Programmed Cell Death in Plants: A Genomic Symphony

Programmed cell death (PCD) in plants is a genetically encoded and tightly regulated process crucial for growth, development, and environmental adaptation. Although analogous to apoptosis in animals, plant PCD exhibits distinct molecular and structural features coordinated by chloroplasts, mitochondria, and vacuoles. This review synthesises recent advances in the genomic, molecular, and computational understanding of plant PCD. Key effectors such as metacaspases, vacuolar processing enzymes, and regulatory proteins are highlighted, with upstream transcriptional networks integrating biotic and abiotic cues. Stressors, including salinity, heat, ultraviolet radiation, and drought, trigger redox-dependent cascades that remodel cellular homeostasis and activate cell-death pathways, whereas cystatins, BI-1, and Bcl-2-like proteins act as potent suppressors. We also examine how multi-omics, deep learning, and CRISPR technologies redefine the discovery and manipulation of PCD-related genes. By linking molecular signalling to computational modelling, this study outlines how PCD targeted control can improve crop resilience and productivity. Future research should focus on organelle crosstalk, single-cell transcriptomics, and the ethical implementation of AI-driven genome engineering.