Plant Cell Advance Online Publication
Published on September 5, 2008; 10.1105/tpc.108.060327
Received ,
Accepted ,
RNase-Based Self-Incompatibility: Puzzled by Pollen S
Ed Newbigin 1*, Timothy Paape 1, and Joshua R. Kohn 1
1 School of Botany, University of Melbourne, VIC 3010, Australia; Section of Ecology, Behavior, and Evolution, Division of Biological Sciences, University of California at San Diego, La Jolla, California 92093
* To whom correspondence should be addressed. E-mail: edwardjn{at}unimelb.edu.au.
Many plants have a genetically determined self-incompatibility system in which the rejection of self pollen grains is controlled by alleles of an S locus. A common feature of these S loci is that separate pollen- and style-expressed genes (pollen S and style S, respectively) determine S allele identity. The long-held view has been that pollen S and style S must be a coevolving gene pair in order for allelic recognition to be maintained as new S alleles arise. In at least three plant families, the Solanaceae, Rosaceae, and Plantaginaceae, the style S gene has long been known to encode an extracellular ribonuclease called the S-RNase. Pollen S in these families has more recently been identified and encodes an F-box protein known as either SLF or SFB. In this perspective, we describe the puzzling evolutionary relationship that exists between the SLF/SFB and S-RNase genes and show that in most cases cognate pairs of genes are not coevolving in the expected manner. Because some pollen S genes appear to have arisen much more recently than their style S cognates, we conclude that either some pollen S genes have been falsely identified or that there is a major problem with our understanding of how the S locus evolves.
This article has been cited by other articles:
|
|
|
|
 
M. K. You, H. Y. Shin, Y. J. Kim, S. H. Ok, S. K. Cho, J. U. Jeung, S. D. Yoo, J. K. Kim, and J. S. Shin
Novel Bifunctional Nucleases, OmBBD and AtBBD1, Are Involved in Abscisic Acid-Mediated Callose Deposition in Arabidopsis
Plant Physiology,
February 1, 2010;
152(2):
1015 - 1029.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. J. Wheeler, S. Vatovec, and V. E. Franklin-Tong
The pollen S-determinant in Papaver: comparisons with known plant receptors and protein ligand partners
J. Exp. Bot.,
January 22, 2010;
(2010):
erp383v1 - erp383.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
G. Chen, B. Zhang, Z. Zhao, Z. Sui, H. Zhang, and Y. Xue
'A life or death decision' for pollen tubes in S-RNase-based self-incompatibility
J. Exp. Bot.,
December 30, 2009;
(2009)
erp381v1.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
G. Suzuki
Recent Progress in Plant Reproduction Research: The Story of the Male Gametophyte through to Successful Fertilization
Plant Cell Physiol.,
November 1, 2009;
50(11):
1857 - 1864.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
B. McClure
Darwin's foundation for investigating self-incompatibility and the progress toward a physiological model for S-RNase-based SI
J. Exp. Bot.,
March 1, 2009;
60(4):
1069 - 1081.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
