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      https://www.ias.ac.in/article/fulltext/jgen/079/02/0025-0032

    • Keywords

       

      cDNA clones; rice panicles; floral development; rice

    • Abstract

       

      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 toCOP1, a regulator of photomorphogenesis inArabidopsis; sequence-specific 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.

    • Author Affiliations

       

      Kumuda M. Kushalappa1 2 Autar K. Mattoo3 Usha Vijayraghavan1

      1. Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore - 560012, India
      2. Department of Botany, University of British Columbia, Vancouver, BC - V6T124, Canada
      3. USDA Vegetable Lab, Building 010A, ARS/PSI/BARC-West, 10300 Baltimore Avenue, Beltsville, MD - 20705-2350, USA
    • Dates

       
  • Journal of Genetics | News

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