Plant tissue culture technique employed for the identification and isolation of bioactive phytocompounds has numerous industrial applications. It provides potential benefits for different industries which include food, pharmaceutical and cosmetics. Various agronomic crops i.e., cereals, fruits, vegetables, ornamental plants and forest trees are currently being used for in vitro propagation. Plant tissue culture coupled with biotechnological approaches leads towards sustainable agricultural development providing solutions to major food security issues. Plants are the rich source of phytochemicals with medicinal properties rendering them useful for the industrial production of pharmaceuticals and nutraceuticals. Furthermore, there are numerous plant compounds with application in the cosmetics industry. In addition to having moisturizing, anti‐ageing, anti‐wrinkle effects; plant-derived compounds also possess pharmacological properties such as antiviral, antimicrobial, antifungal, anticancer, antioxidant, anti-inflammatory, and anti-allergy characteristics. The in vitro propagation of industrially significant flora is gaining attention because of its several advantages over conventional plant propagation methods. One of the major advantages of this technique is the quick availability of food throughout the year, irrespective of the growing season, thus opening new opportunities to the producers and farmers. The sterile or endangered flora can also be conserved by plant micro propagation methods. Hence, plant tissue culture is an extremely efficient and cost-effective technique for biosynthetic studies and bio-production, biotransformation, or bioconversion of plant-derived compounds. However, there are certain limitations of in-vitro plant regeneration system including difficulties with continuous operation, product removal, and aseptic conditions. For sustainable industrial applications of in-vitro regenerated plants on a large scale, these constraints need to be addressed in future studies.

Plants often face incompatible growing environments like drought, salinity, cold, frost, and elevated temperatures that affect plant growth and development leading to low yield and, in worse circumstances, plant death. The arsenal of versatile compounds for plant consumption and structure is called metabolites, which allows them to develop strategies to stop enemies, fight pathogens, replace their competitors and go beyond environmental restraints. These elements are formed under particular abiotic stresses like flooding, heat, drought, cold, etc., and biotic stress such as a pathogenic attack, thus associated with survival strategy of plants. Stress responses of plants are vigorous and include multifaceted crosstalk between different levels of regulation, including regulation of metabolism and expression of genes for morphological and physiological adaptation. To date, many of these compounds and their biosynthetic pathways have been found in the plant kingdom. Metabolites like amino acids, phenolics, hormones, polyamines, compatible solutes, antioxidants, pathogen related proteins (PR proteins), etc. are crucial for growth, stress tolerance, and plant defense. This review focuses on promising metabolites involved in stress tolerance under severe conditions and events signaling the mediation of stress-induced metabolic changes are presented.

Functional foods have gained increasing attention for their dual role in providing essential nutrition and promoting health through the presence of bioactive compounds. These compounds, naturally found in a variety of plant and animal sources, include polyphenols, carotenoids, omega‐3 fatty acids, probiotics, prebiotics, alkaloids, and terpenoids. They exhibit a wide range of therapeutic effects, mediated through mechanisms such as antioxidant activity, anti‐inflammatory responses, modulation of gut microbiota, and enzyme inhibition. This review offers a comprehensive classification of these key bioactive compounds, detailing their natural origins with an emphasis on their mechanisms of action. Additionally, it explores their incorporation into diverse functional food matrices, including fortified beverages, dairy products, snack items, and dietary supplements. Modern biotechnological and AI‐driven approaches have revolutionized the precision, efficacy, and characterization of functional food products by enabling high‐throughput screening of bioactive compounds, predictive modeling for formulation, and large‐scale data mining to identify novel ingredient interactions and health correlations. Despite the growing popularity of functional foods, challenges persist in terms of the stability and bioavailability of bioactive compounds, regulatory hurdles, and consumer acceptance. Addressing these issues is critical to ensuring the efficacy and safety of functional food products. The review also highlights future perspectives in the field, emphasizing the need for innovative delivery systems and multidisciplinary research to enhance the bioavailability, functionality, and accessibility of these products. By highlighting the challenges and proposing possible solutions, this review serves as a foundational reference for bridging the gap among researchers, healthcare professionals, and stakeholders.

Xanthomonas citri subsp. citri, a causative agent of the citrus canker (CC) disease, belongs to one of the essential groups of the bacterial phytopathogen family, Xanthomonadaceae. It has been a potential threat to the globally significant citrus fruit crop, which has remained under investigation for disease management and epidemiology since the 1980s. In Pakistan, the average yield of citrus is 11 t/ha, which is lower than other countries, including China, Brazil, and India, having average productions of 27, 26, and 22 tons/hectare, respectively. Citrus canker is one of the most devastating diseases, posing a significant threat to crop yield and fruit quality. To date, five distinct types (or forms) of the citrus canker have been recognized; the Asiatic (Canker A) form is most destructive and affects most citrus cultivars. Severe infection outcomes include dieback, defoliation, severely blemished fruit, premature fruit drop, and reduced fruit quality. The infection increases under humid, warm, cloudy climate, wind, and heavy rainfall. The analysis of plasmid and chromosomal DNA of X. citri subsp. citri depicted an evolutionary relationship among pathovars of Xanthomonas. The extensive study on the genome of X. citri subsp. citri has contributed to the current knowledge of plant host recognition of pathogens, host specificities, dissemination, and propagation. Regulatory programs, i.e., quarantine or exclusion, continued to be practiced, prohibiting infected citrus plant material into the existing stock. Other measures include removal of inoculums sources, resistant hosts, protective copper-containing sprays, and windbreak systems. In this review, we explored the latest trends in the areas of epidemiology, pathogenome, detection, host–pathogen interaction, biofilm formation, and management of X. citri subsp. citri.

Soil is a porous matrix containing organic matter and minerals as well as living organisms that vary physically, geographically, and temporally. Plants choose a particular microbiome from a pool of soil microorganisms which helps them grow and stay healthy. Many ecosystem functions in agrosystems are provided by soil microbes just like the ecosystem of soil, the completion of cyclic activity of vital nutrients like C, N, S, and P is carried out by soil microorganisms. Soil microorganisms affect carbon nanotubes (CNTs), nanoparticles (NPs), and a nanopesticide; these are called manufactured nano-objects (MNOs), that are added to the environment intentionally or reach the soil in the form of contaminants of nanomaterials. It is critical to assess the influence of MNOs on important plant-microbe symbiosis including mycorrhiza, which are critical for the health, function, and sustainability of both natural and agricultural ecosystems. Toxic compounds are released into rural and urban ecosystems as a result of anthropogenic contamination from industrial processes, agricultural practices, and consumer products. Once discharged, these pollutants travel through the atmosphere and water, settling in matrices like sediments and groundwater, potentially rendering broad areas uninhabitable. With the rapid growth of nanotechnology, the application of manufactured nano-objects in the form of nano-agrochemicals has expanded for their greater potential or their appearance in products of users, raising worries about possible eco-toxicological impacts. MNOs are added throughout the life cycle and are accumulated not only in the soils but also in other components of the environment causing mostly negative impacts on soil biota and processes. MNOs interfere with soil physicochemical qualities as well as microbial metabolic activity in rhizospheric soils. This review examines the harmful effect of MNOs on soil, as well as the pathways used by microbes to deal with MNOs and the fate and behavior of NPs inside the soils.

Plants have long served as a cornerstone for drug discovery, offering a vast repertoire of bioactive compounds with proven efficacy in combating oxidative stress, a pivotal driver of chronic diseases such as cancer, diabetes, cardiovascular disorders, and neurodegenerative conditions. This review synthesizes current knowledge on plant-derived antioxidants, emphasizing their mechanisms, therapeutic potential, and quantitative efficacy validated through standardized assays. Key phytochemicals, including polyphenols, carotenoids, flavonoids, and terpenoids, neutralize reactive oxygen species (ROS) through radical scavenging, enzyme modulation, and gene regulation. For instance, lutein, a carotenoid found in leafy greens, demonstrates potent antioxidant activity with IC50 values of 1.75 μg/mL against hydroxyl radicals and 2.2 μg/mL in lipid peroxidation inhibition, underscoring its role in mitigating cardiovascular and ocular diseases. Similarly, quercetin, a ubiquitous flavonoid in onions and berries, exhibits remarkable ROS-scavenging capacity, with IC50 values of 0.55 μg/mL, 2,2-Diphenyl-1-picrylhydrazyl (DPPH) and 1.17 μg/mL, 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), supporting its use in reducing inflammation and neurodegeneration. The therapeutic promise of these compounds extends to disease-specific applications. Limonoids from citrus fruits, such as limonin (IC50: 15–31 μg/mL), enhance Phase II detoxification enzymes, offering protection against chemical carcinogens. Sulforaphane, a glucosinolate derived from cruciferous vegetables, shows potent anticancer activity with an IC50 of 85.66 mg in DPPH radical scavenging, while β-sitosterol (IC50: 1.43–2.42 mM) inhibits tumor proliferation and cholesterol synthesis. Synergistic interactions further amplify their efficacy: phytoestrogens like genistein (IC50: 13.00 ppm) and terpenoids such as α-pinene (IC50: 12.57 mg/mL) collectively enhance anti-inflammatory and antimicrobial responses, illustrating the multi-targeted nature of plant-based therapies. Beyond disease prevention, these compounds address age-related decline. Ascorbic acid (vitamin C), with an IC50 of 11.81 μg/mL for antioxidant activity, mitigates skin aging and accelerates wound healing, while selenium nanoparticles (IC50: 0.437 μg/mL) bolster immune function and reduce chemotherapy-induced toxicity. Dietary fibers, exemplified by sugar beet fibers (IC50: 52.32 μg/mL for DPPH scavenging), further contribute to cardiovascular health by lowering Low-Density Lipoprotein (LDL) cholesterol. This review not only catalogs the antioxidant prowess of phytochemicals but also highlights their translational potential. Advances in nanotechnology, such as nano-formulated curcumin, have overcome bioavailability challenges, enhancing clinical applicability. By integrating quantitative metrics (e.g., IC50, radical scavenging rates) with mechanistic insights, this work bridges the gap between traditional knowledge and modern pharmacology.