Cloning and sequencing of cDNAs encoding two SSS

Yunjun Ai, De Sheng Tsai, Teh hui Kao

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22 Scopus citations


A defective S-allele, S0, and a functional S-allele, Sx, have previously been found to be retained in an F1 hybrid of a self-compatible commercial cultivar of Petunia hybrida. Pistil proteins associated with these two alleles have also been identified. Their amino-terminal sequences have been found to share a high degree of similarity with those of S-proteins characterized from self-incompatible solanaceous species. Here we report the isolation and sequencing of cDNAs encoding S0- and Sx-proteins. Their deduced amino acid sequences contain all the consensus primary structural features of S-proteins from self-incompatible solanaceous species. Both proteins also have ribonuclease activity. The implications of these findings are discussed in relation to the presumed function of the S-protein in the self-incompatibility interaction.

Original languageEnglish (US)
Pages (from-to)523-528
Number of pages6
JournalPlant molecular biology
Issue number3
StatePublished - Jun 1992

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Genetics
  • Plant Science


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