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Photoreceptors and Plant Responses to Light

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.

Light as Energy

Light as Energy

The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...

Photoluminescence: Applications

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

Cell Signaling in Plants

Cell 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...

Channel Rhodopsins

Channel Rhodopsins

Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
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Light Acquisition

Light 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.

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Related Experiment Video

Updated: May 10, 2025

Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses

Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses

Published on: August 9, 2019

A green light for phytosensors?

Lianne M S Bouwman¹, Mark H J Sturme¹, Gijs A Kleter¹

¹Wageningen Food Safety Research, Wageningen University and Research, Akkermaalsbos 2, 6708 WB Wageningen, The Netherlands.

Trends in Biotechnology

|April 26, 2025

Summary

Transgenic phytosensor plants detect crop stress early. Proper management, including segregation and risk analysis, is crucial to prevent trade disruption and ensure safety as these plants approach commercialization.

Keywords:

commingling food safety phytosensor segregation transgenic crops

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Last Updated: May 10, 2025

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Published on: June 7, 2024

Area of Science:

Agricultural biotechnology
Plant science
Crop monitoring

Background:

Transgenic phytosensor plants offer rapid detection of crop field stressors.
Commercialization of these advanced crop monitoring tools is imminent.

Purpose of the Study:

To highlight the necessity of risk management strategies for transgenic phytosensor plants.
To address potential trade and safety concerns associated with phytosensor crop integration.

Main Methods:

Review of current agricultural biotechnology practices.
Analysis of potential risks associated with transgenic plant commingling.
Assessment of segregation and risk analysis protocols.

Main Results:

Accidental commingling of phytosensor plants with bulk harvest poses significant trade and safety risks.
Effective risk management is essential for the successful integration of phytosensor technology.

Conclusions:

Proactive risk management, including strict segregation and thorough risk analysis, is imperative for the commercial deployment of phytosensor plants.
Ensuring safe and compliant integration of these sentinel plants into agricultural systems is critical.