Physiological responses of Populus sibirica to different irrigation regimes for reforestation in arid area
Keywords: سطح مقطع; ÏE0 (ÏE0Â =Â ET0Â /Â ABS); probability of an absorbed exciton that can move an electron beyond QAâ; Â ÏPO, (ÏPOÂ =Â FVÂ /Â Fm); maximum quantum yield of PSII photochemistry; Ï0 (Ï0Â =Â ET0Â /Â TR0); efficiency of a trapped exciton that an electron