. Plant propagation; greenhouse and nursery practice. - growth. \\Miy? Possibly because ofphysiological unlikeness or aversion (if such a term maybe permitted). The wound heals slowly or poorly; looseprimary or scar instead of stronger tissue fills the spaceand weakness follows. Clairgeau pear on qumce anddomestica plum on peach are familiar examples. But set-ting aside such cases, if stock and cion are congenial toeach other and if the cion (or bud) grows at all, theunion should be good. Poor manipulation will causemany failures of grafts to grow, but will rarely affectstrength of union in gr
. Plant propagation; greenhouse and nursery practice. - growth. \\Miy? Possibly because ofphysiological unlikeness or aversion (if such a term maybe permitted). The wound heals slowly or poorly; looseprimary or scar instead of stronger tissue fills the spaceand weakness follows. Clairgeau pear on qumce anddomestica plum on peach are familiar examples. But set-ting aside such cases, if stock and cion are congenial toeach other and if the cion (or bud) grows at all, theunion should be good. Poor manipulation will causemany failures of grafts to grow, but will rarely affectstrength of union in grafts which live. All degrees of])liysical strength may be seen in graft unions from those k* ■-1^- ill. FIG. 126—PROPAGATION IN GREENHOUSES 1, Orchids on benches and in hanging pots. 2. Cyclamen large enough for Geraniums by the 10,000 in a large commercial plant. 142 GRAKTAci:—(;i:.\i:kal e-()Xsii)i:KATTONS 143 stronger than tlie coiitis^nous parts of the same stems tothose incai)a])lc of hohlin,^- themselves in place. 201. Physical strength of graft unions. From thestandpoint of plant anatomy and physiology grafts ma\-be weak in several ways. 1, Physical weakness at pointof union; 2, cion leaves may find it difficult to elab-orate sap taken up by stock roots; 3, stock roots mayiind difficulty in assimilating plant food elal)orated by theleaves; 4, there may bean interruption in theupward flow of sap dueto faulty connection ofthe xylem (203) vesselsat the point of union ; 5,a similar one in thedownward flow, due tofaulty union of thephloem (202) ; 6, thequantity of sap taken upby the root may be toomuch or too little for theproper supply of thecion; 7, the amf)unt ofelabora
Size: 1630px × 1533px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectplantpropagation
