Light Signal Transduction in Plants

Staub, Jeffrey M.; Deng, Xing‐Wang

doi:10.1111/j.1751-1097.1996.tb01853.x

Cited by 16 publications

(9 citation statements)

References 119 publications

(91 reference statements)

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“…If seedlings are grown in the light, they follow photomorphogenic (deetiolated) development. In contrast to etiolated seedlings, light-grown seedlings have short hypocotyls, no apical hooks, open and expanded cotyledons containing photosynthetically competent chloroplasts, and high levels of expression of nuclear photosynthesis genes (Staub and Deng, 1996).…”

Section: Introductionmentioning

confidence: 99%

Plastid Translation Is Required for the Expression of Nuclear Photosynthesis Genes in the Dark and in Roots of the Pea lip1 Mutant

1999

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The expression of nuclear photosynthesis genes in pea seedlings requires both light and a postulated signal produced by developing plastids. The requirement for the plastid signal for the accumulation of transcripts of Lhcb1, RbcS, PetE, and AtpC genes was investigated in the pea mutant lip1, which shows light-independent photomorphogenic development. Lincomycin and erythromycin, inhibitors of plastid translation, decreased the accumulation of transcripts of nuclear photosynthesis genes in shoots of light-grown wild-type and lip1 seedlings, indicating that the plastid signal is required in the lip1 mutant. Treatment with lincomycin or erythromycin also reduced the accumulation of transcripts in shoots of dark-grown lip1 seedlings, indicating that light is not an obligate requirement for the synthesis or activity of the plastid signal. Lincomycin had a similar effect on the accumulation of Lhcb1 transcripts in dark-grown cop1-4 seedlings of Arabidopsis. Accumulation of transcripts of nuclear photosynthesis genes was also observed in roots of light-grown lip1 seedlings, and this accumulation, which was associated with the development of chloroplasts, was again dependent on plastid translation. The plastid signal therefore regulates the expression of nuclear photosynthesis genes in the dark and in roots of the lip1 mutant.

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Section: Introductionmentioning

confidence: 99%

Plastid Translation Is Required for the Expression of Nuclear Photosynthesis Genes in the Dark and in Roots of the Pea lip1 Mutant

1999

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“…The cry1 mutation causes cotyledons on intact plants not to grow in blue light, although, as discussed above, this could be primarily a mutational effect on hypocotyl elongation. The det and cop mutations cause seedlings to de‐etiolate in darkness, and affect leaf development in light‐grown plants ( Staub & Deng 1996), but again, these mutations are acting on plant development in general, and are not specific to leaf expansion.…”

Section: Introductionmentioning

confidence: 99%

Leaf expansion – an integrating plant behaviour

Volkenburgh

1999

Plant Cell & Environment

197

126

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Leaves expand to intercept light for photosynthesis, to take up carbon dioxide, and to transpire water for cooling and circulation. The extent to which they expand is determined partly by genetic constraints, and partly by environmental conditions signalling the plant to expand more or less leaf surface area. Leaves have evolved sophisticated sensory mechanisms for detecting these cues and responding with their own growth and function as well as influencing a variety of whole‐plant behaviours. Leaf expansion itself is an integrating behaviour that ultimately determines canopy development and function, allocation of materials determining relative shoot : root volume, and the onset of reproduction. To understand leaf development, and in particular, how leaf expansion is regulated, we must know at the molecular level which biochemical processes accomplish cell growth. Physiological experimentation focusing on ion fluxes across the plasmamembrane is providing new molecular information on how light stimulates cell expansion in some dicotyledonous species. Genetic analyses in Arabidopsis, corn, and other species are rapidly generating a list of mutations and enzyme activities associated with leaf development and expansion. Combination of these approaches, using informed physiological interpretations of phenotypic variation will allow us in the future to identify genes encoding both the processes causing cell expansion, and the regulators of these events.

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“…Like cop/det/fus mutants (see below), darkgrown shy seedlings undergo most of the developmental processes of light-grown wild-type seedlings [134,135]. Mutant screens performed in darkness led to the identification of cop (constitutive photomorphogenesis) and det (deetiolated phenotype) mutants with phenotypes similar to that of light-grown seedlings (for review see [14,18,21,118,129]). The COP/DET loci are identical to previously identified FUS (fusca) loci.…”

Section: Genetic Approachmentioning

confidence: 97%

“…The COP9 complex is nuclearlocalized, but in contrast to COP1, light has no effect on its localization [144,145]. It has been hypothesized that the COP9 complex is directly involved in the nuclear localization of COP1, although COP1 is not part of the COP9 complex [129]. Another repressor of photomorphogenesis which has been cloned is DET1 [146].…”

Section: Genetic Approachmentioning

confidence: 98%

“…Indeed, the HY5 gene was cloned and encodes a bZIP transcription factor [126] which binds to the light-responsive element of the CHS gene leading to transcriptional activation [127]. HY5 interacts directly with another protein, COP1 [127][128][129], previously identified as a repressor of photomorphogenesis (see below). Screening for mutants having a dark-grown phenotype in the light has the advantage that the screens can be done with different light regimes allowing the isolation of mutants affected specifically in the signal transduction pathway of one photoreceptor.…”

Section: Genetic Approachmentioning

confidence: 98%

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Light perception in higher plants

Batschauer

1999

CMLS, Cell. Mol. Life Sci.

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Photosynthetic plants depend on sunlight as their energy source. Thus, they need to detect the intensity, quality and direction of this critical environmental factor and to respond properly by optimizing their growth and development. Perception of light is accomplished by several photoreceptors including phytochromes, blue/ultraviolet (UV)-A and UV-B light photoreceptors. In recent years, genetic, molecular genetic and cell biological approaches have significantly increased our knowledge about the structure and function of the photoreceptors, and allowed the identification of several light signal transduction components. Furthermore, this research led to fruitful interaction between different disciplines, such as molecular biology and ecology. It is safe to assume that we can expect more milestones in this research field in the upcoming years.

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Light Signal Transduction in Plants

Cited by 16 publications

References 119 publications

Plastid Translation Is Required for the Expression of Nuclear Photosynthesis Genes in the Dark and in Roots of the Pea lip1 Mutant

Plastid Translation Is Required for the Expression of Nuclear Photosynthesis Genes in the Dark and in Roots of the Pea lip1 Mutant

Leaf expansion – an integrating plant behaviour

Light perception in higher plants

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