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两不同种源马蔺在NaCl胁迫及解胁恢复中的生长及无机离子响应

发表时间:2015-10-15  浏览量:1202  下载量:332
全部作者: 李品芳,张彪,郭世文,何梦,樊奋成
作者单位: 中国农业大学资源与环境学院,植物?土壤相互作用教育部重点实验室;河南农业大学资源与环境学院;北京顺鑫绿洲锦绣园林工程有限公司
摘 要: 实验选择新疆和北京两种源地的马蔺[Iris lactea Pall. var. chinensis (Fisch.) Koidz.]为研究对象,采用水培的方法,设置NaCl盐胁迫(140,280 mmol·L-1)及解除后的恢复处理,交互组合后共12个处理区。通过分析NaCl胁迫12 d及恢复12 d后两种源马蔺生长及无机离子含量的胁迫-恢复效应,探讨两种源马蔺的耐盐性。结果表明,新疆源马蔺生长受盐分抑制较轻,盐分胁迫解除后生长恢复迅速。盐分对马蔺地上部含水量的抑制性大于根部,且北京源马蔺地上部的水分亏缺大于新疆源。新疆源马蔺比北京源的有较强的离子选择性,主要体现在盐分胁迫期的运移过程中。解除盐分胁迫恢复12 d后,新疆源马蔺地上部K+含量回升程度大于北京源的。综合判断新疆源马蔺的耐盐性强于北京源马蔺。
关 键 词: 植物学;耐盐性;马蔺;种源;NaCl胁迫和解胁恢复;无机离子
Title: Responses of growth and inorganic ions of two Chinese Irises from different origins in NaCl stress and recovery process
Author: LI Pinfang, ZHANG Biao, GUO Shiwen, HE Meng, FAN Fencheng
Organization: Key Laboratory of Plant-Soil Interactions, Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University; College of Resources and Environment Sciences, Henan Agricultural University; Beijing Shunxin Oasis Jinxiu Garden Engineering Co. Ltd.
Abstract: In this study, seeds of Chinese iris [Iris lactea Pall. var. chinensis (Fisch.) Koidz.] were collected in Beijing and Xinjiang. Their seedlings were then put into hydroponic experiments with two concentrations of NaCl stress (140, 280 mmol·L-1) and subsequent recovery treatments i. e. a total of 12 plots after interactive combination. By analyzing the stress-recovery effect of growth and ionic contents to study the salt tolerances of two irises, it is found that the growth inhibition of Xinjiang iris by salt is lighter, thus the growth rate after subsequent recovery treatment is faster. The inhibition of NaCl of the water content of shoots is greater than those of roots, and the water deficit of Beijing iris is greater than that of Xinjiang iris. Xinjiang iris has stronger ion selectivity than that of Beijing iris, which is mainly shown in transportation of ions during salt stress period. After recovery, the level of increment of K+ content in the shoots of Xinjiang iris is higher than that of Beijing iris. The salt tolerance of Xinjiang iris is greater than that of Beijing iris.
Key words: botany; salt tolerance; Iris lactea Pall. var. chinensis (Fisch.) Koidz.; provenance; NaCl stress-recovery treatments; inorganic ions
发表期数: 2015年10月第19期
引用格式: 李品芳,张彪,郭世文,等. 两不同种源马蔺在NaCl胁迫及解胁恢复中的生长及无机离子响应[J]. 中国科技论文在线精品论文,2015,8(19):2040-2048.
 
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