\"Plant Biochemistry\" is an undergraduate textbook that places biochemistry in the context of the whole plant, from a cellular level to an ecological and environmental level. It is written from the perspective that biochemistry of plants is distinct from that of other organisms for two main reasons: they are autotrophic and sessile. Metabolic pathways are represented as route maps, showing how one reaction follows another, and emphasizing the dynamism and flexibility of plant biochemistry in the face of environmental challenges. The fact that these pathways do not operate in isolation is specifically highlighted throughout, reflected in the coverage of systems-based approaches that provide an understanding of the interlinking processes of biochemical and gene regulation.