1), you will note that they do not match. 2) with the corresponding absorption spectrum of chlorophyll A (Fig. The result of the activity of main pigments and auxiliary pigments is shown graphically in the action spectrum (Fig. In order to make accurate statements about the light absorption of different pigments, scientists undertook a complex measurement process using a spectrophotometer where each wavelength was tested for the specific absorption rate. The action spectrum is the sensitivity curve of the light on plant's photosynthesis. The auxiliary pigments transfer the absorbed energy on to chlorophyll A, in fact they only widen the action spectrum. Auxiliary pigments, as shown here the beta-carotene, use smaller portions of the light spectrum with absorption peaks at 400-500 nm.Ĭhlorophyll A is the main pigment the conversion of CO 2 into carbohydrates. Chlorophyll B uses a similar range, with absorption peaks at about 453 nm and 642 nm. Green and far-red light however, are little or not absorbed. 1 chlorophyll A absorbs the light in the blue and red wavelengths, with absorption peaks at 430 nm and 662 nm. The two most important chlorophylls are chlorophyll A and chlorophyll B pigments as well as other auxiliary pigments, such as the carotenoids. The light is absorbed with the aid of the pigment chlorophyll. The plants store the collected energy as carbohydrates, so that the sunlight basically serves as food for the plant. More simply, it is a process that all plants use, to collect the energy from the sunlight. The most important of these processes is the photosynthesis: the basis for plant growth and development.
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