Vegetable plays a key role in food and nutrition security in Ghana as the country’s food system shifts from food quantity to diet quality and health benefits. This chapter looks at the role vegetables play in the diets of humans in ensuring food and nutrition security. Traditional locally available underutilized vegetable crops as well as exotic vegetable crops could be utilized to improve nutrition and health. One of the strategies for promoting vegetable production is the development and adoption of innovative and modern technologies to address major challenges impeding the advancement of vegetable production in Ghana. These challenges include lack of improved varieties, nonfunctional seed systems, poor infrastructure for storage and processing, uncontrolled use of agrochemicals, etc. Genetic manipulation, soil and water management as well as integrated pest and disease management have been harnessed with significant achievement to boost vegetable production. Other emerging, including nursery management, controlled environment (such as a greenhouse), grafting, post-harvest handling, digital marketing, information and extension services can also be promoted. Greenhouse production increases vegetable crop quality and productivity, which results in higher economic returns. Finally, the chapter highlights the enormous prospects and contributions of vegetable production towards reducing rural poverty and unemployment.

Compost residue enriches soil health with the potential to enhance plant metabolism and hormonal balance, but has not yet been studied. A study was performed to determine how prevailing compost residue induces tomato (Solanum lycopersicum ‘Scotia’) plant morpho-physiology, phytohormones, and secondary metabolites. Plants were grown in soils with a previous history of annual (AN) and biennial (BI) compost amendments. The controls were soil without compost (C) amendment and municipal solid waste compost (MSWC) alone. The MSWC- and AN-plants had similar and significantly (p < 0.05) highest growth and photosynthetic activities compared to the BI- or C-plants. Total phenolics and lipid peroxidase activity were significantly (p < 0.001) high in BI-plants, while hydrogen peroxide and antioxidant capacity were significantly (p < 0.001) high in AN-plants. MSWC-plants recorded the highest cis-abscisic acid, followed by AN-, and then BI- and C-plants. Cis-zeatin, trans-zeatin, and isopentenyladenine ribosides were detected in the MSWC- and AN-plants but not in the BI- or C-plants. Furthermore, gibberellins GA53, GA19, and GA8 were high in the MSWC-plants, but only GA8 was detected in the AN plants and none in the others. Besides, MSWC plants exhibited the highest content of 1-aminocyclopropane-1-carboxylic acid. Conjugated salicylic acid was highest in the BI-plants, while jasmonic acid-isoleucine was highest in MSWC-plants and C plants. In conclusion, prevailing compost chemical residues upregulate plant growth, phytohormones, and metabolic compounds that can potentially increase plant growth and abiotic stress defense. Future work should investigate the flow of these compounds in plants under abiotic stress.

Waterleaf (Talinum fruticosum) is an underutilized leafy vegetable with recognized tolerance to environmental stresses, yet comprehensive characterization of its morpho-physiological and biochemical responses to contrasting water stress conditions remains limited. This study aimed to evaluate the morphological, physiological, and biochemical responses of waterleaf to continuous drought and waterlogging stress, and to examine trait interrelationships under each stress using correlation analyses, providing exploratory insights into coordinated stress responses. The experiment was conducted under controlled greenhouse conditions using a completely randomized design. Plants were subjected to three watering regimes: well-watered control, continuous flooding, and severe drought (≤10% field capacity). Drought stress induced more severe growth suppression than waterlogging, with reductions of 3.8-fold in leaf area and 5.5-fold in flower production compared to control. Net photosynthetic rate declined by 5.7-fold under drought and 3.1-fold under waterlogging, accompanied by corresponding reductions in stomatal conductance and transpiration rate. Proline accumulation was substantially enhanced under drought (3.6-fold increase), while soluble sugars increased by 1.7-fold. Total phenolics and flavonoids increased by 1.8-fold and 1.7-fold, respectively, under drought stress, with more moderate increases under waterlogging. Oxidative stress markers, including malondialdehyde (3.4-fold increase) and hydrogen peroxide (2.9-fold increase), were significantly elevated under drought compared to waterlogging. Correlation analyses revealed stronger and more numerous interrelationships among traits under drought stress, indicating a more coordinated and integrated stress response. The findings demonstrate that waterleaf exhibits differential sensitivity to drought and waterlogging, with drought imposing more severe constraints on growth, photosynthesis, and reproductive output. The stress-induced accumulation of phenolic compounds and enhanced antioxidant capacity suggests that controlled water stress may influence the phytochemical profile of waterleaf, presenting opportunities for further research to optimize irrigation practices for balancing yield and quality in sustainable production systems.