Extremophilic Microbes and their Extremozymes for Industry and Allied Sectors Hiran Kanti Santra and Debdulal Banerjee Halophillic Rhizobacteria as the Acquaintance of Crop Plants Enduring Soil Salinity Deepanwita Deka and Dhruva Kumar Jha Halophilic Microbiome: Biodiversity and Biotechnological Applications Mrugesh Dhirajlal Khunt, Rajesh Ramdas Waghunde, Chandrashekhar Uttamrao Shinde and Dipak Maganlal Pathak Use of Halo-tolerant Bacteria to Improve the Bioactive Secondary Metabolites in Medicinally Important Plants under Saline Stress Yachana Jha and RB Subramanian Hot Springs Thermophilic Microbiomes: Biodiversity and Biotechnological Applications Juan-José Escuder-Rodríguez, María-Eugenia DeCastro, Esther Rodríguez-Belmonte, Manuel Becerra and María-Isabel González-Siso Molecular Biology of Thermophilic and Psychrophilic Archaea Chaitali Ghosh and Jitendra Singh Rathore Microbes from Cold Deserts and Their Applications in Mitigation of Cold Stress in Plants Murat Dikilitas, Sema Karakas, Eray Simsek and Ajar Nath Yadav Cold-active Microfungi and their Industrial Applications Sanjay Sahay Cold Adapted Microorganisms: Survival Mechanisms and Applications Deep Chandra Suyal, Ravindra Soni, Ajar Nath Yadav and Reeta Goel Psychrophilic Microbiomes: Unravelling the Molecular Adaptation Strategies using In Silico Approaches Abhigyan Nath Psychrophilic Microbiomes: Biodiversity, Molecular Adaptations and Applications K. Kamala, P. Sivaperumal, S. Manjunath Kamath, P. Kumar and Richard Thilagaraj Extremophilic Microbes: Blooms the Biological Synthesis of Nanoparticles Aathira Sreevalsan, Jamseel Moopantakath and Ranjith Kumavath Biocontrol Potential and Applications of Extremophiles for Sustainable Agriculture Gajanan Mehetre, Vincent Vineeth Leo, Garima Singh, Prashant Dhawre, Igor Maksimov and Bhim Pratap Singh Alcohol and Hydrogen Production by Hyperthermophiles Kesen Ma, Sarah Danielle Kim and Vivian Serena Chu Microorganisms from Permafrost and their Possible Applications A. Brouchkov, V. Melnikov, G.I. Griva, E. Kashuba, V. Kashuba, M. Kabilov, O. Fursova, V. Bezrukov, Kh. Muradian, V. Potapov, G. Pogorelko, N. Fursova, S. Ignatov, V. Repin, L. Kalenova, A. Subbotin, Y.B. Trofimova, E.V. Brenner, S. Filippova, V. Rogov, V.Galchenko and A. Mulyukin Biodiversity and Biotechnological Applications of Extremophilic Microbiomes: Current Research and Future Challenges Ajar Nath Yadav, Tanvir Kaur, Rubee Devi, Divjot Kour and Neelam Yadav