ibclogo XVI International Botanical Congess

Abstract Number: 2678
Poster No. = 2179


HEAT-SHOCK PROTEIN 90 & CYCLOPHILIN MAY BE INVOLVED IN SEXUAL DIFFERENTIATION OF A RED ALGA, GRIFFITHSIA JAPONICA


Y.K. Lee, C.B. Hong, G.H. Kim*, & I.K. Lee. Dept of Biology, Seoul Nat. Univ. Seoul 151-742, Korea, *Dept of Biology, Kongju Nat. Univ. Chungnam 314-702, Korea.


Hsp90 & cyp are highly conserved proteins which perform diverse functions in some signal transduction pathways. Two sex-related cDNA clones were isolated by a differential screening in a red alga, G. japonica. The transcript corresponding to the first clone GjFP-1(G. japonica Female Predominant-1) was abundant in female, but not in male. Reversely, the second clone GjFW-2(G. japonica Female Weak-2) was highly expressed in male, but not in female. The nucleotide sequences of GjFP-1 and GjFW-2 shared high homology with hsp90 & cyp, respectively. RNA, genomic DNA & in situ hybridization analyses suggest that hsp90 & cyp function linked to the sexual differentiation of G. japonica.

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