caa a22 4500 606220372 CHVBK 20210128101123.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s11104-015-2499-0 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2499-0 Drought priming at vegetative stage improves the antioxidant capacity and photosynthesis performance of wheat exposed to a short-term low temperature stress at jointing stage [Elektronische Daten] [Xiangnan Li, Henrik Topbjerg, Dong Jiang, Fulai Liu] Aim: To study the effects of multi-occurring stresses and the underlying mechanisms of cross-stress tolerance. Methods: Wheat plants were exposed to moderate drought priming (the leaf water potential reached ca. -0.8MPa) at the 5-6th leaf stage for 2weeks, and the physiological and yield responses of the drought-primed and non-primed plants to low temperature stress (4/ 2°C in the day/ night for 2days) at jointing stage were investigated. Results: Under low temperature stress, the primed plants possessed higher leaf relative water content and much activated antioxidant system and hence reduced the oxidative injury to the photosynthetic apparatus, resulting in greater photosynthetic rate and higher grain yield as compared with the non-primed plants. In addition, increase of the ABA concentrations in leaf was found closely associated with the enhanced anti-oxidant enzymes activity in the primed plants. Conclusions: Drought priming at vegetative stage improves cold tolerance of wheat at jointing stage via sustaining ROS homeostasis, during which ABA plays a key role in alleviating the effects of low temperature stress in the drought-primed plants. Springer International Publishing Switzerland, 2015 ABA nationallicence Cold nationallicence Drought nationallicence Priming nationallicence Water status nationallicence Wheat nationallicence ABA : abscisic acid nationallicence ANOVA : analysis of variance nationallicence A n : net photosynthetic rate nationallicence APX : ascorbate peroxidase nationallicence A sat : saturate net photosynthetic rate nationallicence CAT : catalase nationallicence CCI : chlorophyll content index nationallicence Ci : intercellular CO2 concentrations nationallicence FAA : free amino acid nationallicence Fv/Fm : maximum quantum efficiency of photosystem II nationallicence GPX : glutathione peroxidase nationallicence g s : stomatal conductance nationallicence H2O2 : hydrogen peroxide nationallicence J max : maximum photosynthetic electron transport rate nationallicence NBT : nitroblue tetrazolium nationallicence 1O2 : singlet oxygen nationallicence PPFD : photo-synthetic photon flux density nationallicence ROS : reactive oxygen species nationallicence RSWC : relative soil water content nationallicence SOD : superoxide dismutase nationallicence TSS : total soluble sugars nationallicence Vc max : maximum carboxylation velocity of Rubisco nationallicence Ψl : leaf water potential nationallicence Ψo : osmotic potential nationallicence Li Xiangnan Faculty of Science, Department of Plant and Environmental Sciences, University of Copenhagen, Højbakkegaard Allé 13, 2630, Taastrup, Denmark aut Topbjerg Henrik Faculty of Science, Department of Plant and Environmental Sciences, University of Copenhagen, Højbakkegaard Allé 13, 2630, Taastrup, Denmark aut Jiang Dong National Engineering and Technology Center for Information Agriculture/ Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, 210095, Nanjing, China aut Liu Fulai Faculty of Science, Department of Plant and Environmental Sciences, University of Copenhagen, Højbakkegaard Allé 13, 2630, Taastrup, Denmark aut Plant and Soil Springer International Publishing 393/1-2(2015-08-01), 307-318 0032-079X 393:1-2<307 2015 393 11104 https://doi.org/10.1007/s11104-015-2499-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2499-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Xiangnan Faculty of Science, Department of Plant and Environmental Sciences, University of Copenhagen, Højbakkegaard Allé 13, 2630, Taastrup, Denmark aut NATIONALLICENCE 700 1- Topbjerg Henrik Faculty of Science, Department of Plant and Environmental Sciences, University of Copenhagen, Højbakkegaard Allé 13, 2630, Taastrup, Denmark aut NATIONALLICENCE 700 1- Jiang Dong National Engineering and Technology Center for Information Agriculture/ Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Liu Fulai Faculty of Science, Department of Plant and Environmental Sciences, University of Copenhagen, Højbakkegaard Allé 13, 2630, Taastrup, Denmark aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 393/1-2(2015-08-01), 307-318 0032-079X 393:1-2<307 2015 393 11104