Cell cycle control and seed development

Frontiers in Plant Science

Ricardo A. Dante¹  Brian A. Larkins²  Paolo A. Sabelli² 

[1] Embrapa Agricultural Informatics;University of Arizona;University of Nebraska;

关键词: Cell Division;    Cotyledon;    Endosperm;    embryo;    endoreduplication;    seed coat;   

DOI  :  10.3389/fpls.2014.00493

来源: DOAJ

【 摘 要 】

Seed development is a complex process that requires coordinated integration of many genetic, metabolic and physiological pathways and environmental cues. Different cell cycle types, such as asymmetric cell division, acytokinetic mitosis, mitotic cell division and endoreduplication, frequently occur in sequential yet overlapping manner during the development of the embryo and the endosperm, seed structures that are both products of double fertilization. Asymmetric cell divisions in the embryo generate polarized daughter cells with different cell fates. While nuclear and cell division cycles play a key role in determining final seed cell numbers, endoreduplication is often associated with processes such as cell enlargement and accumulation of storage metabolites that underlie cell differentiation and growth of the different seed compartments. This review focuses on recent advances in our understanding of different cell cycle mechanisms operating during seed development and their impact on the growth, development and function of seed tissues. Particularly, the roles of core cell cycle regulators, such as cyclin-dependent-kinases and their inhibitors, the Retinoblastoma-Related/E2F pathway and the proteasome-ubiquitin system, are discussed in the contexts of different cell cycle types that characterize seed development. The contributions of nuclear and cellular proliferative cycles and endoreduplication to cereal endosperm development are discussed.

【 授权许可】

Unknown