title: Waterlogging pretreatment during vegetative growth improves tolerance to waterlogging after anthesis in wheat.
abstract: The interaction of multiple waterlogging events during vegetative growth (at the seven- and nine-leaf stage, and at heading) to a waterlogging event during the generative growth stage was studied in wheat (Triticum aestivum L. cv. Yangmai 9). Waterlogging before anthesis was found to effectively enhance tolerance to a waterlogging event after anthesis, as indicated by: (1) increasing net photosynthetsis (P(N)), stomatal conductance (g(s)) and transpiration (Tr) and maintaining high SPAD (soil plant analysis development) values; (2) enhancing use-efficiency of absorbed light energy in the stressed plants due to high maximum and actual quantum yield (F(v)/F(m), Φ(PSII)); (3) increasing activities of superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT); (4) enhancing dry matter accumulation after anthesis and its contribution to grain mass, which further resulting in significantly improved grain yields. The results indicate that hardening by waterlogging applied before anthesis can effectively improve the tolerance of wheat to waterlogging events occurring during the generative growth stage.
authors.affiliation: Key Laboratory of Crop Growth Regulation, Ministry of Agriculture/Hi-Tech Key Laboratory of Information Agriculture of Jiangsu Province, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China.
authors.forename: Chengyong
authors.initials: C
authors.lastname: Li
authors.forename: Dong
authors.initials: D
authors.lastname: Jiang
authors.forename: Bernd
authors.initials: B
authors.lastname: Wollenweber
authors.forename: Yun
authors.initials: Y
authors.lastname: Li
authors.forename: Tingbo
authors.initials: T
authors.lastname: Dai
authors.forename: Weixing
authors.initials: W
authors.lastname: Cao
mesh_terms: D000222:Adaptation, Physiological; D060387:Ascorbate Peroxidases; D002374:Catalase / Q000378:metabolism; D035264:Flowers / Q000254:growth & development; D010544:Peroxidases / Q000378:metabolism; D010788:Photosynthesis; D012987:Soil; D013312:Stress, Physiological; D013482:Superoxide Dismutase / Q000378:metabolism; D014908:Triticum / Q000254:growth & development / Q000502:physiology*; D014867:Water / Q000378:metabolism*
chemical_list: D012987:Soil; D014867:Water; D010544:Peroxidases; D060387:Ascorbate Peroxidases; D002374:Catalase; D013482:Superoxide Dismutase