Adaptive Strategies to Biotic Stress in Qatar’s Native Flora

Qatar’s arid and semi-arid landscapes present extreme environmental conditions where native flora face multiple stressors, and plants must simultaneously combat abiotic pressures, including high salinity, water scarcity, intense solar radiation, and extreme temperatures, alongside biotic threats from herbivory, microbial pathogens, and interspecific competition. However, the integrated mechanisms by which these species coordinate defences against both abiotic and biotic stressors (particularly pathogenic microorganisms) remain insufficiently understood, creating a critical knowledge gap in comprehending plant persistence strategies in harsh desert environments. Therefore, this study investigates the comprehensive defence strategies that facilitate plant survival under dual pressures, examining chemical responses including antimicrobial compounds and phenolic production, structural barriers such as thick cuticles, trichomes, and reinforced cell walls, and functional trade-offs affecting water-use efficiency and gas exchange. The research assesses how abscisic acid accumulation, triggered by abiotic stress, enhances biotic resistance through specific biochemical regulatory processes, while critically evaluating the advantages and costs of structural and biochemical adaptations. These findings demonstrate that native species employ interconnected response systems to sustain themselves under simultaneous abiotic and biotic pressures, thereby supporting biodiversity, ecological resilience, and long-term stability of Qatar's fragile desert habitats through coordinated physiological and morphological strategies.