Journal
PLOS ONE
Volume 8, Issue 6, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0067971
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Funding
- Department of Energy [DE-FG02-03ER15392]
- National Science Foundation [IOS-1027494]
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1027494] Funding Source: National Science Foundation
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LEAFY COTYLEDON1 (LEC1) is a central regulator of seed development that plays a key role in controlling the maturation phase during which storage macromolecules accumulate and the embryo becomes tolerant of desiccation. We queried the genomes of seedless plants and identified a LEC1 homolog in the lycophyte, Selaginella moellendorffii, but not in the bryophyte, Physcomitrella patens. Genetic suppression experiments indicated that Selaginella LEC1 is the functional ortholog of Arabidopsis LEC1. Together, these results suggest that LEC1 originated at least 30 million years before the first seed plants appeared in the fossil record. The accumulation of Selaginella LEC1 RNA primarily in sexual and asexual reproductive structures suggests its involvement in cellular processes similar to those that occur during the maturation phase of seed development.
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