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Related Concept Videos

Short-distance Transport of Resources02:12

Short-distance Transport of Resources

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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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Channel Rhodopsins01:11

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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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Protein Transport to the Thylakoids01:22

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Thylakoids are membrane-bound sac-like structures within the chloroplast that serve as sites for photosynthesis. Thylakoid lumen contains many electron transport proteins and is enclosed by a thylakoid membrane rich in the light-harvesting complex. Proteins targeted to the thylakoids are transported as precursors and are sorted by the general TOC/TIC import pathway. Once the precursor reaches the stroma, stromal processing peptidases remove their transit signal and expose thylakoid signal...
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Protein Transport to the Stroma01:24

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Chloroplasts are triple membrane structures with an outer membrane, an inner membrane, and a thylakoid membrane, each containing distinct metabolite transporters, membrane translocons, and enzymes. Appropriate sorting and translocating these proteins to their correct membrane systems is essential for chloroplast function.
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The Apoplast and Symplast01:46

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Plant growth depends on its ability to take up water and dissolved minerals from the soil. The root system of every plant is equipped with the necessary tissues to facilitate the entry of water and solutes. The plant tissues involved in the transport of water and minerals have two major compartments - the apoplast and the symplast. The apoplast includes everything outside the plasma membrane of living cells and consists of cell walls, extracellular spaces, xylem, phloem, and tracheids. The...
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Protein Transport to the Inner Chloroplast Membrane01:18

Protein Transport to the Inner Chloroplast Membrane

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Proteins targeted to the inner chloroplast membrane, or plastid proteins, are transported by two general pathways: the stop-transfer and the re-insertion or post-import pathways. Most plastid proteins carry N-terminal transit sequences and internal import sequences targeting it to the specific chloroplast subcompartment. Proteins targeted by the stop-transfer pathway have internal hydrophobic sequences that inhibit their translocation into the stroma. As a result, these precursors are arrested...
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A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response
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Cellular Auxin Transport in Algae.

Suyun Zhang1, Bert van Duijn2,3

  • 1Plant Biodynamics Laboratory, Biology Institute Leiden, Leiden University, Sylviusweg 72, Leiden 2333, BE, The Netherlands. s.zhang@biology.leidenuniv.nl.

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This summary is machine-generated.

Polar auxin transport (PAT) is crucial for plant development. Recent studies confirm PAT in algae, particularly Chara species, offering insights into auxin

Keywords:
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Area of Science:

  • Plant biology
  • Evolutionary biology
  • Phytohormone research

Background:

  • Auxin is a key phytohormone regulating plant growth and development.
  • Polar auxin transport (PAT) is a well-established mechanism in land plants.
  • Algae, especially Charophyceae, are evolutionarily close to land plants.

Purpose of the Study:

  • To review auxin transport in algae.
  • To compare auxin transport mechanisms between algae and land plants.
  • To suggest future research directions for algal auxin studies.

Main Methods:

  • Literature review of auxin transport in algae and land plants.
  • Analysis of recent findings on polar auxin transport in Chara species.
  • Comparative study of auxin's role across plant phylogeny.

Main Results:

  • Polar auxin transport (PAT) has been recently demonstrated in Chara species.
  • Auxin research in algae is gaining momentum.
  • Algae represent a valuable model for studying auxin evolution.

Conclusions:

  • Algae provide a unique system for understanding the evolution of auxin transport.
  • Further research in algal auxin transport can illuminate fundamental plant biology.
  • Comparative studies will enhance our knowledge of phytohormone function.