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English: Chloroplast ultrastructure outer membrane; intermembrane space; inner membrane (1+2+3: envelope) stroma (aqueous fluid) thylakoid lumen (inside of thylakoid) thylakoid membrane; granum (stack of thylakoids) thylakoid (lamella) starch; ribosome; plastidial DNA; plastoglobule (drop of lipids)
The thylakoid lumen is a continuous aqueous phase enclosed by the thylakoid membrane. It plays an important role for photophosphorylation during photosynthesis. During the light-dependent reaction, protons are pumped across the thylakoid membrane into the lumen making it acidic down to pH 4.
This image is a derivative work of the following images: File:Chloroplast-new.jpg licensed with PD-user-en, PD-user-w . 2005-11-26T06:46:29Z Ollin 748x501 (54894 Bytes) A person whose nickname is “It'sJustMe“ made this file in Microsoft Visio. the creator of this work, hereby release it into the public domain.
2 Chloroplast envelope. 2.1 Outer membrane. ... 3.1 Thylakoid space (lumen) 3.2 Thylakoid membrane. 4 Stromal thylakoids (lamellæ or frets) 5 Granal thylakoids. 6 ...
The reaction center is in the thylakoid membrane. It transfers absorbed light energy to a dimer of chlorophyll pigment molecules near the periplasmic (or thylakoid lumen) side of the membrane. This dimer is called a special pair because of its fundamental role in photosynthesis. This special pair is slightly different in PSI and PSII reaction ...
H + ions from the lumen of the thylakoid into the cytosol of a cyanobacterium or the stroma of a chloroplast. A steep H + gradient is formed, which allows chemiosmosis to occur, where the thylakoid, transmembrane ATP-synthase serves a dual function as a "gate" or channel for H + ions and a catalytic site for the formation of ATP from ADP + a PO ...
Photosynthesis is also a process that Chlororespiration interacts with. [2] If photosynthesis is inhibited by environmental stressors like water deficit, increased heat, and/or increased/decreased light exposure, or even chilling stress then chlororespiration is one of the crucial ways that plants use to compensate for chemical energy synthesis.
Stroma, in botany, refers to the colorless fluid surrounding the grana within the chloroplast. [1] Within the stroma are grana (stacks of thylakoid), the sub-organelles where photosynthesis is started [2] before the chemical changes are completed in the stroma. [3] Photosynthesis occurs in two stages.