脱水胁迫和光合日变化对梭梭和白梭梭叶绿素荧光参数的影响

应用生态学报

脱水胁迫和光合日变化对梭梭和白梭梭叶绿素荧光参数的影响

沈亮¹,陈君¹,刘赛¹,徐荣^1**,徐常青¹,刘同宁^2

(^1中国医学科学院北京协和医学院药用植物研究所, 北京 100193; ^2宁夏永宁县本草苁蓉种植基地, 银川 750100)

出版日期:2015-08-18 发布日期:2015-08-18

Influence of dehydration and diurnal variation on characteristics of chlorophyll fluorescence of leaves in Haloxylon ammodendron and H. persicum.

SHEN Liang¹, CHEN Jun¹, LIU Sa¹, XU Rong¹, XU Chang-qing¹, LIU Tong-ning²

(¹Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China; ²Yongning Plantation of Herba Cistanche, Yinchuan 750100, China)

Online:2015-08-18 Published:2015-08-18

摘要/Abstract

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(F_v/F_m)、光能转化效率(q_P)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.

Abstract: 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 (F_v/F_m), photosynthetic efficiency (q_P), 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.

沈亮1,陈君1,刘赛1,徐荣1**,徐常青1,刘同宁2. 脱水胁迫和光合日变化对梭梭和白梭梭叶绿素荧光参数的影响[J]. 应用生态学报.

SHEN Liang1, CHEN Jun1, LIU Sa1, XU Rong1, XU Chang-qing1, LIU Tong-ning2. Influence of dehydration and diurnal variation on characteristics of chlorophyll fluorescence of leaves in Haloxylon ammodendron and H. persicum.[J]. Chinese Journal of Applied Ecology.