Which is the main light-absorbing pigment for photosynthesis
What are the main photosynthetic pigments
All of the sugar produced in the photosynthetic cells of plants and other organisms is derived from the initial chemical combining of carbon dioxide and water with sunlight.
What are the main photosynthetic pigment …
Other bacteria use sunlight for different chemical purposes. Splitting water — as plants do — requires a lot of input energy, so some organisms "make a living" off less demanding reactions. For example, green sulfur bacteria use hydrogen sulfide as an "electron donor" in place of water. This process and others like it are referred to as anoxygenic photosynthesis because no oxygen is produced. The associated pigments are called bacteriochlorophylls.
What is the main photosynthesis pigment
Plants and algae use the energy absorbed by chlorophyll a to split water molecules. This splitting allows electrons from the water to be "donated" towards the reduction of carbon dioxide into carbohydrates (i.e. sugars). The byproduct of these reactions is oxygen, which is why the process is called oxygenic photosynthesis.
the main pigment employed in anoxygenic photosynthesis.
What this tells us is that photosynthesis is not a one-size-fits-all solution, and the pigments used on a different planet will likely be adapted to local conditions. To help imagine what these alien pigments might be, Kiang has started the Biological Pigments Database. This contributes a biological component to the NASA Astrobiology Institute Virtual Planetary Laboratory’s Spectral Database, which brings together stellar radiation spectra, molecular line lists for atmospheric radiative transfer, and now biological pigments.