Compound Leaf Development and Evolution in the Legumes Export

@article{citeulike:2193037, abstract = {Across vascular plants, Class 1 KNOTTED1-like (KNOX1) genes appear to play a critical role in the development of compound leaves. An exception to this trend is found in the Fabaceae, where pea (Pisum sativum) uses UNIFOLIATA, an ortholog of the floral regulators FLORICAULA (FLO) and LEAFY (LFY), in place of KNOX1 genes to regulate compound leaf development. To assess the phylogenetic distribution of KNOX1-independent compound leaf development, a survey of KNOX1 protein expression across the Fabaceae was undertaken. The majority of compound-leafed Fabaceae have expression of KNOX1 proteins associated with developing compound leaves. However, in a large subclade of the Fabaceae, the inverted repeatlacking clade (IRLC), of which pea is a member, KNOX1 expression is not associated with compound leaves. These data suggest that the FLO/LFY gene may function in place of KNOX1 genes in generating compound leaves throughout the IRLC. The contribution of FLO/LFY to leaf complexity in a member of the Fabaceae outside of the IRLC was examined by reducing expression of FLO/LFY orthologs in transgenic soybean (Glycine max). Transgenic plants with reduced FLO/LFY expression showed only slight reductions in leaflet number. Overexpression of a KNOX1 gene in alfalfa (Medicago sativa), a member of the IRLC, resulted in an increase in leaflet number. This implies that KNOX1 targets, which promote compound leaf development, are present in alfalfa and are still sensitive to KNOX1 regulation. These data suggest that KNOX1 genes and the FLO/LFY gene may have played partially overlapping roles in compound leaf development in ancestral Fabaceae but that the FLO/LFY gene took over this role in the IRLC. 10.1105/tpc.107.052886}, author = {Champagne, Connie E. and Goliber, Thomas E. and Wojciechowski, Martin F. and Mei, Raymond W. and Townsley, Brad T. and Wang, Kan and Paz, Margie M. and Geeta, R. and Sinha, Neelima R.}, citeulike-article-id = {2193037}, citeulike-linkout-0 = {http://dx.doi.org/10.1105/tpc.107.052886}, citeulike-linkout-1 = {http://www.plantcell.org/cgi/content/abstract/19/11/3369}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/17993625}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=17993625}, day = {1}, doi = {10.1105/tpc.107.052886}, journal = {Plant Cell}, keywords = {fabaceae, knox, leaf-development, lfy}, month = {November}, number = {11}, pages = {3369--3378}, posted-at = {2008-02-03 03:45:37}, priority = {2}, title = {Compound Leaf Development and Evolution in the Legumes}, url = {http://dx.doi.org/10.1105/tpc.107.052886}, volume = {19}, year = {2007} }

TY - JOUR ID - citeulike:2193037 L3 - citeulike-article-id:2193037 N2 - Across vascular plants, Class 1 KNOTTED1-like (KNOX1) genes appear to play a critical role in the development of compound leaves. An exception to this trend is found in the Fabaceae, where pea (Pisum sativum) uses UNIFOLIATA, an ortholog of the floral regulators FLORICAULA (FLO) and LEAFY (LFY), in place of KNOX1 genes to regulate compound leaf development. To assess the phylogenetic distribution of KNOX1-independent compound leaf development, a survey of KNOX1 protein expression across the Fabaceae was undertaken. The majority of compound-leafed Fabaceae have expression of KNOX1 proteins associated with developing compound leaves. However, in a large subclade of the Fabaceae, the inverted repeatlacking clade (IRLC), of which pea is a member, KNOX1 expression is not associated with compound leaves. These data suggest that the FLO/LFY gene may function in place of KNOX1 genes in generating compound leaves throughout the IRLC. The contribution of FLO/LFY to leaf complexity in a member of the Fabaceae outside of the IRLC was examined by reducing expression of FLO/LFY orthologs in transgenic soybean (Glycine max). Transgenic plants with reduced FLO/LFY expression showed only slight reductions in leaflet number. Overexpression of a KNOX1 gene in alfalfa (Medicago sativa), a member of the IRLC, resulted in an increase in leaflet number. This implies that KNOX1 targets, which promote compound leaf development, are present in alfalfa and are still sensitive to KNOX1 regulation. These data suggest that KNOX1 genes and the FLO/LFY gene may have played partially overlapping roles in compound leaf development in ancestral Fabaceae but that the FLO/LFY gene took over this role in the IRLC. 10.1105/tpc.107.052886 IS - 11 JF - Plant Cell EP - 3378 TI - Compound Leaf Development and Evolution in the Legumes VL - 19 SP - 3369 KW - fabaceae KW - knox KW - leaf-development KW - lfy AU - Champagne, Connie AU - Goliber, Thomas AU - Wojciechowski, Martin AU - Mei, Raymond AU - Townsley, Brad AU - Wang, Kan AU - Paz, Margie AU - Geeta, R AU - Sinha, Neelima PY - 2007/11/01/ UR - http://dx.doi.org/10.1105/tpc.107.052886 ER -