Furthermore, there is much to learn about how exudate localization and composition varies in response to stress.  Root exudates are chemically diverse secretions composed of organic acids, amino acids, proteins, sugars, and other metabolites.  Furthermore, ninhydrin paper is stable, showing consistent color changes up to 2 weeks after printing. 
HERM
Furthermore, there is much to learn about how exudate localization and composition varies in response to stress.  Root exudates are chemically diverse secretions composed of organic acids, amino acids, proteins, sugars, and other metabolites.  Furthermore, ninhydrin paper is stable, showing consistent color changes up to 2 weeks after printing. 
THERM