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Characterization of a gene transcribed in the L2 and L3 layers of the tobacco shoot apical meristem

✍ Scribed by Alan J. Kelly; D. Ry Meeks-Wagner

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
700 KB
Volume
8
Category
Article
ISSN
0960-7412

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✦ Synopsis

Recent genetic and molecular studies have been initiated to uncover the fundamental cellular processes unique to the shoot apical meristem. Our previous work resulted in the isolation of a cDNA clone derived from tobacco apex RNA, A3, that appeared to be transcriptionally restricted to the shoot apex regardless of developmental stage. Here the DNA sequence and in situ RNA analysis of A3 is presented. The A3 gene potentially encodes a small hydrophilic polypeptide, the sequence of which is unique to current data bases. It has been found that transcripts of the A3 gene are confined to the subepidermal and internal cell layers of the tobacco shoot apical meristem throughout development, become localized to undifferentiated floral organ primordia, and diminish as the developmental potential of the meristematic tissue becomes restricted.

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