This book on “Plant Proteomics: Concept and Applications” aims to highlight the diverse applications of Plant Proteomics in understanding plant molecular responses to various biotic and abiotic challenges. Recent advancement in mass spectrometry, complemented with the availability of more complete genome-sequence data and modern bioinformatics, has made proteomics a fast, sensitive and reliable technique to identify and characterize novel proteins and to follow changes in protein relative abundances under adverse environmental conditions.