My research centers on the effects of global environmental change on plant physiology and productivity at the cell, organismal and ecosystem levels. My specific interests are: (1). Effects of elevated atmospheric carbon dioxide (CO2) on plant respiration; (2). The interaction of other environmental factors, e.g. soil nutrients, with elevated CO2 in affecting carbon sequestration at the individual and ecosystem levels; (3). Physiological adaptation of plants to their changing environments; (4). How will global change affect male and female individuals of dioecious species; (5). Statistical synthesis of published results using meta-analysis. My research is interdisciplinary in nature and aims at understanding the responses of plants to the abiotic factors.