Abstract
Agave tequilana Weber is a monocot plant species member of the Asparagaceae family. One of the characteristics of monocot species is that their embryos show only one cotyledon. In this work, the occurrence of embryos with two cotyledons and fused cotyledons in A. tequilana is reported for the first time. The occurrence of dicotyledonar embryos in a species that by definition should have only one cotyledon could bring an opportunity to elucidate the mechanisms that have given the origin to the only one cotyledon present in monocots. Syncotyly is considered in this work as the possible mechanism that gave rise to the only cotyledon mostly present in this species.
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References
Bancroft, N.: A review of literature concerning the evolution of monocotyledons. — New Phytol. 13: 285–308, 1914.
Chandler, J.W.: Cotyledon organogenesis. — J. exp. Bot. 59: 2917–2931, 2008.
Chase, M.W.: Monocot relationships: an overview. — Amer. J. Bot. 91: 1645–1655, 2004.
Davies, T.J., Barraclough, T.G., Chase, M.W., Soltis, P.S., Soltis, D. E., Savolainen, V.: Darwin’s abominable mystery: insights from a supertree of the angiosperms. — Proc. nat. Acad. Sci. USA 101: 1904–1909, 2004.
Feng, J.H., Xu, B.X., Dong, L.X., Zhang, C.L., Liang, X.L., Wu, W.C.: Embryogenesis, germination, structure and cotyledon dimorphism of Zea mays embryo. — Acta bot. sin. 45: 712–723, 2003.
Haines, R.W., Lye, K.A.: Monocotylar seedlings: a review of evidence supporting an origin by fusion. — Bot. J. Linn. Soc. 78: 123–140, 1979.
Kuhl, J.C., Cheung, F., Yuan Q., Martin, M., Zewdie, Y., McCallum, J., Catanach, A., Rutherford, P., Sink, K.C., Jenderek, M., Prince, J.P., Town, C.D., Havey, M.J.: A unique set of 11,008 onion expressed sequence tags reveals expressed sequence and genomic differences between the monocot orders Asparagales and Poales. — Plant Cell 16: 114–125, 2004.
Leyser, O., Day, S.: Mechanisms in Plant Development. — Blackwell, Oxford 2002.
Liu C. M., Xu, Z. H., Chua, N. H.: Auxin polar transport is essential for the establishment of bilateral symmetry during early plant embryogenesis. — Plant Cell 5: 621–630, 1993.
Martin, W., Lydiate, D., Brinkmann, H., Forkmann, G., Saedler, H., Rüdiger, C.: Molecular phylogenies in angiosperm evolution. — Mol. Biol. Evol. 10: 140–162, 1993.
Park, S., Harada, J.J.: Plant Embryogenesis. — In: Suárez, M.F., Bozhkov, P.V. (ed): Methods in Molecular Biology. Vol. 427. Pp 3–14. Humana Press, Totowa 2008.
Santacruz-Ruvalcaba, F., Gutiérrez-Mora, A., Rodríguez-Garay, B.: Somatic embryogenesis in some Cactus and Agave species. — J. Prof. Assoc. Cactus Dev. 3: 15–26, 1998.
Sargant, E.: A theory of the origin of monocotyledons founded on the structure of their seedlings. — Ann. Bot. 17: 1–92, 1903.
Soltis, P.S., Soltis, D.E.: The origin and diversification of angiosperms. — Amer. J. Bot. 91: 1614–1626, 2004.
Shuma, J.M., Raju, M.V.S.: Is the wild oat embryo monocotylous?. — Bot. Mag. Tokyo 104: 15–23, 1991.
Titova, G.E.: Agapanthus praecox Willd. (Alliaceae) in monocotyly, dicotyly and transitional forms. — Acta biol. cracov. Bot. 45: 161–165, 2003.
Vicentz, M., Cara, F.A.A., Okura, V.K., Da Silva, F.R., Pedrosa, G.L., Hemerly, A.S., Capella, A.N., Marins, M., Ferreira, P.C., Franca, S.C., Grivet, L., Vettore, A.L., Kemper, E.L., Burnquist, W.L., Targo, M.L.P., Siqueira, W.J., Kuramae, E.E., Marino, C.L., Camargo, L.E.A., Carrer, H., Coutinho, L.L., Furlan, L.R., Lemos, M.V.F., Nunes, L.R., Gomes, S.L., Santelli, R.V., Goldman, M.H., Bacci, M., Giglioti, E.A., Thiemann, O.H., Silva, F.H., Van-Sluys, M.A., Nobrega, F.G., Arruda, P., Menck, F.M.: Evaluation of monocot and eudicot divergence using the sugarcane transcriptome. — Plant Physiol. 134: 951–959, 2004.
Wolfe, K., Gouy, M., Yang, Y.W., Sharp, P.M., Li, W.H.: Date of monocot-dicot divergence estimated from chloroplast DNA sequence data. — Proc. nat. Acad. Sci. USA 86: 6201–6205, 1989.
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Acknowledgements: This work was financially supported by SEP-CONACYT-México Project 24554 (to B.R.G.) and a grant form CONACYT-México given to C. A.-G. for graduate studies. This paper is dedicated to Dr. Juan Manuel Carranza Rosales.
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Ayala-González, C., Gutiérrez-Mora, A. & Rodríguez-Garay, B. The occurrence of dicotyledonar embryos in Agave tequilana . Biol Plant 58, 788–791 (2014). https://doi.org/10.1007/s10535-014-0456-z
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DOI: https://doi.org/10.1007/s10535-014-0456-z