1998
DOI: 10.1105/tpc.10.6.889
|View full text |Cite
|
Sign up to set email alerts
|

An Arabidopsis Mutant Hypersensitive to Red and Far-Red Light Signals

Abstract: A new mutant called psi2 (for p hytochrome si gnaling) was isolated by screening for elevated activity of a chlorophyll a / b binding protein-luciferase ( CAB2-LUC ) transgene in Arabidopsis. This mutant exhibited hypersensitive induction of CAB1 , CAB2 , and the small subunit of ribulose-1,5-bisphosphate carboxylase ( RBCS ) promoters in the very low fluence range of red light and a hypersensitive response in hypocotyl growth in continuous red light of higher fluences. In addition, at high-but not low-light f… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

1
52
0

Year Published

1999
1999
2018
2018

Publication Types

Select...
6
2

Relationship

2
6

Authors

Journals

citations
Cited by 93 publications
(53 citation statements)
references
References 76 publications
(84 reference statements)
1
52
0
Order By: Relevance
“…In this double mutant, a clear reversion of the phenotypic reduction of cell elongation in the psi2-DS1 mutant was observed in continuous white light (Figure 4A), as well as in continuous low red light (Figure 4B), a discriminating condition for the involvement of both phyA and phyB in the psi2 phenotype [26]. This reversion notably affected both the expression of the PR1 gene after treatment with 250 µM SA (Figure 4C) and the formation of HR at high light (data not shown).…”
Section: Resultsmentioning
confidence: 90%
See 1 more Smart Citation
“…In this double mutant, a clear reversion of the phenotypic reduction of cell elongation in the psi2-DS1 mutant was observed in continuous white light (Figure 4A), as well as in continuous low red light (Figure 4B), a discriminating condition for the involvement of both phyA and phyB in the psi2 phenotype [26]. This reversion notably affected both the expression of the PR1 gene after treatment with 250 µM SA (Figure 4C) and the formation of HR at high light (data not shown).…”
Section: Resultsmentioning
confidence: 90%
“…The psi2 mutant contains wild type levels of these phytochromes and shows an apparently unaltered sensitivity to blue light [26]. We have now isolated and identified the wild type gene corresponding to psi2 and studied how the related protein regulates the levels of phyA and phyB signals.…”
Section: Introductionmentioning
confidence: 99%
“…First is the observation that lesion formation in many of these mutants is light‐dependent (e.g. Johal et al ., 1995; Genoud et al ., 1998; Brodersen et al ., 2002). Secondly, cloning of several of the genes defined by these mutations has identified a number of genes involved in chlorophyll biosynthesis or degradation (e.g.…”
Section: Mechanisms For Light‐dependent Induced Defencesmentioning
confidence: 99%
“…Evidence for this type of regulation has been recently uncovered in Arabidopsis. Genoud et al . (1998) identified an Arabidopsis light signalling mutant, psi2 (phytochrome signalling), which, in addition to effects on light‐dependent expression of photosynthetic genes, displayed light‐dependent development of spontaneous necrotic lesions and increased PR1 gene expression.…”
Section: Mechanisms For Light‐dependent Induced Defencesmentioning
confidence: 99%
“…The oscillatory mechanism of the clock is based on a transcriptional–translational feedback loop composed of three inhibitory steps (Pokhilko et al ., ; Carré & Veflingstad, ). The LATE ELONGATED HYPOCOTYL (LHY) and CIRCADIAN CLOCK ASSOCIATED‐1 (CCA1) transcription factors are expressed in the early morning (Genoud et al ., ; Wang & Tobin, ) and bind to Evening Element (EE) motifs (AAAATATCT) in the promoters of PSEUDO ‐ RESPONSE REGULATOR 9 , 7 and 5 ( PRR9 , ‐ 7 and ‐ 5 ) and of PRR1 , also known as TIMING OF CAB2 EXPRESSION1 ( TOC1 ; Harmer et al ., ; Matsushika et al ., ; Strayer et al ., ; Alabadi et al ., ; Adams et al ., ). As LHY and CCA1 protein levels decline in the afternoon, the PRR proteins are expressed in successive waves and act to repress LHY and CCA1 transcription until the following morning (Nakamichi et al ., ).…”
Section: Introductionmentioning
confidence: 99%