. Contributions from the Botanical Laboratory of the University of Pennsylvania. Plants; Plants -- Pennsylvania. / GRRPH I- nCEPLt PUnCTURE n- PISTILLEP WRTER Hr-UTHlUn CRRBOriRTE 90 eo 70 60 £0 40 30 20 10 0 0--0 I -=^rZ 'CSGSJfI>- Tnternoda bolov Injection Q Xntarnede Injaofd. 0 Intsrnoda above Injection Q- —— ——^ The first date given t» that upon which th9 Injeotton was luidtf. Mea$itrement» made lote in i/te $uaKtr afiou no jiroittfi ooer that ahott/n tn thgse graphs.. Discussion of the Graphs—Polygonum Needle Puncture Controls In addition to untreated plants, a series was run on plan
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. Contributions from the Botanical Laboratory of the University of Pennsylvania. Plants; Plants -- Pennsylvania. / GRRPH I- nCEPLt PUnCTURE n- PISTILLEP WRTER Hr-UTHlUn CRRBOriRTE 90 eo 70 60 £0 40 30 20 10 0 0--0 I -=^rZ 'CSGSJfI>- Tnternoda bolov Injection Q Xntarnede Injaofd. 0~~ Intsrnoda above Injection Q- —— ——^ The first date given t» that upon which th9 Injeotton was luidtf. Mea$itrement» made lote in i/te $uaKtr afiou no jiroittfi ooer that ahott/n tn thgse graphs.. Discussion of the Graphs—Polygonum Needle Puncture Controls In addition to untreated plants, a series was run on plants that had been punctured as if making an injection, and the wounds similarly protected with grafting wax. It will be seen that the punctured internode is longer than the internode below, as in the normal stem. Compare with the injected specimens. Specimens 57, 58, 59, 60, 61. Distilled Water Injections The injected internode is seen to be the shortest of all. The plants seem to have averaged somewhat older than the preceding. Specimens 62, 63, 64, 65, 66.. 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 work.. University of Pennsylvania. Botanical Laboratory. Philadelphia : University of Pennsylvania Press