. Plant propagation; greenhouse and nursery practice. FIG. 140— CUTTING ONDAHLIA TUBER i)A.\ i;.:xTS Axn conclusions i^S rot and parsnip show that the presence of reserve material is no(il)stacle to success. Those of tomato on potato, annual sunflower1111 Jerusalem artichoke, etc., show that the formation of tuberson the stock takes place even when the cion is incapable of pro-ducing tubers itself. In grafting in September a young cabbage ona purple-topped turnip, which would have begun to thicken its root,in October, the thickening came in the April following, when thecion became
. Plant propagation; greenhouse and nursery practice. FIG. 140— CUTTING ONDAHLIA TUBER i)A.\ i;.:xTS Axn conclusions i^S rot and parsnip show that the presence of reserve material is no(il)stacle to success. Those of tomato on potato, annual sunflower1111 Jerusalem artichoke, etc., show that the formation of tuberson the stock takes place even when the cion is incapable of pro-ducing tubers itself. In grafting in September a young cabbage ona purple-topped turnip, which would have begun to thicken its root,in October, the thickening came in the April following, when thecion became plethoric. It is, then, the cion which by its mode of nu-trition commands the function of reserve material in the FIG. 141-S\VELLINGS DUE TO GRAFTAGE 1. Large growing apple on small growing stock. 2. Swelling of tissues at pointof union. 3. Pear on small growing stock. The inverse graft of plants susceptible of forming tubers on aplant which does not yield tubers may be realized. Daniel suc-ceeded in grafting Hclianthus loetiftonis, a species with an enlargedrhizome, on H. Animus, an annual species which does not formtubers. The cion grown entirely above the soil was unable toform tubers. The reserves passed into another form in the stock,which took a development altogether abnormal and became veryligneous. Potato grafted on eggplant and on tomato has been ob-served to form aerial tubers and thus store up its reserve material. 215. Analogy in habitat seems to be a more or less important fac-tor. Thus Phlox dccnssata, which grows in humid soils, has notbeen successfully grafted by Daniel on P. sitbiilata, which grows ondry soils; though parsley, which prefers a dry soil, succeeds whengrafted with
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectplantpropagation
