. Plant propagation : greenhouse and nursery practice . Plant propagation. 1U2 I'LAXT I'KOJ'AGATIUN 1-oth water sprouts and suckers commonly follow over- pi uning'. They show an undesirable loss of balance between root system and top. In cold climates water sprouts often winterkill. Therefore, the}- are best re- moved promptly and with clean cuts. Where practical, careful root pruning will tend to overcome this condition. 150. Origin of roots in cuttings.—In making stem cut- tmg-s the usual practice is to "cut to a node" ; i. e., stems are cut just below buds. The reason for this is
. Plant propagation : greenhouse and nursery practice . Plant propagation. 1U2 I'LAXT I'KOJ'AGATIUN 1-oth water sprouts and suckers commonly follow over- pi uning'. They show an undesirable loss of balance between root system and top. In cold climates water sprouts often winterkill. Therefore, the}- are best re- moved promptly and with clean cuts. Where practical, careful root pruning will tend to overcome this condition. 150. Origin of roots in cuttings.—In making stem cut- tmg-s the usual practice is to "cut to a node" ; i. e., stems are cut just below buds. The reason for this is that with most plants a larger pro- portion of cuttings will "strike root" than if the cuts are made farther away from the nodes. True buds of themselves, however, exercise no in- fluence in the production of roots, for if buried in the earth or other me- dium, they do not grow. The reason roots form best near the nodes is believed to be that stem tissues at such points are richer in plant food stored there to assist the bud should it start growth. \\'hile many steins made into cuttings will root at any point, it is a rule that roots arise most freelv at or very near the bases of the cuttings, whether "cut to a node" or not. Root origin is always in adventitiotis buds, usually fr)rmed beneath the bark or the callus, but always in the primarv (meristematic) tissue, the center of the cambium laver. This tissue is composed of undifferentiated cells. Adventitious buds may develop in any part of a plant. FIG. 91—FORMATION OF ROOTS Grape cuttings showing callus. 2. Others showing Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kains, M. G. (Maurice Grenville), 1868-1946. New York : Orange Judd Company
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