Current Genetics

, Volume 57, Issue 2, pp 89–102

Developmental and cell type characterization of bundle sheath and mesophyll chloroplast transcript abundance in maize

  • Richard M. Sharpe
  • Aditya Mahajan
  • Elizabeth M. Takacs
  • David B. Stern
  • A. Bruce Cahoon
Research Article

DOI: 10.1007/s00294-010-0329-8

Cite this article as:
Sharpe, R.M., Mahajan, A., Takacs, E.M. et al. Curr Genet (2011) 57: 89. doi:10.1007/s00294-010-0329-8

Abstract

The C4 grass Zea mays separates light and light-independent photosynthetic processes into two leaf cell types: bundle sheath (BS) and mesophyll (M). When mature, BS and M cells have anatomically and biochemically distinct chloroplasts that must cooperate to complete the process of photosynthesis. This report compares changes in transcript abundance between young and mature maize BS and M chloroplasts from specific segments of the leaf developmental gradient. Representative transcripts encoding components of Photosystem I, Photosystem II, Cytochrome b6f, thylakoidal NADH dehydrogenase; and the large subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase as well as nine nuclear-coded transcripts encoding chloroplast proteins were measured using quantitative RT-PCR. In addition, 887 nuclear genes encoding plastid-localized proteins, as well as 64 chloroplast and 34 mitochondrial genes were assayed utilizing a cDNA microarray. In 9 out of the 18 chloroplast-encoded genes and 84 genes from the 985 element microarray revealed greater than twofold transcript abundance differences between developmental stages and/or cell types. Patterns for transcripts associated with operons and gene clusters suggest differing regulatory mechanisms for particular polycistronic stretches. In summary, this report provides evidence that cell type-specific transcript abundance varies more in the young developing chloroplast, and differences plateau or subside as chloroplasts mature.

Keywords

Bundle sheath Mesophyll C4 photosynthesis Chloroplast Plastid 

Supplementary material

294_2010_329_MOESM1_ESM.docx (121 kb)
Supplementary material 1 (DOCX 120 kb)

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Richard M. Sharpe
    • 1
    • 3
  • Aditya Mahajan
    • 1
    • 4
  • Elizabeth M. Takacs
    • 2
    • 5
  • David B. Stern
    • 2
  • A. Bruce Cahoon
    • 1
  1. 1.Department of BiologyMiddle Tennessee State UniversityMurfreesboroUSA
  2. 2.Boyce Thompson Institute for Plant ResearchIthacaUSA
  3. 3.Graduate Program of Molecular Plant Science, School of Biological SciencesWashington State UniversityPullmanUSA
  4. 4.Novus International, Inc.LincolnUSA
  5. 5.Department of Plant BiologyCornell UniversityIthacaUSA

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