Abstract
Seed development is a complex process and consists of two phases: embryo morphogenesis and seed maturation. LEAFY COTYLEDON (LEC) transcription factors, first discovered in Arabidopsis thaliana several decades ago, are master regulators of seed development. Here, we first summarize molecular genetic mechanisms underlying the control of embryogenesis and seed maturation by LECs and then provide a brief review of recent findings in the role of LECs in embryonic resetting of the parental ‘memory of winter cold’ in Arabidopsis. In addition, we discuss various chromatin-based mechanisms underlying developmental silencing of LEC genes throughout the post-embryonic development to terminate the embryonic developmental program.
Highlights
Plant seeds are composed mainly of three distinct compartments: embryo, endosperm, and seed coat
Each stage of seed development is regulated by a number of transcription factors (TFs), among which are LEAFY COTYLEDON (LEC)[1], LEC2, and FUSCA3 (FUS3)[2]
Loss-of-function mutations in LEC1, LEC2, or FUS3 lead to a partial loss of embryo identity and give rise to a homeotic ‘leafy cotyledon’ phenotype: embryos with cotyledons characteristic of leaf traits[1,2]
Summary
F1000 Faculty Reviews are written by members of the prestigious F1000 Faculty. They are commissioned and are peer reviewed before publication to ensure that the final, published version is comprehensive and accessible. The reviewers who approved the final version are listed with their names and affiliations. Any comments on the article can be found at the end of the article
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