title: [Influence of dehydration and diurnal variation on characteristics of chlorophyll fluorescence of leaves in Haloxylon ammodendron and H. persicum].
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 (Fv/Fm), photosynthetic efficiency (qP), and PS II 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. ammo- dendron 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.
authors.forename: Liang
authors.initials: L
authors.lastname: Shen
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: Sai
authors.initials: S
authors.lastname: Liu
authors.forename: Rong
authors.initials: R
authors.lastname: Xu
authors.forename: Chang-qing
authors.initials: CQ
authors.lastname: Xu
authors.forename: Tong-ning
authors.initials: TN
authors.lastname: Liu
mesh_terms: D000222:Adaptation, Physiological; D027703:Amaranthaceae / Q000502:physiology*; D002734:Chlorophyll / Q000737:chemistry*; D002940:Circadian Rhythm; D003681:Dehydration; D004579:Electron Transport; D005453:Fluorescence; D008027:Light; D010788:Photosynthesis; D018515:Plant Leaves / Q000737:chemistry*; D014867:Water
chemical_list: D014867:Water; D002734:Chlorophyll