INFLUENCE OF TEMPORARY ANOXIA BY SUBMERGING IN WATER ON LIGHT-INDUCED GREENING AND GLYCOALKALOID FORMATION OF POTATO TUBERS
Abstract
Temporary anoxia created by submerging potato tubers in water completely inhibited light-induced greening and glycoalkaloid formation of Russet Burbank, White Rose and Pontiac cultivar. Preanoxia vacuum treatment of the tuber has the same effect but hastened rottenness of the tubers. Anoxia treatment also inhibited the respiration of potato tissue. Partial exposure of the surface of anoxia tubers to air reduced the inhibition. The inhibition of the light-induced greening by anoxia condition was due to inhibition of tuber respiration. The light absorption by the water used to create anoxia condition did not contribute to the inhibition of light-induced greening. The duration which tubers could tolerate anoxia condition depended upon the cultivar and the physical condition of the tubers. Incorporation of 100 to 1000 ppm sodium hypochlorite or daily replacing with fresh water effectively improved incubation stability and reduced rottenness.