Genetic Evidence That the Red-Absorbing Form of Phytochrome B Modulates Gravitropism in Arabidopsis thaliana.

Plant physiology ·Vol. 103 ·No. 1 ·1993-09-00 ·Pages 15-19

Liscum E, Hangarter RP

Abstract

Hypocotyls of dark-grown Arabidopsis seedlings exhibit strong negative gravitropism, whereas in red light, gravitropism is strongly reduced. Red/far-red light-pulse experiments and analysis of specific phytochrome-deficient mutants indicate that the red-absorbing (Pr) form of phytochrome B regulates normal hypocotyl gravitropism in darkness, and depletion of Pr by photoconversion to the far-red-absorbing form attenuates hypocotyl gravitropism. These studies provide genetic evidence that the Pr form of phytochrome has an active function in plant development.

Authors & Affiliations

2 authors, click to expand affiliations / ORCID

Liscum E.

Department of Plant Biology, The Ohio State University, Columbus, Ohio 43210.

Hangarter R. P.

References (11)

11 references, click to expand

Light-regulated gravitropism in seedling roots of maize.
Plant Physiol. 1987;83:241-3 PMID: 11539030
Different Roles for Phytochrome in Etiolated and Green Plants Deduced from Characterization of Arabidopsis thaliana Mutants.
Plant Cell. 1989 Sep;1(9):867-880 PMID: 12359912
Blue and Green Light-Induced Phototropism in Arabidopsis thaliana and Lactuca sativa L. Seedlings.
Plant Physiol. 1985 Jan;77(1):248-51 PMID: 16664021
Genetic separation of phototropism and blue light inhibition of stem elongation.
Plant Physiol. 1992 Sep;100(1):267-71 PMID: 11538049
Gravitropism in a starchless mutant of Arabidopsis: implications for the starch-statolith theory of gravity sensing.
Planta. 1989;177:185-97 PMID: 11539758
Effect of red light on geotropism in pea epicotyls.
Plant Physiol. 1979 Jan;63(1):218-20 PMID: 16660684
Photochemical and Nonphotochemical Reactions of Phytochrome in vivo.
Plant Physiol. 1966 Mar;41(3):467-74 PMID: 16656277
The hy3 Long Hypocotyl Mutant of Arabidopsis Is Deficient in Phytochrome B.
Plant Cell. 1991 Dec;3(12):1263-1274 PMID: 12324590
Mutations in the gene for the red/far-red light receptor phytochrome B alter cell elongation and physiological responses throughout Arabidopsis development.
Plant Cell. 1993 Feb;5(2):147-57 PMID: 8453299
hy8, a new class of arabidopsis long hypocotyl mutants deficient in functional phytochrome A.
Plant Cell. 1993 Jan;5(1):39-48 PMID: 8439743
Phytochrome: a light-activated molecular switch that regulates plant gene expression.
Annu Rev Genet. 1991;25:389-409 PMID: 1812812

Article Info

Journal

Plant physiology

Abbr.

Plant Physiol

ISSN

1532-2548

DOI

10.1104/pp.103.1.15

Published

1993-09-00

Pages

15-19

Language

English

Region

United States

NLM ID

0401224

PMCID

PMC158941

External Links

PubMed source DOI: 10.1104/pp.103.1.15 PMC Full Text View journal details

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Genetic Evidence That the Red-Absorbing Form of Phytochrome B Modulates Gravitropism in Arabidopsis thaliana.

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