Harnessing metabolites from plant cell tissue and organ culture for sustainable biotechnology

The convergence of plant cell, tissue and organ culture (PCTOC) with metabolomics and computational tools represents a transformative platform for sustainable biotechnology. PCTOC enables the controlled, sterile, and scalable production of high-value secondary metabolites, independent of environmental and geographical constraints. However, the metabolic complexity of plant systems and the variability in culture conditions have historically posed challenges in optimizing metabolite yields. Metabolomics, by providing a comprehensive snapshot of small cellular-molecule composition, allows for the monitoring, analysis, and manipulation of biosynthetic pathways in vitro. By guiding experimental designs through response surface methodology and leveraging computational prediction via artificial intelligence, metabolomics enables data-driven optimization of culture parameters, enabling a shift from empirical to rational design strategies. This review presents a holistic framework for harnessing metabolites from PCTOC systems, highlighting the advances in bioreactor technologies, analytical platforms (LC-MS/MS, GC-MS/MS, NMR), and computational analytics that collectively enhance metabolite production. Here we critically examine case studies of commercially important phytochemicals produced via callus, suspension, adventitious root, and hairy root cultures, with emphasis on elicitation strategies, metabolic engineering, and flux analysis. Moreover, the application of PCTOC-metabolomics platforms extends beyond bioproduction to plant conservation and biodiversity, where chemotaxonomic profiling supports ex situ preservation of threatened species. Despite its promise, this integrated approach faces technical and translational challenges, including limited spectral libraries, scalability barriers, and regulatory constraints. Future directions emphasize the development of automated bioprocess systems, multi-omics integration, AI-guided synthetic biology, and sustainable biomanufacturing aligned with circular economy principles. Ultimately, the integration of PCTOC and metabolomics, powered by computational innovation, offers a resilient, reproducible, and eco-conscious strategy for plant-based bioproduction, conservation, and therapeutic discovery in the post-genomic era.