Description

Plantaginaceae, the plantain family, is a large, diverse family of flowering plants in the order Lamiales that includes common flowers such as snapdragon and foxglove. It is unrelated to the banana-like fruit also called "plantain." In older classifications, Plantaginaceae was the only family of the order Plantaginales, but numerous phylogenetic studies, summarized by the Angiosperm Phylogeny Group, have demonstrated that this taxon should be included within Lamiales.

SI type

The system with the broadest taxonomic distribution, which we term type-1 SI, is gametophytic and based on linked pistil S S-RNase and pollen S S-locus F-box (SLF)/S-haplotype-specific F-box (SFB). So far, type-1 SI has been found in four eudicot families: Solanaceae, Plantaginaceae, Rosaceae, and Rutaceae. After pollination, both S₁- and S₂-RNases can enter pollen tubes and be recognized by S₁- or S₃-SLFs, but only SCF^S₃-SLF complexes can ubiquitinate these S-RNases leading to their degradation by 26S proteasome, with the survived S₁-RNase in S₁ pollen tubes forming the S-RNase condensates (SRCs) resulting in self-pollen inhibition.

SI genes

Downloads

• fasta
• gff
• cds
• pro

Publication

Xue Y, Carpenter R, Dickinson HG, Coen ES. Origin of allelic diversity in antirrhinum S locus RNases. Plant Cell. 1996 May;8(5):805-14. doi: 10.1105/tpc.8.5.805.

Lai Z, Ma W, Han B, Liang L, Zhang Y, Hong G, Xue Y. An F-box gene linked to the self-incompatibility (S) locus of Antirrhinum is expressed specifically in pollen and tapetum. Plant Mol Biol. 2002 Sep;50(1):29-42. doi: 10.1023/a:1016050018779.

Qiao H, Wang F, Zhao L, Zhou J, Lai Z, Zhang Y, Robbins TP, Xue Y. The F-box protein AhSLF-S2 controls the pollen function of S-RNase-based self-incompatibility. Plant Cell. 2004 Sep;16(9):2307-22. doi: 10.1105/tpc.104.024919.

Qiao H, Wang H, Zhao L, Zhou J, Huang J, Zhang Y, Xue Y. The F-box protein AhSLF-S2 physically interacts with S-RNases that may be inhibited by the ubiquitin/26S proteasome pathway of protein degradation during compatible pollination in Antirrhinum. Plant Cell. 2004 Mar;16(3):582-95. doi: 10.1105/tpc.017673.

Zhao L, Huang J, Zhao Z, Li Q, Sims TL, Xue Y. The Skp1-like protein SSK1 is required for cross-pollen compatibility in S-RNase-based self-incompatibility. Plant J. 2010 Apr 1;62(1):52-63. doi: 10.1111/j.1365-313X.2010.04123.x.

Kubo K, Entani T, Takara A, Wang N, Fields AM, Hua Z, Toyoda M, Kawashima S, Ando T, Isogai A, Kao TH, Takayama S. Collaborative non-self recognition system in S-RNase-based self-incompatibility. Science. 2010 Nov 5;330(6005):796-9. doi: 10.1126/science.1195243.

de Nettancourt D (2001) Incompatibility and Incongruity in Wild and Cultivated Plants. Springer, Berlin Heidelberg, Germany. https://link.springer.com/book/10.1007/978-3-662-04502-2https://link.springer.com/book/10.1007/978-3-662-04502-2

Takayama S, Isogai A. Self-incompatibility in plants. Annu Rev Plant Biol. 2005;56:467-89. doi: 10.1146/annurev.arplant.56.032604.144249.

Zhang Y, Zhao Z, Xue Y. Roles of proteolysis in plant self-incompatibility. Annu Rev Plant Biol. 2009;60:21-42. doi: 10.1146/annurev.arplant.043008.092108.

Iwano M, Takayama S. Self/non-self discrimination in angiosperm self-incompatibility. Curr Opin Plant Biol. 2012 Feb;15(1):78-83. doi: 10.1016/j.pbi.2011.09.003.

Fujii S, Kubo K, Takayama S. Non-self- and self-recognition models in plant self-incompatibility. Nat Plants. 2016 Sep 6;2(9):16130. doi: 10.1038/nplants.2016.130.

Zhao H, Zhang Y, Zhang H, Song Y, Zhao F, Zhang Y, Zhu S, Zhang H, Zhou Z, Guo H, Li M, Li J, Gao Q, Han Q, Huang H, Copsey L, Li Q, Chen H, Coen E, Zhang Y, Xue Y. Origin, loss, and regain of self-incompatibility in angiosperms. Plant Cell. 2022 Jan 20;34(1):579-596. doi: 10.1093/plcell/koab266.