Physiological and Anatomical Characterization of a Late-storage Root-forming Mutant of Sweetpotato

摘要: ADDITIONAL INDEX WORDS. Ipomoea batatas, cytokinin, zeatin riboside, grafting ABSTRACT. A late-storage root-forming mutant ('KM95-A68') of sweetpotato (Ipomoea batatas (L.) Poir.) was character- ized to clarify the genetic and physiological mechanisms storage root formation. This originated from a somaclonal mutation 'Kokei No. 14'. Storage roots 'KM95-A68' are rare and, when formed, develop 2 or 3 weeks later than those 14' which it originated. Morphological characteristics canopy leaf photosynthetic rates were similar No apparent differences observed in anatomy cross sections An increase riboside (ZR) levels at Root ZR differed between 'KM95-A68'. The onset delayed by comparison Maximum 2.2 times higher appeared be factor formation Results reciprocal grafts indicated that late characteristic is arises itself.