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Several aspects of growth, development and sapogenin yield of tubers of Dioscorea spiculiflora

, : Several aspects of growth, development and sapogenin yield of tubers of Dioscorea spiculiflora. Econ Bot 18(4): 323-328

Tubers of D. spiculiflora and some characteristics of their growth are described. Direct correlation between original weight of tuber piece and subsequent tuber growth, and numbers of nodes and leaves produced was recorded. Plants grown in peat rarely exhibited nutritional deficiency but responded to regular applications of fertilizer by great increases in shoot and tuber growth. Sapogenin analyses of tubers revealed (a) considerably higher content of sapogenins in original tuber pieces dug in Mexico than in subsequent 1 - and 2-year-old tuber tissue developed from these pieces when grown in peat in the greenhouse at Glenn Dale, Maryland; (b) higher sapogenin content in the outer 1-1 1/2 mm layer of tubers than in the inside tissue; (c) no significant difference in sapogenin content of tissue from ventral and dorsal sides of tubers; and (d) no difference in sapogenin content of tubers from pistillate and staminate plants.


DOI: 10.1007/bf02862718

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