NDLI: Structural and Transcriptional Analysis of the Self-Incompatibility Locus of Almond

Content Provider	PubMed Central
Author	Ushijima, Koichiro Sassa, Hidenori Dandekar, Abhaya M. Gradziel, Thomas M. Tao, Ryutaro Hirano, Hisashi
Copyright Year	2003
Abstract	Gametophytic self-incompatibility in Rosaceae, Solanaceae, and Scrophulariaceae is controlled by the S locus, which consists of an S-RNase gene and an unidentified “pollen S” gene. An ∼70-kb segment of the S locus of the rosaceous species almond, the S haplotype–specific region containing the S-RNase gene, was sequenced completely. This region was found to contain two pollen-expressed F-box genes that are likely candidates for pollen S genes. One of them, named SFB (S haplotype–specific F-box protein), was expressed specifically in pollen and showed a high level of S haplotype–specific sequence polymorphism, comparable to that of the S-RNases. The other is unlikely to determine the S specificity of pollen because it showed little allelic sequence polymorphism and was expressed also in pistil. Three other S haplotypes were cloned, and the pollen-expressed genes were physically mapped. In all four cases, SFBs were linked physically to the S-RNase genes and were located at the S haplotype–specific region, where recombination is believed to be suppressed, suggesting that the two genes are inherited as a unit. These features are consistent with the hypothesis that SFB is the pollen S gene. This hypothesis predicts the involvement of the ubiquitin/26S proteasome proteolytic pathway in the RNase-based gametophytic self-incompatibility system.
Related Links	http://dx.doi.org/10.1105/tpc.009290
Ending Page	781
Page Count	11
Starting Page	771
File Format	PDF
ISSN	10404651
e-ISSN	1532298X
Journal	The Plant Cell
Issue Number	3
Volume Number	15
Language	English
Publisher	American Society of Plant Biologists
Publisher Date	2003-03-01
Access Restriction	Open
Rights Holder	American Society of Plant Biologists
Subject Keyword	Plant Science Cell Biology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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