LEAFY COTYLEDON1 expression in the endosperm enables embryo maturation in Arabidopsis

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DOI	Resolve DOI: https://doi.org/10.1038/s41467-021-24234-1
Author	Search for: Song, Jingpu¹ORCID identifier: https://orcid.org/0000-0003-0874-9078; Search for: Xie, Xin ORCID identifier: https://orcid.org/0000-0002-4614-9818; Search for: Chen, Chen ORCID identifier: https://orcid.org/0000-0001-6196-3255; Search for: Shu, Jie; Search for: Thapa, Raj K.ORCID identifier: https://orcid.org/0000-0002-7439-6760; Search for: Nguyen, Vi; Search for: Bian, Shaomin ORCID identifier: https://orcid.org/0000-0002-7060-2184; Search for: Kohalmi, Susanne E.ORCID identifier: https://orcid.org/0000-0002-5852-2771; Search for: Marsolais, Frédéric ORCID identifier: https://orcid.org/0000-0003-3914-141X; Search for: Zou, Jitao¹ORCID identifier: https://orcid.org/0000-0002-1287-6160; Search for: Cui, Yuhai ORCID identifier: https://orcid.org/0000-0002-3675-3288
Affiliation	National Research Council of Canada. Aquatic and Crop Resource Development
Format	Text, Article
Abstract	The endosperm provides nutrients and growth regulators to the embryo during seed development. LEAFY COTYLEDON1 (LEC1) has long been known to be essential for embryo maturation. LEC1 is expressed in both the embryo and the endosperm; however, the functional relevance of the endosperm-expressed LEC1 for seed development is unclear. Here, we provide genetic and transgenic evidence demonstrating that endosperm-expressed LEC1 is necessary and sufficient for embryo maturation. We show that endosperm-synthesized LEC1 is capable of orchestrating full seed maturation in the absence of embryo-expressed LEC1. Inversely, without LEC1 expression in the endosperm, embryo development arrests even in the presence of functional LEC1 alleles in the embryo. We further reveal that LEC1 expression in the endosperm begins at the zygote stage and the LEC1 protein is then trafficked to the embryo to activate processes of seed maturation. Our findings thus establish a key role for endosperm in regulating embryo development.
Publication date	2021-06-25
Publisher	Nature Research
Licence	Creative Commons, Attribution 4.0 Generic (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
In	Nature Communications 12, no. 1, 3963 (25 June 2021).
Language	English
Peer reviewed	Yes
NRC number	NRC-ACRD-PDFB084
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Record identifier	a9b18157-e7e0-43d0-bd4d-17825696248c
Record created	2021-08-23
Record modified	2021-08-23

Date modified:: 2024-04-20