• Virus-host interaction and movement underpin plant pathology, connecting tissue-level virus spread to host susceptibility and environmental modulation of infection across tomato, tobacco, and cereals [1], [2], [3], [4], [5], [11].

• Transmission ecology and disease spread patterns emerge from cross-crop transmission studies and necrosis-linked pathologies, highlighting epidemiology and laboratory methods [8], [9], [10], [17].

• Metabolic and environmental modulators of disease outcomes show that photosynthesis, water relations, and plant hormone (auxin) dynamics influence susceptibility and defense [5], [6], [11], [12], [13], [20].

• Cellular and cytological foundations reveal how plant cell biology, staining techniques, and organelle biology contextualize pathogen interactions [7], [8], [16], [20].

• Resistance and defense mechanisms in plants, including seedling-blight resistance, immunity, and developmental responses to pollen extracts, frame early plant defense theory [5], [11], [18], [19].