Book excerpt: With contributions from experts in various specialties, Plant-Environment Interactions discusses recent advances in cellular and molecular regulation of stress tolerance. This third edition reviews new research in stress signal perception, cellular mechanisms, and genetic manipulation of stress tolerance for each individual stress. It addresses how to evaluate the level of plant tolerance to stress as well as how to link mechanisms identified through analysis of plant-environment interaction to producing stress-tolerant germplasm through biotechnology and traditional breeding. It also examines environmental stresses limiting plant productivity in agriculture, horticulture, and forestry.