Flavonoids and Melanins: A Common Strategy across Two Kingdoms
| Autor: | Giorgia Carletti, Luigi Cattivelli, G. Nervo |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Cyanobacteria
antioxidant strategy pigments horizontal gene transfer (HGT) Antioxidant Ultraviolet Rays medicine.medical_treatment plants animals metabolism genetic bases mutants Betalains Review Applied Microbiology and Biotechnology Antioxidants chemistry.chemical_compound Botany medicine Animals Molecular Biology Ecology Evolution Behavior and Systematics Flavonoids Melanins Abiotic component chemistry.chemical_classification Reactive oxygen species Molecular Structure biology Pigmentation Superoxide Singlet oxygen Reproduction fungi food and beverages Free Radical Scavengers Cell Biology Plants biology.organism_classification Biological Evolution chemistry Nucleic acid Hydroxyl radical Genetic Fitness Metabolic Networks and Pathways Developmental Biology |
| Zdroj: | International Journal of Biological Sciences |
| ISSN: | 1449-2288 |
| DOI: | 10.7150/ijbs.9672 |
| Popis: | Ultraviolet (UV) radiations alter a number of metabolic functions in vivant. They produce damages to lipids, nucleic acids and proteins, generating reactive oxygen species such as singlet oxygen (O2), hydroxyl radical (HO) and superoxide anion (O2-). Plants and animals, after their water emersion, have developed biochemical mechanisms to protect themselves from that environmental threat through a common strategy. Melanins in animals and flavonoids in plants are antioxidant pigments acting as free radical scavenging mechanisms. Both are phenol compounds constitutively synthesized and enhanced after exposure to UV rays, often conferring a red-brown-dark tissue pigmentation. Noteworthy, beside anti-oxidant scavenging activity, melanins and flavonoids have acquired secondary functions that, both in plants and animals, concern reproductions and fitness. Plants highly pigmented are more resistant to biotic and abiotic stresses. Darker wild vertebrates are generally more aggressive, sexually active and resistant to stress than lighter individuals. Flavonoids have been associated with signal attraction between flowers and insects and with plant-plant interaction. Melanin pigmentation has been proposed as trait in bird communication, acting as honest signals of quality. This review shows how the molecular mechanisms leading to tissue pigmentation have many functional analogies between plants and animals and how their origin lies in simpler organisms such as Cyanobacteria. Comparative studies between plant and animal kingdoms can reveal new insight of the antioxidant strategies in vivant. |
| Databáze: | OpenAIRE |
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