Molecular dissection of the pea shoot apical meristem
Publication Year 2009, Volume 60, Issue #14, Page 4201-4213
- Journal Title
- JOURNAL OF EXPERIMENTAL BOTANY
- Publication Type
- Journal Article
- The shoot apical meristem (SAM) is responsible for the development of all the above-ground parts of a plant. Our understanding of the SAM at the molecular level is incomplete. This study investigates the gene expression repertoire of SAMs in the garden pea (Pisum sativum). To this end, 10 346 EST sequences representing 7610 unique genes were generated from SAM cDNA libraries. These sequences, together with previously reported pea ESTs, were used to construct a 12K oligonucleotide array to identify genes with differential SAM expression, as compared to axillary meristems, root apical meristems, or non-meristematic tissues. A number of genes were identified, predominantly expressed in specific cell layers or domains of the SAM and thus are likely components of the gene networks involved in stem cell maintenance or the initiation of lateral organs. Further in situ hybridization analysis confirmed the spatial localization of some of these genes within the SAM. Our data also indicate the diversification of some gene expression patterns and hence functions in legume crop plants. A number of transcripts highly expressed in all three meristems have also been uncovered and these candidates may provide valuable insight into molecular networks that underpin the maintenance of meristematic functionality.
- OXFORD UNIV PRESS
- ARABIDOPSIS ERECTA GENE; MAIZE HOMEOBOX GENE; STEM-CELL NICHE; RECEPTOR KINASE; TRANSCRIPTION FACTOR; FLOWER DEVELOPMENT; PLANT DEVELOPMENT; LEAF DEVELOPMENT; ORGAN GROWTH; EXPRESSION
- Publisher's Version
- Rights Notice
- Refer to copyright notice on published article.
Creation Date: 2009-01-01 12:00:00Last Modified: 0001-01-01 12:00:00