REED(PHRAGMITES COMMUNIS TRIN.)BIOPRODUCTIVITY AND ITS RESPONSE TO INCREASED ATMOSPHERIC CO2 CONCENTRATIONS Influences of doubled CO2 concentration and drought stress on branch hydraulic traits in Pinus tabulaeformis saplings Effects of CO2 Doubling on Some Photosynthetic Functions of Spring Wheat Under Salt Stress Effects of Doubled CO2 Concentration on Structure of Vascular Tissues of Quercus liaotungensis The Response of Quercus liaotungensis to Doubled CO2 Concentration Effects of Doubled CO2 Concentration on the Content of Photosynthetic Pigments and PS II Functions of Jointing and Grouting in Setaria italica Effects of doubled CO2 concentration on lipid peroxidation and antioxidant system of cucumber seedlings under drought stresses Effects of Doubled-CO2 Concentration on Ultrastructure, Supramolecular Architecture and Spectral Characteristics of Chloroplasts from Wheat Effects of Doubled CO2 Concentration on Light Energy Absorption and Excitation Energy Distribution Between PS II and PS I in Chloroplasts of Weeping Willow and Eucommia Responses of Plant Dark Respiration to Doubled CO2 Concentration Effect of Doubled-CO2 Concentration on the Ultrastructure of Chloroplasts from Medicago sativa and Setaria italica