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Cellular differentiation in the maize leaf is disrupted by bundle sheath defective mutations.
L N Hall1, R Roth, T P Brutnell
1Department of Plant Sciences, University of Oxford, UK.
Symposia of the Society for Experimental Biology
|January 25, 2000
Summary
Researchers identified maize bundle sheath defective (bsd) mutants affecting C4 photosynthesis development. These mutants, bsd1 and bsd2, offer insights into cellular processes regulating photosynthetic cell differentiation in maize leaves.
Area of Science:
- Plant biology
- Molecular genetics
- Photosynthesis research
Background:
- Maize leaves feature parallel veins with distinct bundle sheath (BS) and mesophyll (M) cells.
- Cellular differentiation patterns are crucial for specialized functions like C4 photosynthesis.
Purpose of the Study:
- To identify genes controlling cellular differentiation in maize leaves.
- To investigate mutations disrupting specific cell type differentiation.
Main Methods:
- Isolation and characterization of maize bundle sheath defective (bsd) mutants.
- Detailed analysis of bsd1 and bsd2 mutants and their corresponding genes.
Main Results:
- Mutations specifically disrupt BS cell differentiation, affecting C4 photosynthetic development.
- M cells appear to develop normally in the identified mutants.
- Analysis of Bsd1 and Bsd2 genes provides insights into regulatory processes.
Conclusions:
- The identified bsd mutants are valuable tools for studying maize leaf development.
- Understanding these genes can elucidate mechanisms of photosynthetic cell type differentiation.