Changes in Photosensitive Stem Growth in Intact Peas Following Irradiation 1

AUTOR(ES)

Elliott, William M.

RESUMO

Etiolated pea seedlings given a short red-light pretreatment followed by 30 hr of darkness no longer showed a typical red-light inhibition of internode elongation. The induction of phytochrome-insensitive growth was itself mediated by phytochrome, since far-red light reversed the effect of the short red-light pretreatment. Peas grown in white light showed a similar insensitivity to red light. However, in this instance the phytochrome system exerted some control over internode elongation since far-red light promoted growth slightly, and this effect was red-reversible.

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