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Chlorophyll (also chlorophyl) is a term used for several closely related green pigments found in cyanobacteria and the chloroplasts of algae and plants.〔(【引用サイトリンク】 title =Chlorophyll )〕 Its name is derived from the Greek words χλωρός, ''chloros'' ("green") and φύλλον, ''phyllon'' ("leaf").〔(【引用サイトリンク】url=http://www.etymonline.com/index.php?term=chlorophyll&allowed_in_frame=0 )〕 Chlorophyll is an extremely important biomolecule, critical in photosynthesis, which allows plants to absorb energy from light. Chlorophyll absorbs light most strongly in the blue portion of the electromagnetic spectrum, followed by the red portion. Conversely, it is a poor absorber of green and near-green portions of the spectrum which it reflects, hence the green color of chlorophyll-containing tissues.〔Chlorophyll molecules are specifically arranged in and around photosystems that are embedded in the thylakoid membranes of chloroplasts. Two types of chlorophyll exist in the photosystems: chlorophyll a and b. 〕 Chlorophyll was first isolated and named by Joseph Bienaimé Caventou and Pierre Joseph Pelletier in 1817.〔See: * * Pelletier and Caventou (1817) ("Notice sur la matière verte des feuilles" ) (Notice on the green material in leaves), ''Journal de Pharmacie'', 3 : 486-491. On p. 490, the authors propose a new name for chlorophyll. From p. 490: ''"Nous n'avons aucun droit pour nommer une substance connue depuis long-temps, et à l'histoire de laquelle nous n'avons ajouté que quelques faits ; cependant nous proposerons, sans y mettre aucune importance, le nom de ''chlorophyle'', de ''chloros'', couleur, et ''φυλλον'', feuille : ce nom indiquerait le rôle qu'elle joue dans la nature."'' (We have no right to name a substance (has been ) known for a long time, and to whose story we have added only a few facts ; however, we will propose, without giving it any importance, the name ''chlorophyll'', from ''chloros'', color, and ''φυλλον'', leaf : this name would indicate the role that it plays in nature.)〕 ==Gallery== Image:Leavessnipedale.jpg|Chlorophyll gives leaves their green color and absorbs light that is used in photosynthesis. Image:Clorofila 3.jpg|Chlorophyll is found in high concentrations in chloroplasts of plant cells. File:Chlorofilab.svg|Absorption maxima of chlorophylls against the spectrum of white light. Image:AYool SEAWIFS annual.png|SeaWiFS-derived average sea surface chlorophyll for the period 1998 to 2006. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「chlorophyll」の詳細全文を読む スポンサード リンク
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