Question #d66c6

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Nov 10, 2017

Plants and photosynthetic microorganisms share a common ancestry in evolution.


All living plants can trace their ancestry to the first photosynthetic organisms that emerged on Earth. The modern descendants of those early microorganisms are phytoplankton.

Apart from a common ancestry plants are in strong symbiotic relationship with all kinds of microorganisms.

The best known example is the relationship between Rhizobacteria that trap nitrogen from air and make it available to plants as nitrates.
Nitrates are essential for the synthesis of purines and pyrimidines that are part of nucleic acid. They are also required in protein synthesis.