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  2. UV coloration in flowers - Wikipedia

    en.wikipedia.org/wiki/UV_coloration_in_flowers

    As plants have evolved and adapted their UV coloration, pollinators have also fine-tuned their individual adaptations to maximize their ability to target flowers for food. [8] The dynamic relationship between the pollinators and the pollinated has led to novel mutations and in some cases novel species. [ 1 ]

  3. Photomorphogenesis - Wikipedia

    en.wikipedia.org/wiki/Photomorphogenesis

    In the absence of light, plants develop an etiolated growth pattern. Etiolation of the seedling causes it to become elongated, which may facilitate it emerging from the soil. A seedling that emerges in darkness follows a developmental program known as skotomorphogenesis (dark development), which is characterized by etiolation. Upon exposure to ...

  4. Photolyase - Wikipedia

    en.wikipedia.org/wiki/Photolyase

    Photolyase is a phylogenetically old enzyme which is present and functional in many species, from the bacteria to the fungi to plants [9] and to the animals. [10] Photolyase is particularly important in repairing UV induced damage in plants.

  5. UVR8 - Wikipedia

    en.wikipedia.org/wiki/UVR8

    UV-B resistance 8 (UVR8) also known as ultraviolet-B receptor UVR8 is an UV-B – sensing protein found in plants and possibly other sources. [2] It is responsible for sensing ultraviolet light in the range 280-315 nm and initiating the plant stress response. It is most sensitive at 285nm, near the lower limit of UVB.

  6. Photochemistry - Wikipedia

    en.wikipedia.org/wiki/Photochemistry

    Photoexcitation is the first step in a photochemical process where the reactant is elevated to a state of higher energy, an excited state.The first law of photochemistry, known as the Grotthuss–Draper law (for chemists Theodor Grotthuss and John W. Draper), states that light must be absorbed by a chemical substance in order for a photochemical reaction to take place.

  7. Mutagenesis - Wikipedia

    en.wikipedia.org/wiki/Mutagenesis

    DNA may be modified, either naturally or artificially, by a number of physical, chemical and biological agents, resulting in mutations. Hermann Muller found that "high temperatures" have the ability to mutate genes in the early 1920s, [2] and in 1927, demonstrated a causal link to mutation upon experimenting with an x-ray machine, noting phylogenetic changes when irradiating fruit flies with ...

  8. Phototropism - Wikipedia

    en.wikipedia.org/wiki/Phototropism

    The middle portion of the coleoptile is the area where the shoot curvature occurs. The Cholodny–Went hypothesis, developed in the early 20th century, predicts that in the presence of asymmetric light, auxin will move towards the shaded side and promote elongation of the cells on that side to cause the plant to curve towards the light source. [5]

  9. Evolution of photosynthesis - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_photosynthesis

    C 3 plants are on average around 14‰ (parts per thousand) lighter than the atmospheric ratio, while C 4 plants are about 28‰ lighter. The δ 13 C of CAM plants depends on the percentage of carbon fixed at night relative to what is fixed in the day, being closer to C 3 plants if they fix most carbon in the day and closer to C 4 plants if ...