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Scientists discover genetic 'off switch' in legume plants that limits biological ability to source nutrients
"By increasing the nitrate levels available to the model legume ... This led to the secondary discovery that zinc levels play a role in triggering FUN to become active and shut down nitrogen ...
University of Wyoming3y
Nitrate Broth
Zinc will convert any remaining NO 3- to NO 2- thus allowing nitrate I and nitrate II to react with the NO 2- and form the red pigment (a verified negative result). If no color change occurs upon ...