Effects of atmospheric CO2 enrichment on phloem sap composition and root nitrogen accumulation in oilseed rape Ecophyslological response of Pinus koraiensis seedlings to elevated CO2 Physiological Effects of H2O2 and Ca2+ on Cold stressed Banana Seedlings Physiological Effects of H2O2 and Ca2+ on Cold stressed Banana Seedlings WATER METABOLISM AND CHANGES OF SEVERAL OSMOTICAIN LEAVES OF BETULA PLATYPHYLLA SEEDLINGS UNDER DROUGHT STRESS