This book sheds new light on ways to alleviate biotic and abiotic stress in plants, using signaling molecules of plant growth promotory rhizobacteria. Further, it elaborates on the different types of stress and strategies used by plants under various stress conditions.  The respective sections describe the importance of the microbiome for the overall health of plants and how exploring plant-microbe communication and signaling pathways could offer a promising avenue for future research. The book also discusses how rhizobacteria could be exploited in stress alleviation and sustainable agriculture, and addresses omics strategies for stress response and mitigation. Thanks to clearly annotated references, the book also supports and encourages readers to further explore the topics discussed.