Planta

, Volume 131, Issue 2, pp 109–114

Photocontrol of petiole elongation in light-grown strawberry plants

  • Daphne Vince-Prue
  • C. G. Guttridge
  • M. W. Buck
Article

DOI: 10.1007/BF00389978

Cite this article as:
Vince-Prue, D., Guttridge, C.G. & Buck, M.W. Planta (1976) 131: 109. doi:10.1007/BF00389978

Summary

The mode of phytochrome control of elongation growth was studied in fully-green strawberry (Fragaria x Ananassa Duch.) plants. Petiole growth showed two distinct types of response to light. In one, the end-of-day response, petioles were lengthened by low-intensity far-red irradiation for 1 h immediately following the 8 h photoperiod. The response was little or no greater with prolonged exposure and less when the start of far-red was delayed. It was already evident in the first leaf to emerge after treatment began. With the development of successive leaves a second, photoperiodic, type of response appeared, in which petioles lengthened following only prolonged exposure to red, far-red, mixtures of the two, or tungsten lighting, all at low levels of intensity. As with the inhibition of flowering in previous experiments, irradiation with red light during the second half of the otherwise long dark period gave the greatest response.

Abbreviations and Symbols

FR

far-red light

HIR

high irradiance response

R

red light

Pr

phytochrome in the red light absorbing form

Pfr

phytochrome in the far-red light absorbing form

SDP

short-day plant

LDP

long-day plant

PAR

photosynthetically active radiation

Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • Daphne Vince-Prue
    • 1
  • C. G. Guttridge
    • 2
  • M. W. Buck
    • 3
  1. 1.Department of Botany, Plant Science LaboratoriesUniversity of ReadingReadingU.K.
  2. 2.Department of Agriculture and HorticultureUniversity of Bristol, Research StationBristolU.K.
  3. 3.Department of Agriculture and HorticultureUniversity of ReadingReadingU.K.