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Related Concept Videos

Diversity in Cell Signaling Responses01:22

Diversity in Cell Signaling Responses

The physiological function of a cell and cellular communication are outcomes of a range of extrinsic signals, intracellular signaling pathways, and cellular responses. No two cell types express the same repertoire of signaling components. Receptors are highly selective for their cognate ligands, but once activated, they can alter multiple cellular processes such as DNA transcription, protein synthesis, and metabolic activity. 
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A High-Resolution, Single-Grain, In Vivo Pollen Hydration Bioassay for Arabidopsis thaliana
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Diverse cell signalling pathways regulate pollen-stigma interactions: the search for consensus.

Simon J Hiscock1, Alexandra M Allen1

  • 1School of Biological Sciences, University of Bristol, Woodland Road, Bristol BS8 1UG, UK.

The New Phytologist
|December 17, 2008
PubMed
Summary
This summary is machine-generated.

Flowering plants use siphonogamy, a pollen tube delivery system, for land reproduction. This review details the crucial pollen-stigma interactions enabling fertilization in angiosperms.

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Area of Science:

  • Plant reproduction
  • Reproductive biology
  • Angiosperm fertilization

Background:

  • Siphonogamy, the use of a pollen tube for sperm delivery, enabled terrestrial sexual reproduction in flowering plants (angiosperms).
  • This process involves intricate pollen-pistil interactions, crucial for successful fertilization.
  • Understanding these early interactions is key to comprehending plant reproductive success.

Purpose of the Study:

  • To review current knowledge on cellular and molecular mechanisms of pollen-stigma interactions.
  • To elucidate the signaling pathways governing the earliest stages of plant fertilization.
  • To consolidate recent advances in understanding pollen germination and pollen tube guidance.

Main Methods:

  • Literature review of recent research on pollen-stigma interactions.
  • Analysis of molecular and cellular signaling pathways involved in fertilization.
  • Synthesis of findings on pollen adhesion, germination, and pollen tube growth.

Main Results:

  • Detailed description of the pollen-stigma interface and its role in regulating fertilization.
  • Identification of key molecular signals exchanged between pollen and pistil.
  • Elucidation of the cellular processes governing pollen tube invasion and growth through the stigma.

Conclusions:

  • Pollen-stigma interactions are a complex, highly regulated process essential for angiosperm reproduction.
  • Significant progress has been made in identifying the molecular players involved in these interactions.
  • Further research promises deeper insights into the mechanisms of plant fertilization and potential applications in agriculture.