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Meristems: start your signaling.
1Department of Biology, University of Michigan, Ann Arbor 48109-1048, USA. clarks@umich.edu
Current Opinion in Plant Biology
|February 13, 2001
Summary
Shoot apex development relies on stem cells, not cell lineage, for pattern formation. Cell signaling pathways regulate shoot meristem growth and organ development, involving receptor-mediated signaling and plasmodesmata.
Area of Science:
- Plant biology
- Developmental biology
- Cell biology
Background:
- The shoot apex, crucial for plant growth, originates from stem cells.
- Cell lineage is not a determinant of pattern formation or cell fate in the shoot apex.
- Cell signaling pathways are increasingly recognized for their role in regulating shoot meristem development.
Purpose of the Study:
- To summarize the current understanding of pattern formation and cell fate determination at the shoot apex.
- To highlight the role of cell signaling in shoot meristem development and organogenesis.
Main Methods:
- Review of existing scientific literature on shoot apex development.
- Analysis of evidence implicating cell signaling pathways.
Main Results:
- Cell lineage does not establish pattern formation or cell fate at the shoot apex.
- Multiple cell signaling pathways are involved in regulating shoot meristem development.
- Key pathways include receptor-mediated signaling and intercellular communication via plasmodesmata.
Conclusions:
- Shoot apex development is primarily regulated by stem cell activity and cell signaling.
- Understanding these signaling pathways is critical for comprehending plant organ formation and growth.