Review.- A Journey with Plant Cell Division: Reflection at My Halfway Stop.- Genetics.- Replication of Nuclear DNA.- Transformations of Cellular Pattern: Progress in the Analysis of Stomatal Cellular Complexes Using L-Systems.- Endoreduplication and Growth of Fleshy Fruits.- Physiology.- Adaptation to a Changing Environment: The Regulatory Role of Small RNAs.- Growth Responses of Trees to Arctic Light Environment.- Initial Events Associated with Virus PBCV-1 Infection of NC64A.- The Role of Auxin in Root-Symbiont and Root-Pathogen Interactions: From Development to Defense.- Molecular Mechanism of Water and Gas Transport Across Biological Membranes and Consequences for Plant Physiology.- Systematics.- Lichen Systematics: The Role of Morphological and Molecular Data to Reconstruct Phylogenetic Relationships.- Ecology.- Systemic Resistance Induction by Vascular and Airborne Signaling.- Roots: The Acquisition of Water and Nutrients from the Heterogeneous Soil Environment.- Re-Evaluation of Allometry: State-of-the-Art and Perspective Regarding Individuals and Stands of Woody Plants.- Quaking Aspen#x2019;s Current and Future Status in Western North America: The Role of Succession, Climate, Biotic Agents and Its Clonal Nature.- Quaternary Palaeoecology of East and Southeast Asia and of the Pacific Ocean.