Introgression of antioxidant activity into cassava (Manihot esculentaC.): an effective technique for extending fresh storage roots shelf life
| Autor: | Rob Melis, Paul Shanahan, Athanase Nduwumuremyi, Theodore Asiimwe |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
0301 basic medicine Antioxidant medicine.medical_treatment Introgression Plant Science Shelf life 01 natural sciences 03 medical and health sciences Botany Genetics medicine Carotenoid chemistry.chemical_classification Reactive oxygen species Phytoene synthase biology Manihot esculenta food and beverages Horticulture 030104 developmental biology chemistry Postharvest biology.protein Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Plant Breeding. 135:1-8 |
| ISSN: | 0179-9541 |
| DOI: | 10.1111/pbr.12323 |
| Popis: | Physiological postharvest deterioration (PPD) of cassava is the main constraint affecting its nutritional and economical values. PPD is induced by wounds when detaching storage roots from mother plant during harvesting. It is accelerated by the reactive oxygen species (ROS) such as oxygen ion (O2) and peroxide (O2)−2. The carotenoid content and its antioxidant property can help in extending shelf life of cassava storage roots. The primary mode of action of carotenoids as antioxidant is to quench singlet oxygen. Cassava breeding was reported to successfully introgress and improve carotenoid content into cassava. The two types of phytoene synthase (PSY) enzymes (PSY1 and PSY2) are key regulators of carotenoids accumulation in cassava. Carotenoids formation and accumulation in cassava storage roots are induced by a single nucleotide polymorphism in PSY2 which causes a non-conservative amino acid exchange. This single nucleotide polymorphism in PSY gene is co-segregated with β-carotene in cassava storage roots, a phenomenon that could help to unravel the mechanism of introgression of carotenoids into cassava. This article investigates breeding feasibility for improving quality of cassava landraces in developing countries. |
| Databáze: | OpenAIRE |
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