User:ElizabethKaye85/sandbox

On 26th November 2018, chose page to work on. Wanted to do something in the area of circadian rhythms in plants-wanted to learn more about this. Found the nyctinasty page, saw that it was lacking some clarification about phytochromes, wanted to revamp this information, making it easier to understand and interpret.

On 27th November, generally researching information about far-red light, and role of phytochromes.

30 November, Review Articles found:

http://science.sciencemag.org/content/sci/296/5566/285.full.pdf Flowering - Arabidopsis, the rosetta stone of flowering time?

Phytochrome structure and signaling mechanisms. Rockwell, Nathan. Annual review of plant biology Volume: 57 (2006) ISSN: 1543-5008 Online ISSN: 1545-2123 https://www.annualreviews.org/doi/pdf/10.1146/annurev.arplant.56.032604.144208

Diurnal and annual rhythms in trees https://link.springer.com/content/pdf/10.1007%2Fs00468-009-0324-1.pdf

EDITS: "This is the plant sleeping" "Plants use phytochrome to detect red and far red light. Depending on which kind of light is absorbed, the protein can switch between a Pr state that absorbs red light and a Pfr state that absorbs far red light. Red light converts Pr to Pfr and far red light converts Pfr to Pr. Many plants use phytochrome to establish circadian cycles which influence the opening and closing of leaves associated with nyctastic movements."
 * 1) Suggest removing or rephrasing
 * 1) 2 Talk about Dark Reversion, the switch between Far red and Red light, possibly better way of saying "sleeping"
 * 2) 3 Rephrase

1 December Rephrased Statement Dark reversion, a process found only in plants, happens when Pfr (Phytochrome Far-red) converts to Pr (Phytochrome Red) during the nocturnal portion of a diurnal circadian cycle.

Full Edits Plants utilize the photoreceptor phytochrome to direct physiological responses in the plant. In the process known as dark reversion, light absorption in the plant switches from Pfr (Phytochrome Far-red) to Pr (Phytochrome Red) during the nocturnal portion of a diurnal circadian cycle. This is the plant sleeping. Plants use phytochrome to detect red and far red light. Depending on which kind of light is absorbed, the protein can switch between a Pr state that absorbs red light and a Pfr state that absorbs far red light. Red light converts Pr to Pfr and far red light converts Pfr to Pr. Many plants use phytochrome to establish circadian cycles which influence the opening and closing of leaves associated with nyctastic movements. This change in phenotype by the plant via photoperiodism are regulated by an internal clock and overseen by the phytochrome system which influence the opening and closing of leaves associated with nyctastic movements. Anatomically, the nyctastic movements are mediated by pulvini. A well known example of nyctastic movement in plants is with Mimosa pudica, which was discovered by De Marian.

2 December

Here will be the revamped 2nd paragraph for the page.

Plants utilize the photoreceptor phytochrome to direct physiological responses in the plant. In the process known as dark reversion, light absorption in the plant switches from Pfr (Phytochrome Far-red) to Pr (Phytochrome Red) during the nocturnal portion of a diurnal circadian cycle. This change in phenotype by the plant via photoperiodism are regulated by an internal clock and overseen by the phytochrome system which influence the opening and closing of leaves associated with nyctastic movements. Anatomically, the nyctastic movements are mediated by pulvini.

A well known example of nyctastic movement in plants is with Mimosa pudica, which was discovered by De Marian.