Progress in Botany Vol. 84

Explorations into the Physiology and Ecology of Grassland Plants and Ecosystems: One Agronomist's Academic Journey.- Origins of Life: A Proposal for an Alternative Approach.- Regulatory Roles of Small RNAs in Forest Trees.- Serine Metabolic Networks in Plants.- Reactive Nitrogen Species in Plant Metabolism.- Molecular Regulation of Starch Metabolism.- Photorespiration and Improving Photosynthesis.- Molecular Regulation of Plant Responses to Shade.- Photoinhibition of PSI and PSII in Nature and in the Laboratory: Ecological Approaches.- Distribution and Functions of Calcium Mineral Deposits in Photosynthetic Organisms.- Soil Hydraulic Constraints on Stomatal Regulation of Plant Gas Exchange.- Tree Mortality: Revisited Under Changed Climatic and Silvicultural Conditions.- Pollen: A Key Tool for Understanding Climate, Vegetation, and Human Evolution.