Search results
Results from the WOW.Com Content Network
Melanin (/ ˈ m ɛ l ə n ɪ n / ⓘ; from Ancient Greek μέλας (mélas) ' black, dark ') is a family of biomolecules organized as oligomers or polymers, which among other functions provide the pigments of many organisms. [1] Melanin pigments are produced in a specialized group of cells known as melanocytes.
Iris chrysographes is a clump-forming herbaceous perennial with creeping rhizomes.The leaves are linear and greyish green, and up to 70 cm (28 in) long. The hollow flowering stems, 25–30 cm (9.8–11.8 in) long, bear slightly scented flowers in early summer.
Melanin is a compound found in plants, animals, and protists, and is derived from the amino acid tyrosine. Melanin is a photoprotectant, absorbing the DNA-damaging ultraviolet radiation of the sun. Vertebrates have melanin in their skin and hair, feathers, or scales.
In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of melanin in the iris pigment epithelium (located on the back of the iris), the melanin content within the iris stroma (located at the front of the iris), and the cellular density of the stroma. [4]
Iris is extensively grown as ornamental plant in home and botanical gardens. Presby Memorial Iris Gardens in New Jersey, for example, is a living iris museum with over 10,000 plants, [24] while in Europe the most famous iris garden is arguably the Giardino dell'Iris in Florence (Italy) which every year hosts a well attended iris breeders ...
Iris atrofusca (Judean iris or Gilead iris) is a species in the genus Iris, where it is placed in the subgenus Iris and the section Oncocyclus. It is a rhizomatous perennial from the deserts of Israel, the Palestinian territories, and Jordan. The species has long falcate (sickle-shaped) or ensiform (sword-shaped) leaves, a long thick stem and ...
The light-absorbing compound in the fungus cell membranes had the effect of turning the water black. [5] While there are many cases of extremophiles (organisms that can live in severe conditions such as that of the radioactive power plant), a hypothetical radiotrophic fungus would grow because of the radiation, rather than in spite of it. [6]
Iris foetidissima L. – Stinking Iris, Gladwin Iris, Stinking Gladwin, Gladdon, Roast-beef Plant; Series Hexagonae (known as the Louisiana irises) Iris brevicaulis Raf. – Zigzag Iris; Iris fulva Ker-Gawl. – Copper Iris; Iris giganticaerulea – Giant Blue Iris, Giant Blue Flag; Iris hexagona Walt. – Dixie Iris; Iris nelsonii Randolph ...