caa a22 4500 605481067 CHVBK 20210128100419.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s11099-015-0100-y doi (NATIONALLICENCE)springer-10.1007/s11099-015-0100-y Impact of arbuscular mycorrhizal fungi on the growth, water status, and photosynthesis of hybrid poplar under drought stress and recovery [Elektronische Daten] [T. Liu, M. Sheng, C. Wang, H. Chen, Z. Li, M. Tang] Poplars (Populus spp.) are widely used in the pulp and paper industry and as bioenergy resources. Poplars require a large amount of water for biomass accumulation and lack of water is a limiting factor for poplar growth. Arbuscular mycorrhizal (AM) fungi have been previously reported to afford some plant species with greater resistance to drought stress. However, the effects of AM fungi on hybrid poplar under drought stress and recovery have not been studied. The main aim of this study was to evaluate the effects of the AM fungus, Rhizophagus irregularis, on the growth, water status, chlorophyll (Chl) content and fluorescence, and photosynthesis of poplar seedlings. The experiment was divided into three stages. At each stage of the experiment, the seedlings were subjected to a different watering regime: well-watered (prior stress), drought, and then rewatering (recovery). Measurements were taken at the end of each stage of the experiment. The results showed that mycorrhizal plants had a higher net photosynthetic rate and Chl fluorescence compared with nonmycorrhizal plants, regardless of the stage. Mycorrhizal and nonmycorrhizal plants showed different responses to drought stress: mycorrhizal plants showed better water-use efficiency and water uptake under drought stress conditions. In general, the poplar seedlings that formed the AM symbiosis with R. irregularis showed enhanced growth and reduced loss of biomass during the drought stress compared with the nonmycorrhizal seedlings. The Institute of Experimental Botany, 2015 drought tolerance nationallicence gas exchange nationallicence nonphotochemical quenching nationallicence photosynthetic capacity nationallicence relative water content nationallicence AM : arbuscular mycorrhizal nationallicence Chl : chlorophyll nationallicence C i : intercellular CO2 concentration nationallicence DS : drought stress nationallicence E : transpiration rate nationallicence F0 : the minimal fluorescence in dark-adapted state nationallicence F0′ : the minimal fluorescence in light-adapted state nationallicence Fm : the maximal fluorescence in dark-adapted state nationallicence Fm′ : the maximal fluorescence in light-adapted state nationallicence Fs : the steady-state fluorescence nationallicence Fv/Fm : the maximal quantum yield of PSII in dark-adapted state nationallicence g s : stomatal conductance nationallicence P N : net photosynthetic rate nationallicence qN : nonphotochemical quenching coefficient nationallicence qP : photochemical quenching coefficient nationallicence REC : recovery nationallicence RWC : relative water content nationallicence WUE : water-use efficiency nationallicence WW : well-watered nationallicence ΦPSII : effective quantum yield of PSII nationallicence Liu T. State Key Laboratory of Soil Erosion and Arid-land Farming on the Loess Plateau, Northwest A&F University, 712100, Yangling, Shaanxi, China aut Sheng M. College of Forestry, Northwest A&F University, 712100, Yangling, Shaanxi, China aut Wang C. College of Forestry, Northwest A&F University, 712100, Yangling, Shaanxi, China aut Chen H. College of Forestry, Northwest A&F University, 712100, Yangling, Shaanxi, China aut Li Z. College of Life Sciences, Northwest A&F University, 712100, Yangling, Shaanxi, China aut Tang M. State Key Laboratory of Soil Erosion and Arid-land Farming on the Loess Plateau, Northwest A&F University, 712100, Yangling, Shaanxi, China aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/2(2015-06-01), 250-258 0300-3604 53:2<250 2015 53 11099 https://doi.org/10.1007/s11099-015-0100-y 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/s11099-015-0100-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu T. State Key Laboratory of Soil Erosion and Arid-land Farming on the Loess Plateau, Northwest A&F University, 712100, Yangling, Shaanxi, China aut NATIONALLICENCE 700 1- Sheng M. College of Forestry, Northwest A&F University, 712100, Yangling, Shaanxi, China aut NATIONALLICENCE 700 1- Wang C. College of Forestry, Northwest A&F University, 712100, Yangling, Shaanxi, China aut NATIONALLICENCE 700 1- Chen H. College of Forestry, Northwest A&F University, 712100, Yangling, Shaanxi, China aut NATIONALLICENCE 700 1- Li Z. College of Life Sciences, Northwest A&F University, 712100, Yangling, Shaanxi, China aut NATIONALLICENCE 700 1- Tang M. State Key Laboratory of Soil Erosion and Arid-land Farming on the Loess Plateau, Northwest A&F University, 712100, Yangling, Shaanxi, China aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/2(2015-06-01), 250-258 0300-3604 53:2<250 2015 53 11099