the Green plant - not simply car working on a solar energy: the structure of this car is partially defined by quantity and quality of radiant energy which it receives. On the sprout which has been grown up in the dark, deep influence render absorption even few quanta of light: speed and a direction of growth, leaves and a stalk change, the bend of a sheet small pillow (pljumuly) is straightened, develop epidermalnye hairs, there are changes in pigmentation of leaves and a stalk and in many details of internal anatomy of a sprout. During later period of a life on light depend flowering and plodoobrazovanie. At last, subsidence of leaves, transition of kidneys and seeds in a condition of rest and an ageing phenomenon is too a consequence of received before light and other signals.

The Various processes mediating influence of light on the form of plants, obobshchenno have been named fotomorfogenezom. Chlorophyll and various auxiliary pigments of the photosynthetic device do not play these processes of a leading role: it belongs fikobilinovomu to a pigment to phytochrome and any yet not characterised yellow substance - is possible, flavoproteidnomu to enzyme. The maintenance of these pigments in plants is not enough; therefore it is not surprising that the quantities of energy necessary for saturation of corresponding photoprocesses, on some usages more low, than at photosynthesis. products of these light reactions do not regulate growth of plants stehiometricheski as it does the sugar formed at photosynthesis. More likely they influence such parametres as permeability of membranes, function of genes and activity of the enzymes, the changed which condition much more strengthens action of each absorbed quantum. Thus, while at photosynthesis of 8-10 quanta of light it is necessary for liberation only one molecule О2, the same number of quanta on one cage can define completely reproductive destiny of a plant or a direction of growth of all stalk. in this chapter we learn about pigments, photoprocesses and the further physiological mechanisms participating in the control fotomorfogeneza.

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