Vegetative tissue plastids

The response of A. thaliana to Cu deficiency in roots and vegetative tissue is well established (Fig. 8.13). When Cu is limiting, cytosolic and plastid Cu/Zn SODs are downregulated and FeSOD is upregulated. The reverse is... 

Each plant cell manufactures its own fatty acids, since there is no lipid transport in plants. The synthesis begins with acetate which is formed from pyruvate, formed from phosphoglycerate in the Calvin cycle in leaf tissue or via degradation of sugars in seeds or fruits. De novo synthesis of fatty acids takes place in the chloroplasts of vegetative tissues or in plastids of other plant tissues. Acetate is first esterified to the -SH function of coenzyme A (CoA) via an enzyme, acetyl CoA synthetase. Coenzyme A is an adenosine derivative attached to a 4 -phosphopantetheine moiety, a chemical subunit idilch is ubiquitous in the metabolism of fatty acids. 

Carotenoids are important and are the most widespread Hpophihc pigments of many fruits and vegetables. They occur in aU photosynthetic plant tissues, where they are found as photochemicaUy active components of plastids called chromoplasts. Carotenoids are often accompanied by other pigments, for example by anthocyanins in peaches and apricots. The presence of carotenoids in the green parts of plants is often masked by chlorophyll pigments. 

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