Photosynthesis. Energy storage. As it is formed ATR

you are: Photosynthesis. Energy storage

We in the statement recognised that a basis of synthesis ATR carrying over elektronov is. Recently, however, wide recognition was received hemiosmoticheskaja by the theory of English researcher Peter Mitchell in which basis representation about moving of protons is necessary.

We Will consider synthesis ATR in hloroplastah (fig. 4.13) where it is easy to track its communication with ' the Z-scheme ' light reactions of photosynthesis (fig. 4.12). The photosynthetic chain of carrying over elektronov takes places in tilakoidnoj to a membrane. One of carriers being here elektronov, plastohinon, transfers along with elektronami and protons (N +-ions), moving them through tilakoidnuju a membrane in a direction outside inside. Consequence of it is increase of concentration of protons inside tilakoida and occurrence of a considerable gradient rn between external and an inside tilakoidnoj membranes: from the inside environment appears more sour, than with external. This raised acidity inside tilakoida even more amplifies owing to fotoliza at which elektrony and О2 leave, and protons collect. The considerable gradient rn between internal and lateral aspect tilakoidnoj membranes represents a potential energy source. This energy can be used at return moving of protons from within outside on special channels in ' gribovidnyh vyrostah ',

Being on lateral aspect tilakoidnoj membranes. In channels there is a fiber, the so-called factor of interface (ФС1), capable to carry out synthesis ATR. This fiber, generally speaking, represents AtR-azu, t. e, enzyme, katalizirujushchy disintegration ATR, but in the presence of corresponding energy it can katalizirovat and synthesis of the given connection. Energy is delivered by the protons flowing through a membrane, through legs and heads gribovidnyh vyrostov. All as a whole reminds transformation of mechanical energy in electric in the water-wheel. protons flow on channels in gribovidnyh vyrostah until their concentration inside tilakoida exceeds external concentration and, means, while elektrony under the influence of light absorbed by a chlorophyll move on a chain of carriers. On everyone two transferred on a chain elektrona inside tilakoida collects approximately four protons. On each three protons which are coming back (with participation of the factor of interface) back outside, one molecule ATR is synthesised.

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