摘要
采用IMAGING-PAM叶绿素荧光法,测定了宁夏地区种植的梭梭和白梭梭在离体脱水胁迫和光合日变化下的叶绿素荧光参数变化,以研究肉苁蓉寄主梭梭和白梭梭对地理环境的生态适应机制.结果表明:梭梭具有较高的光合作用性能,其光合电子传递活性(Fv/Fm)、光能转化效率(qP)和表观电子传递效率(ETR)等指标均高于白梭梭.离体脱水胁迫48 h,梭梭同化枝含水率及叶绿素荧光参数各指标均显著高于白梭梭.梭梭和白梭梭叶绿素荧光参数日变化差异较大,且呈现"V"型变化趋势.推测梭梭对水分及光照等环境因子变化的适应能力较白梭梭强,地理分布较广;白梭梭因受水分及光照等因子限制,地理分布较窄.
To evaluate the ecological adaptation mechanism of Haloxylon ammodendron and H. persicum from Ningxia,the host of Cistanche deserticola,the chlorophyll fluorescence under dehydration and diurnal variation was determined by IMAGING-PAM method. The results showed that H.ammodendron had higher photosynthetic electron transport activity（ Fv/ Fm）,photosynthetic efficiency（ qP）,and PSⅡ electron transport activity（ ETR） than H. persicum. After 48 h dehydration,the chlorophyll fluorescence and water-retaining property of H. ammodendron were significantly higher than those of H. persicum. The significant difference in diurnal variation between H. ammodendron and H. persicum was observed and a‘V＇trend was exhibited. It suggested that H. ammodendron had a stronger ability to adapt to the environment and had wider distribution,while H.persicum was limited by water and light and had narrow distribution.
出处
《应用生态学报》
CAS
CSCD
北大核心
2015年第8期2321-2328,共8页
Chinese Journal of Applied Ecology
基金
国家自然科学基金青年科学基金项目(81102748)
国家自然科学基金新疆联合基金项目(U1403324)
中央级公益性科研院所基本科研业务费专项资金项目(YZ2012-09)
国家科技支撑计划项目(2011BAI05B03)资助
关键词
梭梭
白梭梭
叶绿素荧光
脱水胁迫
日变化
Haloxylon ammodendron
Hpersicum
chlorophyll fluorescence
dehydration stress
diurnal variation
