A GROWTH CABINET PROVIDING VARIABLE SPECTRAL PHOTON DISTRIBUTIONS AT HIGH FLUENCE RATES

Authors

  • J. E. HUGHES,

    1. Plant Physiology Section, Department of Physiology and Environmental Science, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics., UK
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    • *

      Current address: Biologisches Institut II, SchänzlestraßBe 1, D-7800 Frieburg, West Germany.

  • L. HEATHCOTE,

    1. Plant Physiology Section, Department of Physiology and Environmental Science, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics., UK
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    • Deceased April 1984.

  • K. BAMBRIDGE,

    1. Plant Physiology Section, Department of Physiology and Environmental Science, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics., UK
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  • C. R. BLACK

    1. Plant Physiology Section, Department of Physiology and Environmental Science, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics., UK
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Summary

A plant growth cabinet providing a flexible facility for photomorphogenic and photoperiodic research is described. The growth chamber is divided into quarters which are optically isolated, and has a recirculating air-conditioning system. The various light sources and filters available are discussed in relation to their desirable features. The chosen sources of white light (metal halide discharge lamps) are capable of generating approximately 800 μmol m−2 s−1 (400 to 700 nm). Tungsten-halogen filament lamps are used to provide longer wavelengths. Infra-red filters (acrylic sheet and water) reduced heat loading to a negligible level. Data are presented for internode length in plants of Chenopodium album L. grown under different fluence rates of supplementary far-red light in the new cabinet.

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