Relationship between photo-inhibition of photosynthesis and reactive oxygen species in leaves of poplars suffering root osmotic stress The relationship between the activities of protecting enzymes and water parameters from pressure-volume curves in six tree species THE CHANGE IN CARBOHYDRATE CONTENT AND PROTECTING ENZYME ACTIVITIES IN ROOT OF ALPINE FORAGE RELATED TO ITS ADAPTATION TO COLD IN SPRING Effect of Weak Light on the Peroxidation of Membrane-Lipid of Cherry Leaves Effects of 6-BA and AsA on photosynthesis photoinhibition of attached poplar leaves under osmotic stress of root Genetic Analysis of Biochemical Traits in Short Season Upland Cotton with No Premature Senescence