期刊
ELIFE
卷 8, 期 -, 页码 -出版社
eLIFE SCIENCES PUBL LTD
DOI: 10.7554/eLife.43101
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- Centre National de la Recherche Scientifique
- Agence Nationale de la Recherche [ANR-10-BLAN-1727, ANR-10-BTBR-04-01, ANR-10-LABX-40]
- Interreg Program France (Channel)-England
- University Pierre and Marie Curie
- European Research Council [638240]
- European Commission European Erasmus Mundus program
- China Scholarship Council
- European Research Council ERC-SEXYPARTH
- Agence Nationale de la Recherche (ANR) [ANR-10-BLAN-1727] Funding Source: Agence Nationale de la Recherche (ANR)
Three amino acid loop extension homeodomain transcription factors (TALE HD TFs) act as life cycle regulators in green algae and land plants. In mosses these regulators are required for the deployment of the sporophyte developmental program. We demonstrate that mutations in either of two TALE HD TF genes, OUROBOROS or SAMSARA, in the brown alga Ectocarpus result in conversion of the sporophyte generation into a gametophyte. The OUROBOROS and SAMSARA proteins heterodimerise in a similar manner to TALE HD TF life cycle regulators in the green lineage. These observations demonstrate that TALE-HD-TF-based life cycle regulation systems have an extremely ancient origin, and that these systems have been independently recruited to regulate sporophyte developmental programs in at least two different complex multicellular eukaryotic supergroups, Archaeplastida and Chromalveolata.
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