Plant Cell Biology: When, How and Why? -- 180 Years of the Cell: from Matthias Jakob Schleiden to the Cell Biology of the 21st Century -- Symbiotic Origin of Eukaryotic Nucleus -- From Cell Body to Neo-Energide -- A Brief History of Eukaryotic Cell Cycle Research -- A Short History of Plant Microtubule Research -- Plant Actin Cytoskeleton: New Functions from Old Scaffold -- Cell Wall Expansion: A Case Study of Biomechanical Process -- Apoplastic Barriers -- Structure and Function from the Historical Perspectives -- Evolving Views on Plastid Pleomorphy -- Communication within Plant Cells -- Plasmodesmata: A History of Conceptual Surprises -- Origins of Cellular Biosphere.