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A spectrum of genes expressed during early stages of rice panicle and flower development

Kushalappa, Kumuda M and Mattoo, Autar K and Vijayraghavan, Usha (2000) A spectrum of genes expressed during early stages of rice panicle and flower development. In: Journal of Genetics, 79 (2). pp. 25-32.


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To unravel gene expression patterns during rice inflorescence development, particularly at early stages of panicle and floral organ specification, we have characterized random cloned cDNAs from developmental-stage-specific libraries. CDNA libraries were constructed from rice panicles at the stage of branching and flower primordia specification or from panicles undergoing floral organogenesis. Partial sequence analysis and expression patterns of some of these random cDNA clones from these two rice panicle libraries are presented. Sequence comparisons with known DNA sequences in databases reveal that approximately sixtyeight per cent of these expressed rice genes show varying degrees of similarity to genes in other species with assigned functions. In contrast, thirtytwo per cent represent uncharacterized genes. cDNAs reported here code for potential rice homologues of housekeeping molecules, regulators of gene expression, and signal transduction molecules. They comprise both single-copy and multicopy genes, and genes expressed differentially, both spatially and temporally, during rice plant development. New rice cDNAs requiring specific mention are those with similarity to COP1, a regulator of photomorphogenesis in Arabidopsis; sequence-speciÆc DNA binding plant proteins like AP2-domain-containing factors; genes that specify positional information in shoot meristems like leucine-rich-repeat-containing receptor kinases; regulators of chromatin structure like Polycomb domain protein; and also proteins induced by abiotic stresses.

Item Type: Journal Article
Publication: Journal of Genetics
Publisher: Indian Academy of Sciences
Additional Information: Copyright for this article belongs to Indian Academy of Sciences.
Keywords: cDNA clones;Rice panicles;Floral development;Rice
Department/Centre: Division of Biological Sciences > Microbiology & Cell Biology
Date Deposited: 09 Sep 2004
Last Modified: 19 Sep 2010 04:16
URI: http://eprints.iisc.ac.in/id/eprint/1952

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