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1 results

  • Smallseed Dodder (Cuscuta planiflora) Gravitropism in Red Light and in Red Plus Far-red

  • Gregory L. Orr, Mustapha A. Haidar, Deborah A. Orr
  • Journal:
    Weed Science / Volume 44 / Issue 4 / December 1996
    Published online by Cambridge University Press:
    12 June 2017, pp. 795-796

  • White light-grown seedlings of smallseed dodder were cyclically irradiated from above with red light for 4 h followed by red plus far-red for 4 h. Tracings of initially nearly vertical, white light-grown seedlings were made from time-lapsed video images after four cycles of red light followed by red plus far-red. Stems of seedlings cycled into red light were negatively gravitropic and stems of seedlings then cycled into red plus far-red became photoreversibly, positively gravitropic. Observations suggest gravitropic sign reversal in smallseed dodder is regulated by photochrome.