A number of physiological processes are occurring inside the plants which are very delicate in nature and majority among them have not been fully understood yet. In the era of modern technologies various approaches have been employed in order to get a comprehensive look on various physiological processes occurring inside the plants. With the start of ?omics technologies, functional genomics becomes comprehensively understandable and practically appropriate. Since the classical genomic approaches have not cleared the confusions regarding the functional aspects of various cellular and metabolic processes, the modern trend shifts towards the other dynamic -omics fields. Proteomics, the study of quantitative totality of proteins of a cell, tissue or organism, while proving its mettle in structural and developmental aspects of plants and animal tissue can also be a very good eye lens through which we can comprehensively understand the functional aspects of the plants.The novel aim of this book is to get an overview that how proteomics helps us in understanding the very important plant physiological processes.