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Multiple Signaling Pathways Control Tuber Induction in Potato

Stephen D. Jackson

Published January 1999. DOI: https://doi.org/10.1104/pp.119.1.1

Article Figures & Data

Figures

  • Fig. 1.
    Fig. 1.

    Solanum demissum plants grown in noninducing long-day (left) or inducing short-day (right) conditions.

  • Fig. 2.
    Fig. 2.

    The tuberization response of cuttings that have been induced to differing degrees. From left to right, noninduced (no stolon or tuber) to strongly induced (sessile tuber). Photo courtesy of E. Ewing (Cornell University, Ithaca, NY).

  • Fig. 3.
    Fig. 3.

    A, Tuberization response of S. tuberosum ssp. andigena to different photoperiodic treatments. White boxes, Lights on; black boxes, lights off. B, Tuberization response to night breaks of red (R) and far-red (FR) light.

  • Fig. 4.
    Fig. 4.

    Tuberization response of two wild-type (left) and two antisense PHYB (right) potato plants grown in LD. Tuber formation occurred only on the antisense PHYBplants. Notice the lack of stolon formation.

  • Fig. 5.
    Fig. 5.

    Graftings of wild-type and antisensePHYB plants maintained in LD. A wild-type scion grafted onto a wild-type stock (left) did not tuberize, whereas an antisensePHYB scion could induce a wild-type stock to tuberize in the long-day conditions (right).

  • Fig. 6.
    Fig. 6.

    Environmental factors and signaling molecules affecting the induction of tuberization. The transduction pathway still has to be defined.  

Tables

  • 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.

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    Multiple Signaling Pathways Control Tuber Induction in Potato
    Stephen D. Jackson
    Plant Physiology Jan 1999, 119 (1) 1-8; DOI: 10.1104/pp.119.1.1
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