caa a22 4500 605481008 CHVBK 20210128100418.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s11099-015-0131-4 doi (NATIONALLICENCE)springer-10.1007/s11099-015-0131-4 Physiological responses of halophytic C4 grass Aeluropus littoralis to salinity and arbuscular mycorrhizal fungi colonization [Elektronische Daten] [R. Hajiboland, F. Dashtebani, N. Aliasgharzad] The halophytic C4 grass, Aeluropus littoralis, was cultivated under low (50 mM) and high (200 mM) NaCl salinity and inoculated with the arbuscular mycorrhizal fungi (AMF) Claroideoglomus etunicatum in a sand culture medium for 20 weeks. Shoot and root dry mass increased under salinity conditions up to 24 and 86%, respectively. Although the root colonization rate significantly decreased in the presence of salt, AMF-colonized (+AMF) plants had higher biomass compared with plants without AMF colonization (-AMF) only under saline conditions. Net CO2 assimilation rate increased significantly by both salinity levels despite stable stomatal opening. In contrast, AMF-mediated elevation of the net CO2 assimilation rate was associated with a higher stomatal conductance. Unexpectedly, leaf activity of phosphoenolpyruvate carboxylase decreased by salinity and AMF colonization. Transpiration rate was not affected by treatments resulting in higher water-use efficiency under salinity and AMF conditions. Concentrations of soluble sugars and free α-amino acids increased by both salinity and AMF treatments in the shoot but not in the roots. Proline concentration in the leaves was higher in the salt-treated plants, but AMF colonization did not affect it significantly. Leaf activity of nitrate reductase increased by both salinity and AMF treatments. Mycorrhizal plants had significantly higher Na+ and K+ uptake, while Ca2+ uptake was not affected by salt or AMF colonization. The ratio of K+/Na+ increased by AMF in the shoot while it decreased in the roots. Leaf osmotic potential was lowered under salinity in both +AMF and -AMF plants. Our results indicated that higher dry matter production in the presence of salt and AMF could be attributed to higher CO2 and nitrate assimilation rates in the leaves. Higher leaf accumulation of soluble sugars and α-amino acids but not proline and elevated water-use efficiency were associated with the improved growth of A. littoralis inoculated with AMF. The Institute of Experimental Botany, 2015 carotenoids nationallicence chlorophyll content nationallicence compatible solute nationallicence gas exchange nationallicence growth parameters nationallicence water relations nationallicence AMF : arbuscular mycorrhizal fungi nationallicence C a : ambient CO2 concentration nationallicence Car : carotenoids nationallicence Chl : chlorophyll nationallicence C i : intercellular CO2 concentration nationallicence DM : dry mass nationallicence E : transpiration rate nationallicence FM : fresh mass nationallicence g s : stomatal conductance nationallicence NR : nitrate reductase nationallicence PEPC : phosphoenolpyruvate carboxylase nationallicence P N : net CO2 assimilation rate nationallicence TM : turgid mass nationallicence WUE : water-use efficiency nationallicence Hajiboland R. Center of Excellence for Biodiversity, University of Tabriz, 51666-14779, Tabriz, Iran aut Dashtebani F. Plant Science Department, University of Tabriz, 51666-14779, Tabriz, Iran aut Aliasgharzad N. Center of Excellence for Biodiversity, University of Tabriz, 51666-14779, Tabriz, Iran aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/4(2015-12-01), 572-584 0300-3604 53:4<572 2015 53 11099 https://doi.org/10.1007/s11099-015-0131-4 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/s11099-015-0131-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hajiboland R. Center of Excellence for Biodiversity, University of Tabriz, 51666-14779, Tabriz, Iran aut NATIONALLICENCE 700 1- Dashtebani F. Plant Science Department, University of Tabriz, 51666-14779, Tabriz, Iran aut NATIONALLICENCE 700 1- Aliasgharzad N. Center of Excellence for Biodiversity, University of Tabriz, 51666-14779, Tabriz, Iran aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/4(2015-12-01), 572-584 0300-3604 53:4<572 2015 53 11099