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Related Experiment Videos

Integrin-like proteins in the pollen tube: detection, localization and function.

Y Sun1, H Qian, X D Xu

  • 1Institute of Molecular Cell Biology, Hebei Normal University, Shijiazhuang, People s Republic of China.

Plant & Cell Physiology
|January 10, 2001
PubMed
Summary

Integrin-like proteins are present in pollen tubes, potentially aiding growth and style interaction. These proteins, mainly alpha(v) and beta3 subunits, are found near the pollen tube tip and plasma membrane.

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Area of Science:

  • Plant reproductive biology
  • Cellular and molecular biology

Background:

  • Integrins are crucial cell adhesion receptors in animals.
  • Pollen tube growth is essential for plant fertilization.

Purpose of the Study:

  • To investigate the presence and distribution of integrin-like proteins in pollen tubes.
  • To determine the potential role of these proteins in pollen tube growth and function.

Main Methods:

  • Immunofluorescent labeling and confocal microscopy to visualize protein localization.
  • Western blotting to detect protein presence and subunits.
  • Functional assays using antibodies and peptides to assess growth inhibition.

Main Results:

  • Intense immunostaining of integrin-like proteins observed near the tip and plasma membrane of pollen tubes in Lilium davidii and Nicotiana tabacum.

Related Experiment Videos

  • Western blotting confirmed the presence of alpha(v), beta3, and vitronectin receptor (VnR)-like proteins in pollen tube plasma membranes.
  • While in vitro growth was unaffected, antibody and peptide treatments inhibited pollen tube growth under quasi in vivo conditions.

    • Conclusions:

    • Integrin-like proteins are present in pollen tubes, with alpha(v) and beta3 subunits being prominent in lily pollen.
    • These proteins appear to play a role in pollen tube tip growth and interaction with the style's extracellular matrix.