title: Chlorophyll Fluorescence in Leaves of Ficus tikoua Under Arsenic Stress.
abstract: A greenhouse culture experiment was used to quantify effects of arsenic (As) stress on the growth and photochemical efficiency of Ficus tikoua (F. tikoua). Results showed growth of F. tikoua leaves was significantly inhibited at As concentrations higher than 80 μmol/L in solution. Root arsenic concentration was significantly higher than that in stem and leaf. The 320 and 480 μmol/L As concentrations in solution resulted in significant decreases in maximum quantum efficiency of photosystem II (PSII) (Fv/Fm), variable to initial chlorophyll fluorescence (Fv/Fo), and quantum yield of PSII electron transport (Y(II)) of F. tikoua leaves, whereas significantly higher non-photochemical quenching of fluorescence and photochemical quenching of fluorescence values were found at 160, 320 and 480 μmol/L As concentrations in solution, implying that PSII reaction centers were damaged at high As concentrations and that F. tikoua eliminates excess energy stress on the photochemical apparatus to adapt to As stress.
authors.affiliation: School of Metallurgical Science and Environment, Central South University, Changsha, 410083, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Metallurgical Science and Environment, Central South University, Changsha, 410083, China.|Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, China.
authors.forename: Liyuan
authors.initials: L
authors.lastname: Chai
authors.affiliation: School of Metallurgical Science and Environment, Central South University, Changsha, 410083, China. yangzh@csu.edu.cn.|Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, China. yangzh@csu.edu.cn.
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Yang
authors.affiliation: School of Metallurgical Science and Environment, Central South University, Changsha, 410083, China.
authors.forename: Hussani
authors.initials: H
authors.lastname: Mubarak
authors.affiliation: School of Metallurgical Science and Environment, Central South University, Changsha, 410083, China.|Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, China.
authors.forename: Chongjian
authors.initials: C
authors.lastname: Tang
mesh_terms: D001151:Arsenic / Q000493:pharmacokinetics / Q000633:toxicity*; D002734:Chlorophyll / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D004579:Electron Transport / Q000187:drug effects; D030681:Ficus / Q000254:growth & development / Q000378:metabolism*; D005453:Fluorescence; D010788:Photosynthesis / Q000187:drug effects; D045332:Photosystem II Protein Complex / Q000378:metabolism; D018515:Plant Leaves / Q000187:drug effects* / Q000378:metabolism*; D018517:Plant Roots / Q000378:metabolism; D018547:Plant Stems / Q000378:metabolism
chemical_list: D045332:Photosystem II Protein Complex; D002734:Chlorophyll; D001151:Arsenic
keywords: Arsenic resistant; Arsenic toxicity; Photochemistry quenching; Photosynthesis