title: [Effects of NaCl stress on photosynthesis characteristics and fast chlorophyll fluorescence induction dynamics of Pistacia chinensis leaves].
abstract: By using fast chlorophyll fluorescence induction dynamics analysis technique (JIP-test), this paper studied the photosynthesis characteristics and fast chlorophyll fluorescence induction dynamics of 1-year old Pistacia chinensis seedlings under the stress of NaCl at the concentrations 0% (CK), 0.15%, 0.3%, 0.45%, and 0.6%. With the increasing concentration of NaCl, the contents of Chl a, Chl b, and Chl (a+b) in the seedlings leaves decreased, the Chl a/b ratio decreased after an initial increase, and the carotenoid content increased. The net photosynthetic rate (P(n)) and stomatal conductance (g(s)) decreased gradually with increasing NaCl concentration. The decrease of P(n) was mainly attributed to the stomatal limitation when the NaCl concentration was lower than 0.3%, and to the non-stomatal limitation when the NaCl concentration was higher than 0.3%. The trapped energy flux per RC (TR0/CS0), electron transport flux per RC (ET0/CS0), density of RCs (RC/CS0), and yield or flux ratio (psi(0) or phi(E0)) decreased, but the absorption flux per CS (ABS/CS0) and the K phase (W(k)) and J phase (V) in the O-J-I-P chlorophyll fluorescence induction curves increased distinctly, indicating that NaCl stress damaged the leaf oxygen-evolving complex (OEC), donor sides, and PS II reaction centers. When the NaCl concentration reached 0.3%, the maximum photochemical efficiency (F(v)/F(m)) and performance index (PI(ABS)) decreased 17.7% and 36.6%, respectively, as compared with the control.
authors.affiliation: College of Forestry, Agricultural University of Hebei, Baoding 071001, Hebei, China. lixuxin2003@yahoo.com.cn
authors.forename: Xu-Xin
authors.initials: XX
authors.lastname: Li
authors.affiliation: College of Forestry, Agricultural University of Hebei, Baoding 071001, Hebei, China.
authors.forename: Bing-Xiang
authors.initials: BX
authors.lastname: Liu
authors.affiliation: College of Landscape Architecture and Tourism, Agricultural University of Hebei, Baoding 071001, Hebei, China.
authors.forename: Zhi-Tao
authors.initials: ZT
authors.lastname: Guo
authors.affiliation: College of Forestry, Agricultural University of Hebei, Baoding 071001, Hebei, China.
authors.forename: Yue-Xia
authors.initials: YX
authors.lastname: Chang
authors.affiliation: College of Landscape Architecture and Tourism, Agricultural University of Hebei, Baoding 071001, Hebei, China.
authors.forename: Lei
authors.initials: L
authors.lastname: He
authors.affiliation: College of Landscape Architecture and Tourism, Agricultural University of Hebei, Baoding 071001, Hebei, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Chen
authors.affiliation: College of Landscape Architecture and Tourism, Agricultural University of Hebei, Baoding 071001, Hebei, China.
authors.forename: Bing-She
authors.initials: BS
authors.lastname: Lu
mesh_terms: D002734:Chlorophyll / Q000502:physiology*; D005453:Fluorescence; D010788:Photosynthesis / Q000187:drug effects*; D027927:Pistacia / Q000502:physiology*; D018515:Plant Leaves / Q000502:physiology; D012965:Sodium Chloride / Q000494:pharmacology*; D013312:Stress, Physiological
chemical_list: D002734:Chlorophyll; D012965:Sodium Chloride