A5068197865- Cocoa and Sweet Potato Agronomy
- Banana Cultivation and Research
- Plant Virus Research Studies
- Advances in Cucurbitaceae Research
- Genetics and Plant Breeding
- Phytochemicals and Antioxidant Activities
- Plant Physiology and Cultivation Studies
- Agricultural Innovations and Practices
- Agricultural Practices and Plant Genetics
- Potato Plant Research
- Organic Food and Agriculture
- Plant Pathogenic Bacteria Studies
- Growth and nutrition in plants
- Light effects on plants
- Child Nutrition and Water Access
- Postharvest Quality and Shelf Life Management
- Sensory Analysis and Statistical Methods
- Berry genetics and cultivation research
- Antioxidant Activity and Oxidative Stress
- Food composition and properties
- Allelopathy and phytotoxic interactions
- Livestock and Poultry Management
- Plant Pathogens and Fungal Diseases
- Innovation and Socioeconomic Development
- Cassava research and cyanide
International Potato Center
2013-2023
Kumasi Centre for Collaborative Research in Tropical Medicine
2016-2019
Agricultural Research Organization
2013
Louisiana State University Agricultural Center
2013
Kansas State University
2001-2012
International Potato Center
1997-2007
National Agricultural Research Organisation
2001-2007
National Agricultural Research Institute
1998-2007
Graduate School Experimental Plant Sciences
2007
International Potato Center
2007
Various angiosperms differed in their monovinyl and divinyl protochlorophyllide biosynthetic capabilities during the dark light phases of photoperiodic growth. Some plant species such as Cucumis sativus L., Brassica juncea (L.) Coss., kaber (DC.) Wheeler, Portulaca oleracea L. accumulated mainly at night. Monocotyledonous Avena sativa Hordeum vulgare Triticum secale Zea mays some dicotyledonous Phaseolus vulgaris Glycine max Merr., Chenopodium album Lycopersicon esculentum
Fruit and vegetable intake is inversely correlated with risks for several chronic diseases in humans. Phytochemicals, particular, phenolic compounds, present plant foods may be partly responsible these health benefits through a variety of mechanisms. Since environmental factors play role plant's production secondary metabolites, it was hypothesized that an organic agricultural system would increase levels. Cultivars leaf lettuce, collards, pac choi were grown either on organically certified...
Scope Anthocyanins, the natural pigments in plant foods, have been associated with cancer prevention. However, content of anthocyanins staple foods is typically low and mechanisms by which they exert anticancer activity not yet fully defined. Methods results We selected an anthocyanin-enriched purple-fleshed sweet potato clone, P40, investigated its potential effect both vitro cell culture vivo animal model. In addition to a high level total phenolics antioxidant capacity, P40 possesses at...
β-Carotene content in sweetpotato is associated with the Orange and phytoene synthase genes; due to physical linkage of sucrose synthase, β-carotene starch are negatively correlated. In populations depending on for food security, an important source calories, while provitamin A. The negative association between two traits contributes low nutritional quality consumed, especially sub-Saharan Africa. Using a biparental mapping population 315 F
Sweet potato virus disease (SPVD) is the name used to describe a range of severe symptoms in different cultivars sweet potato, comprising overall plant stunting combined with leaf narrowing and distortion, chlorosis, mosaic or vein‐clearing. Affected plants various were collected from several regions Uganda. All samples contained aphid‐borne feathery mottle potyvirus (SPFMV) almost all whitefly‐borne chlorotic stunt closterovirus (SPCSV). SPCSV was detected by mix monoclonal antibodies (MAb)...
ABSTRACT: Consumers of organically grown fruits and vegetables often believe that these products taste better than conventional produce. However, comparison produce from supermarket shelves does not permit adequate assessment this consumer perception, given potentially confounding cultivar environmental effects. We used replicated side‐by‐side plots to organic for sensory studies. In one test, red loose leaf lettuce, spinach, arugula, mustard greens, conventionally, were evaluated overall...
In a growth chamber study, lettuce ( Lactuca sativa ) plants were used to evaluate the effects of water deficits on health-promoting phytochemicals with antioxidant properties. Lettuce treated stress by withholding once at 6 weeks after sowing for 2 days or multiple times 4 days, 5 3 and days. Water increased total phenolic concentration capacity in lettuce. Young seedlings, 7 germination, had highest capacity, also, younger typically more responsive treatments accumulating antioxidants than...
Sweetpotato is a resilient food crop with great potential to contribute reduced hunger in the world. shows significant reducing Global Hunger Index, which reflects deficiencies calories and micronutrients based on components of hunger, undernourishment, under-five mortality rate, stunting wasting. Its genetic diversity has been harnessed through breeding increase vitamin A, iron, zinc content, virus resistance climate resilience for world's needs. Africa India are most food-insecure regions....
In order to understand the effects of drying and processing sweetpotato storage roots into traditional baked food products on their pro‐vitamin A contents, total carotenoids ß‐carotene were colorimetrically determined. Fresh cooked roots, dried stored chips, processed used. Flesh colors white, yellow, cream, orange, purple. Total ranged from trace above 9 mg equiv./100 g fresh root. Storage high carotenoid content cultivars had consistently orange flesh; those with low very contents yellow...
Summary Symptomless sweet potato ( Ipomoea batatas ) plants obtained from farmers' fields in each of the main growing regions Uganda were tested by nitro‐cellulose membrane enzyme‐linked immunosorbent assays (NCM‐ELISA) for feathery mottle virus (SPFMV), mild (SPMMV), chlorotic fleck (SPCFV), latent (SPLV), C‐6 (C‐6) and caulimo‐like (SPCa‐LV). Most gave negative reactions all NCM‐ELISA, only c. 5% giving positive to SPFMV c 1% SPMMV or SPCFV. Graft inoculations cuttings symptomless plants,...
Plant growth, yield, and fruit quality of two strawberries ( Fragaria × ananassa Duch.)—`Chandler' `Sweet Charlie'—grown under high tunnels (HTs) were compared with that field plants during 2002–03 2003–04 growing seasons. Plug planted in mid-October 2002 mid-September 2003 on raised beds covered black polyethylene mulch. Microclimate the HTs protected strawberry crowns from winter damage advanced production 5 weeks earlier than grown conditions. From December to February, average minimum...
Demand for organically grown produce is increasing, largely due to concerns of consumers about health and nutrition. Previous studies have not shown a consistent difference essential nutrients, such as vitamins minerals, between organic food crops the conventional counterparts. However, date, little consideration has been given phytochemicals, secondary plant metabolites with potential health-promoting properties. We first discuss factors that can infl uence levels phytochemicals in crops,...
Abstract BACKGROUND: This study was conducted to evaluate the influences of protected environment, organic fertilisation and growth stage on oxygen radical absorbance capacity (ORAC) values leafy vegetables. RESULTS: In a first experiment, pac choi grown in high tunnels had significantly lower ORAC than field‐grown plants. Organic fertiliser markedly increased antioxidant compared with conventional treatment, especially open field. However, both field production resulted yield more severe...
As the largest group of phytochemicals, dietary phenolics play an important role in human health and disease prevention. Cultural practices have been shown to potential for affecting phenolic compounds food crops. Spring summer trials were conducted 2003 examine effects organic fertilization high tunnel environments on constituents lettuce ( Lactuca sativa L.) cultivars Red Sails Kalura. Effects postharvest storage at 4 °C 16 days total harvested from trial also evaluated. Total phenolics,...
Crowdsourced citizen science is an emerging approach in plant sciences. The triadic comparison of technologies (tricot) has been successfully utilized by demand-led breeding programmes to identify varieties for dissemination suited specific geographic and climatic regions. An important feature this the independent way which farmers individually evaluate on their own farms as “citizen scientists.” In study, we adapted consumer preferences boiled sweetpotato [ Ipomoea batatas (L.) Lam] roots...
Bwanjule', 'New Kawogo', 'Tanzania', and 'Wagabolige' are superior Ugandan farmers' cultivars selected from a collection of 380 landrace accessions assembled at Namulonge Agricultural Animal Production Research Institute (NAARI) in 1987 subsequently evaluated trials NAARI elsewhere Uganda.Pedigrees these not known, but they assumed to be chance seedlings by farmers.On the basis numbers cultivars, adaptation local conditions, including diseases pests, eastern Africa is considered secondary...
Abstract BACKGROUND: Field and greenhouse studies were performed to investigate whether organic production methods influenced levels of phenolic acid compounds in pac choi ( Brassica rapa L. chinensis cv. Mei Qing Choi) compared with conventional cultivation. RESULTS: In the field experiment, fertilisation (compost + fish emulsion) resulted significantly higher concentrations (NPK CaNO 3 ) under both high tunnel open environments. Increased phenolics accompanied by a significant reduction...