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Phytochrome regulation of pea phototropin

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journal contribution
posted on 2023-05-16, 14:55 authored by Elliott, RC, Platten, JD, Watson, JC, James ReidJames Reid
Type 1 phototropin, one of the blue light receptors responsible for phototropism, is encoded in peas by at least two genes, PsPHOT1A and PsPHOT1B (formerly PsPK4 and PsPK5), both of which are more similar to Arabidopsis PHOT1 than to Arabidopsis PHOT2. We show here that PsPHOT1B encodes a full-length phototropin, whose expression pattern suggests that Psphot1b is the predominant phot1-type phototropin in etiolated seedlings. The gene encoding the other type 1 phototropin, PsPHOT1A, is expressed at low levels, with its highest levels in the leaves and stems of more mature, light-grown plants. Studies with phyA, phyB and the phyAphyB double mutants show that phyA and phyB have partially redundant roles in the reduction of PsPHOT1B expression under red light.

History

Publication title

Journal of Plant Physiology

Volume

161

Pagination

265-270

ISSN

0176-1617

Department/School

School of Natural Sciences

Publisher

Urban & Fischer Verlag

Place of publication

Germany

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the environmental sciences

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