The present paper reports data on the biological activity of nanocompositions based on a C ₆₀ -L-threonine (C ₆₀ -Thr) derivative. These nanocompositions promote the nonspecific resistance of plants to the action of stress factors (ultraviolet radiation, pesticides, and phytopathogens). Additionally, we determined the perspectives of the C ₆₀ -Thr adduct application in the cultivation of plants due to the decrease of the pesticide load on the environment. The biological study of C ₆₀ -Thr revealed the plant growth-stimulating ability due to its influence on the photosynthetic apparatus activity and antioxidant properties.