Abstract
Electrical resistances of living shoots of 13 apple rootstocks varying in vigor from very dwarfing to very vigorous were measured. A portable, battery-powered Bouyoucos Model C bridge was used, equipped with needle electrode probes that completely penetrated the bark. Data obtained on shoots of the previous year's growth revealed a direct relationship between the electrical resistance of shoots and the known rootstock effect on scion vigor. Dwarfing and vigorous rootstocks had low and high electrical resistance respectively. When resistance was plotted against time there was a close resemblance to curves for daily periodicity of transpiration.
Publisher
Canadian Science Publishing
Cited by
17 articles.
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