title: Photochemical properties in flag leaves of a super-high-yielding hybrid rice and a traditional hybrid rice (Oryza sativa L.) probed by chlorophyll a fluorescence transient.
abstract: Chlorophyll a fluorescence of flag leaves in a super-high-yielding hybrid rice (Oryza sativa L.) LYPJ, and a traditional hybrid rice SY63 cultivar with lower grain yield, which were grown in the field, were investigated from emergence through senescence of flag leaves. As the flag leaf matured, there was an increasing trend in photosynthetic parameters such as quantum efficiency of primary photochemistry ([Formula: see text] Po) and efficiency of electron transport from PS II to PS I (Ψ Eo). The overall photosynthetic performance index (PIABS) was significantly higher in the high-yielding LYPJ compared to SY63 during the entire reproductive stage of the plant, the same to MDA content. However, [Formula: see text] Po(=F V/F M), an indicator of the primary photochemistry of the flag leaf, did not display significant changes with leaf age and was not significantly different between the two cultivars, suggesting that PIABS is a more sensitive parameter than [Formula: see text] Po (=F V/F M) during leaf age for distinguishing between cultivars differing in yield.
authors.affiliation: College of Life Sciences, ShanXi Normal University, Linfen, 041004, Shanxi, People's Republic of China. mpzhang2006@163.com.
authors.forename: Meiping
authors.initials: M
authors.lastname: Zhang
authors.affiliation: College of Geography Sciences, ShanXi Normal University, Linfen, 041004, Shanxi, People's Republic of China.
authors.forename: YongJie
authors.initials: Y
authors.lastname: Shan
authors.affiliation: USDA-ARS, Robert W. Holly Center for Agriculture and Health, Cornell University, Ithaca, USA.
authors.forename: Leon
authors.initials: L
authors.lastname: Kochian
authors.affiliation: Bioenergetics Laboratory, University of Geneva, 1254, Jussy, Geneva, Switzerland.
authors.forename: Reto J
authors.initials: RJ
authors.lastname: Strasser
authors.affiliation: Key Lab of Biodiversity and Biotechnology of Jiangsu Province, College of Life Sciences, Nanjing Normal University, Nanjing, 210097, People's Republic of China. gxchen@njnu.edu.cn.
authors.forename: GuoXiang
authors.initials: G
authors.lastname: Chen
mesh_terms: D018533:Biomass; D002678:Chimera; D002734:Chlorophyll / Q000378:metabolism*; D000077194:Chlorophyll A; D004579:Electron Transport; D005453:Fluorescence; D012275:Oryza / Q000502:physiology* / Q000528:radiation effects; D010777:Photochemistry; D010788:Photosynthesis / Q000502:physiology*; D045331:Photosystem I Protein Complex / Q000378:metabolism*; D045332:Photosystem II Protein Complex / Q000378:metabolism*; D018515:Plant Leaves / Q000502:physiology* / Q000528:radiation effects
chemical_list: D045331:Photosystem I Protein Complex; D045332:Photosystem II Protein Complex; D002734:Chlorophyll; D000077194:Chlorophyll A
keywords: Chlorophyll a fluorescence transient; Flag leaf; Hybrid rice (Oryza sativa L.); JIP-test; Performance index; Photochemistry