Chlorophyll Chlorosis can also be caused by pathogens including viruses, bacteria and fungal infections, or sap-sucking insects. Anthocyanins are other plant pigments. The absorbance pattern responsible for the red color of anthocyanins may be complementary to that of green chlorophyll in photosynthetically active tissues such as young "Quercus coccifera" leaves. It may protect the leaves from attacks by plant eaters that may be attracted by green color. The chlorophyll maps show milligrams of chlorophyll per cubic meter of seawater each month. Places where chlorophyll amounts were very low, indicating very low numbers of phytoplankton, are blue. Places where chlorophyll concentrations were
Chlorophyll linear relationship of chlorophyll content when compared to chemical testing. The ratio "F"/"F" provided a correlation value of "r" 0.96 compared to chemical testing in the range from 41 mg m up to 675 mg m. Gitelson also developed a formula for direct readout of chlorophyll content in mg m. The formula provided a reliable method of measuring chlorophyll content from 41 mg m up to 675 mg m with a correlation "r" value of 0.95. In plants, chlorophyll may be synthesized from succinyl-CoA and glycine, although the immediate precursor to chlorophyll "a" and "b" is protochlorophyllide. In Angiosperm plants,