摘要
为明确八棱海棠的耐盐特性,为其在盐碱地区的园林绿化应用提供科学依据,采用砂基培养法,研究八棱海棠幼苗在不同浓度NaCl胁迫下的生长量和部分生理指标的变化过程。结果表明:随着NaCl浓度的升高,八棱海棠的株高、茎粗、叶片含水量、叶绿素含量呈减少趋势;MDA含量和可溶性糖含量呈上升趋势;脯氨酸呈先下降后上升趋势,变化平缓。通过对外观形态的观测以及生理指标的综合分析,推断出八棱海棠的耐盐阈值、存活阈值为0.6%。
The study aimed to explore the salt resistant ability of Malus robusta Rehd.and provide the scientific basis for exploitation and utilization of Malus robusta Rehd.plants in saline-alkali land.The effects of different NaCl solutions on the growth and physiological indexes of Malus robusta Rehd.plants under sand-cultured were studied.The results showed that：with the increase of NaCl concentration,the shoot height,the stem diameter,the water content and the content of chlorophyll decreased continuously;MDA content and soluble sucrose increased;proline were declining at first and then increasing later,showing gently changes.The salt tolerant threshold and survival threshold of Malus robusta Rehd.plants was both deduced as 0.6% by observing visual form and analyzing physiological index.
出处
《中国农学通报》
CSCD
北大核心
2011年第28期130-134,共5页
Chinese Agricultural Science Bulletin
基金
省科技厅重大科技支撑计划项目"曹妃甸新区盐碱地耐盐植物筛选及绿化技术集成示范"(09227129Z)
河北省自然基金项目"耐盐性野生花卉种质资源的收集
评价与生理生态研究"(C2010001573)
关键词
八棱海棠
NACL胁迫
幼苗
生理指标
Malus robusta Rehd.
NaCl stress
seedlings
physiological indexes
