Potato Research

, Volume 31, Issue 2, pp 257–268 | Cite as

Effects of photoperiod, night temperature, and irradiance on flower production in the potato

  • A. D. Turner
  • E. E. Ewing


The influence of three environmental factors on the incidence of arrested floral development (bud abortion) in different potato clones was studied. The first experiment measured flower production in growth chambers when a 12-h photoperiod was extended by 4 h dim light. The second experiment, also in growth chambers, contrasted flower production under night temperatures of 10°C and 20°C (day temperature 30°C, photoperiod 12 h). A third experiment examined bud abortion in plants grown in the greenhouse under shade cloths which reduced incoming irradiance to ca. 50% of normal. Both the longer photoperiod and warmer night temperature promoted flower production, in some of the clones tested, by reducing bud abortion. Reduced irradiance completely suppressed flower development (but not bud formation) in all clones. In all experiments, the number of flowers developing to anthesis was significantly correlated with shoot dry weight, indicating that treatments which promote shoot growth reduce the incidence of bud abortion.

Additional keywords

flower bud abortion true potato seed shading tuberization Solanum tuberosum L. 


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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • A. D. Turner
    • 1
  • E. E. Ewing
    • 1
  1. 1.Department of Vegetable CropsCornell UniversityIthacaUSA

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