Chlorophyll is a magnesium porphyrin compound, including chlorophyll a, b, c, d, f, protochlorophyll and bacterial chlorophyll. Chlorophyll is not very stable and will be decomposed by light, acid, alkali, oxygen and oxidant. Under acidic conditions, chlorophyll molecules can easily lose magnesium in porphyrin ring and become pheophytin. Chlorophyll has many uses, such as hematopoiesis, providing vitamins, detoxification and disease resistance.
Extended data:
Chlorophyll absorption spectrum has two strongest regions: one is in the red part with a wavelength of 640nm-660nm, and the other is in the blue-purple part with a wavelength of 430nm-450nm. It absorbs less other light, among which it absorbs the least green light. Because chlorophyll absorbs the least green light, the solution of chlorophyll is green.
The acetone extract of chlorophyll is turquoise under transmitted light and reddish brown under reflected light. The fluorescence of chlorophyll solution can reach about 10% of the absorbed light. However, the fluorescence of fresh leaves is low, accounting for about 0. 1%- 1% of the absorbed light.
Fluorescence effect is widely used in plant physiology. This effect can be used to study the stress resistance physiology of plants. Because the chlorophyll of plants will change under adversity, the study of its fluorescence can be used as an indicator of the degree of plant stress under adversity. In addition, there is phosphorescence effect. When fluorescence appears, the light source is interrupted immediately, and a weak red light can be seen in a short time with sensitive optical instruments.
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Baidu Encyclopedia-Plants (Eukaryotes have chlorophyll and cell walls that can feed themselves)