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Related Concept Videos

Photoreceptors and Plant Responses to Light02:00

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.
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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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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...
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Biological Clocks and Seasonal Responses

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Short-distance Transport of Resources

Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.

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Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities
05:34

Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities

Published on: February 2, 2018

Light-regulated plant growth and development.

Chitose Kami1, Séverine Lorrain, Patricia Hornitschek

  • 1Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland.

Current Topics in Developmental Biology
|August 14, 2010
PubMed
Summary
This summary is machine-generated.

Plants use photoreceptors to sense light, enabling adaptive responses like germination and flowering. These light sensors work together, sometimes interacting with temperature and pathogens, to control plant development.

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Published on: May 29, 2010

Area of Science:

  • Plant biology
  • Photomorphogenesis
  • Molecular signaling

Background:

  • Plants, being sessile and photo-autotrophic, are heavily influenced by light.
  • Higher plants possess photoreceptors to detect light from UV-B to far-red, crucial for survival and development.

Purpose of the Study:

  • To review the families of photoreceptors in plants.
  • To discuss the functional specialization and adaptive responses mediated by these photoreceptors.
  • To highlight the complex signaling mechanisms and crosstalk between light and other environmental factors.

Main Methods:

  • Genetic studies in Arabidopsis.
  • Photobiological studies in Arabidopsis.
  • Review of existing literature on plant photoreceptors and photomorphogenesis.

Main Results:

  • Identified phytochromes (sensing red/far-red light) and UV-A/blue light receptors (cryptochromes, phototropins, Zeitlupe family).
  • Demonstrated functional specialization within photoreceptor families for various light intensities.
  • Showcased numerous adaptive responses and developmental transitions mediated by photoreceptors, including phototropism, shade avoidance, germination, and flowering.
  • Highlighted coordinated responses involving multiple photoreceptors and crosstalk with temperature and pathogens.

Conclusions:

  • Plant photoreceptors are essential for sensing and responding to light environments.
  • Specialization and cooperation among photoreceptors, alongside crosstalk with other factors, enable complex adaptive strategies.
  • Understanding these light-sensing mechanisms is key to comprehending plant development and environmental responses.