Abstract
The endosperm develops in fertilized ovules of angiosperms following fertilization of the central cell and nuclei in the female gametophyte. Endosperms differ in whether, and which, nuclear divisions are followed by cellular divisions; the variants are classified as cellular, nuclear or helobial. Functional correlates of this variation are little understood. Phylogenetic methods provide a powerful means of exploring taxonomic variation and phylogenetic patterns, to frame questions regarding biological processes. Data on endosperms across angiosperms were analysed in a phylogenetic context in order to determine homologies and detect biases in the direction of evolutionary transitions. Analyses confirm that neither all nuclear nor all helobial endosperms are homologous, raise the possibility that cellular development is a reversal in some derived angiosperms (e.g. asterids) and show that a statistically significant bias towards evolution of nuclear endosperms (and against reversals) prevails in angiosperms as a whole. This bias suggests strong selective advantages to having nuclear endosperm, developmental constraints to reversals or both. Homologies suggest that the microtubular cycle and cellularization pattern characteristic of reproductive cells across land plants may have been independently co-opted during multiple origins of nuclear endosperms, but information on cellular endosperms is essential to investigate further.
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Selected References
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- Balasubramanian S., Schneitz K. NOZZLE regulates proximal-distal pattern formation, cell proliferation and early sporogenesis during ovule development in Arabidopsis thaliana. Development. 2000 Oct;127(19):4227–4238. doi: 10.1242/dev.127.19.4227. [DOI] [PubMed] [Google Scholar]
- Berger F. Endosperm development. Curr Opin Plant Biol. 1999 Feb;2(1):28–32. doi: 10.1016/s1369-5266(99)80006-5. [DOI] [PubMed] [Google Scholar]
- Brown R. C., Lemmon B. E. The cytoskeleton and spatial control of cytokinesis in the plant life cycle. Protoplasma. 2001;215(1-4):35–49. doi: 10.1007/BF01280302. [DOI] [PubMed] [Google Scholar]
- Chaudhury A. M., Koltunow A., Payne T., Luo M., Tucker M. R., Dennis E. S., Peacock W. J. Control of early seed development. Annu Rev Cell Dev Biol. 2001;17:677–699. doi: 10.1146/annurev.cellbio.17.1.677. [DOI] [PubMed] [Google Scholar]
- Friedman W. E. Organismal duplication, inclusive fitness theory, and altruism: understanding the evolution of endosperm and the angiosperm reproductive syndrome. Proc Natl Acad Sci U S A. 1995 Apr 25;92(9):3913–3917. doi: 10.1073/pnas.92.9.3913. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Olsen Odd-Arne. ENDOSPERM DEVELOPMENT: Cellularization and Cell Fate Specification. Annu Rev Plant Physiol Plant Mol Biol. 2001 Jun;52(NaN):233–267. doi: 10.1146/annurev.arplant.52.1.233. [DOI] [PubMed] [Google Scholar]
- Qiu Y. L., Lee J., Bernasconi-Quadroni F., Soltis D. E., Soltis P. S., Zanis M., Zimmer E. A., Chen Z., Savolainen V., Chase M. W. The earliest angiosperms: evidence from mitochondrial, plastid and nuclear genomes. Nature. 1999 Nov 25;402(6760):404–407. doi: 10.1038/46536. [DOI] [PubMed] [Google Scholar]
- Williams Joseph H., Friedman William E. Identification of diploid endosperm in an early angiosperm lineage. Nature. 2002 Jan 31;415(6871):522–526. doi: 10.1038/415522a. [DOI] [PubMed] [Google Scholar]
- van Hengel AJ, Guzzo F, van Kammen A, de Vries SC Expression pattern of the carrot EP3 endochitinase genes in suspension cultures and in developing seeds . Plant Physiol. 1998 May;117(1):43–53. doi: 10.1104/pp.117.1.43. [DOI] [PMC free article] [PubMed] [Google Scholar]
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