Table I.

Results of grafting scions from different photoperiodic tobacco species onto potato stocks

Tobacco ScionSDLD
Tobacco scion floweringPotato stock tuberizingTobacco scion floweringPotato stock tuberizing
Mammoth++
Xanthi++++
Sylvestris++

The grafted plants were kept in LD or SD. Mammoth is a short-day species, Xanthi is a day-neutral species, and Sylvestris a long-day species. (Summarized from Ewing, 1995.) +, Tuberization occurred; −, tuberization did not occur.