Related Experiment Video
Updated: Jun 25, 2026
08:09
Annotation of Plant Gene Function via Combined Genomics, Metabolomics and Informatics
Published on: June 17, 2012
Comparative genomic analysis of light-regulated transcripts in the Solanaceae
Mariana Rutitzky1, Hernan O Ghiglione, José A Curá
1IFEVA, Facultad de Agronomía, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina. rutitzky@agro.uba.ar
BMC Genomics
|February 5, 2009
Summary
Plants use light signals for growth adjustments, involving major transcriptome changes. This study in Solanaceae species reveals conserved and unique gene expression patterns in response to light, aiding seasonal acclimatization.
Area of Science:
- Plant Biology
- Molecular Biology
- Genetics
Background:
- Plants utilize light signals for environmental adaptation, influencing growth and development.
- Transcriptome analysis in model plants like Arabidopsis and rice shows significant gene expression changes in response to light.
- This study investigates light-mediated transcriptional responses in Solanaceae species to identify conserved and species-specific gene expression patterns.
Purpose of the Study:
- To compare transcriptional responses to light across different Solanaceae species.
- To identify common and distinct gene expression changes in response to photoperiod and light quality.
- To explore the evolutionary basis of plant adaptation to seasonal light variations.
Main Methods:
- Utilized cDNA microarrays to analyze gene expression in potato and tobacco under different photoperiods (long days vs. short days).
- Investigated the role of phytochrome B (phyB) in regulating photoperiodic responses in potato.
- Compared photoperiodic responses in two Nicotiana species with contrasting flowering times (Nicotiana tabacum Maryland Mammoth and Nicotiana sylvestris).
- Examined gene expression changes in response to red versus far-red light treatments in tomato to study germination regulation.
Main Results:
- Identified genes associated with photosynthesis, pigment synthesis, and redox homeostasis that are upregulated under long days, likely aiding acclimatization to seasonal irradiance.
- Found both shared and distinct photoperiodically regulated genes between potato and tobacco, suggesting conserved and convergent evolutionary mechanisms.
- A beta-ZIP transcription factor showed correlated expression with floral transition in Nicotiana species and was regulated by photoperiod and phyB in potato, indicating its potential role as a general photoperiod regulator.
- The GIGANTEA gene, known for controlling flowering time, was responsive to photoperiod in potato and tobacco leaves and light quality in tomato seeds, suggesting a conserved light signaling pathway.
Conclusions:
- Transcriptional responses to light in Solanaceae species involve conserved and convergent evolutionary processes for physiological adaptation to seasonal changes.
- A beta-ZIP transcription factor is a candidate for a general regulator of photoperiodic responses across species.
- The GIGANTEA gene's regulation by photoperiod and light quality across different developmental contexts and species highlights a conserved light signaling cascade.
Related Concept Videos
01:17Gene Regulation During Sporulation
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
02:16Light Acquisition
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
01:25Cell Signaling in Plants
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...