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Related Concept Videos

Secondary Active Transport01:55

Secondary Active Transport

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One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme “pump” embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
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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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Phloem and Sugar Transport02:02

Phloem and Sugar Transport

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Like many living organisms, plants have tissues that specialize in specific plant functions. For example, shoots are well adapted to rapid growth, while roots are structured to acquire resources efficiently. However, sugar production is primarily restricted to the photosynthetic cells that reside in the leaves of angiosperm plants. Sugar and other resources are transported from photosynthetic tissues to other specialized tissues by a process called translocation.
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Secondary Active Transport01:32

Secondary Active Transport

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One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme "pump" embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
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Transcellular Transport of Solutes01:23

Transcellular Transport of Solutes

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Transcellular transport of solutes is the movement of substances like monosaccharides and amino acids through polarized cells. This transport mechanism is primarily seen in epithelial and endothelial cells aided by membrane transport proteins such as channels and transporters. The tight junctions between these cells confine the membrane proteins to the two sides of the cell. The epithelial cells have distinct apical and basolateral domains. In contrast, the endothelial cells show the luminal...
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Glucose Transporters01:27

Glucose Transporters

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Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
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Related Experiment Video

Updated: May 5, 2026

Transverse Sectioning of Mature Rice Oryza sativa L. Kernels for Scanning Electron Microscopy Imaging Using Pipette Tips as Immobilization Support
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A silicon transporter in rice.

Jian Feng Ma1, Kazunori Tamai, Naoki Yamaji

  • 1Research Institute for Bioresources, Okayama University, Chuo 2-20-1, Kurashiki 710-0046, Japan. maj@rib.okayama-u.ac.jp

Nature
|March 31, 2006
PubMed
Summary

Researchers identified the Low silicon rice 1 (Lsi1) gene, crucial for silicon uptake in rice plants. This discovery offers a new strategy for developing crops with enhanced resistance to various environmental stresses.

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Genetics

Background:

  • Silicon benefits plant growth and stress resistance.
  • Silicon is vital for sustainable rice production.
  • The molecular mechanism of silicon uptake in plants remained unknown.

Purpose of the Study:

  • To identify the gene responsible for silicon accumulation in rice.
  • To elucidate the molecular mechanism of silicon uptake in plants.

Main Methods:

  • Gene identification and characterization (Lsi1).
  • Gene expression analysis in rice roots.
  • Functional analysis using Xenopus oocytes.

Main Results:

  • The Low silicon rice 1 (Lsi1) gene controls silicon accumulation in rice.
  • Lsi1 is an aquaporin family gene constitutively expressed in rice roots.
  • Lsi1 is localized to the plasma membrane of root cells and facilitates silicon transport.

Conclusions:

  • Lsi1 is a silicon transporter in rice.
  • Understanding Lsi1 provides insights into plant silicon uptake.
  • Modifying Lsi1 offers a strategy for engineering stress-resistant crops.