear relationship between K+ and Na+ contents in the roots and Ca2+ activity/(Na+ activity)2 ratio in the nutrient solutions,which indicted that the K+ and Na+ absorptions of P. tenuiflora were closely related to Ca2+ activity/(Na+ activity)2 ratio in the rhizosphere. K+ and Na+ contents in P. tenuiflora shoots were related to K+ and Na+ contents in its roots. When K+ content in roots (DW) ranged between 0.38-0.52 mmol·g-1,that in shoots was not signifcantly changed, when Na+ content in roots was lower, that in shoots gently increased with the increasing of Na+ content in roots, but when Na+ content in the roots reached to a certain extent,that in shoots turned to a steep rise, which implied that the regulation and control of K+ and Na+ metabolism were also express in the transport course from roots to shoots.

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备注/Memo

备注/Memo:
收稿日期:1996-1-21;接受日期:1996-4-8。
基金项目:国家自然科学基金。
更新日期/Last Update: 1900-01-01