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FLAs are present across all embryophytes, and despite their low overall sequence similarity, conserved regions that define the fasciclin functional domain (FAS) have been identified, suggesting that the cell adhesion property is also conserved. FLAs in Arabidopsis have been organized into four subgroups according to the number and distribution of functional domains. Recent studies associated FLAs with cell wall-related processes where domain organization seemed to be related to functional roles. In Arabidopsis, FLAs containing a single FAS domain were found to be important for the integrity and elasticity of the plant cell wall matrix, and FLAs with two FAS domains and two AGP domains were found to be involved in maintaining proper cell expansion under salt stress conditions. The main purpose of the present work was to elucidate the expression pattern of selected FLA genes during embryo and seed development using RT-qPCR. AtFLA8 and AtFLA10, two Arabidopsis genes that stood out in previous microarray studies of embryo development, were further examined using promoter-driven gene reporter analyses. We also studied the expression of cork oak FLA genes and found that their expression partially parallels the expression patterns of the putative AtFLA orthologs. We propose that the functional organization of FLAs is conserved and may be related to fundamental aspects of embryogenesis and seed development across angiosperms. Phylogenetic studies were performed, and we show that the same basic four-subgroup organization described for Arabidopsis FLA gene classification is valid for most Arabidopsis FLA orthologs of several plant species, namely poplar, corn and cork oak.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00497-019-00376-7","type":"journal-article","created":{"date-parts":[[2019,9,9]],"date-time":"2019-09-09T16:03:36Z","timestamp":1568045016000},"page":"353-370","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":32,"title":["In silico and expression analyses of fasciclin-like arabinogalactan proteins reveal functional conservation during embryo and seed development"],"prefix":"10.1007","volume":"32","author":[{"given":"M\u00e1rio","family":"Costa","sequence":"first","affiliation":[]},{"given":"Ana Marta","family":"Pereira","sequence":"additional","affiliation":[]},{"given":"Sara Cristina","family":"Pinto","sequence":"additional","affiliation":[]},{"given":"Jessy","family":"Silva","sequence":"additional","affiliation":[]},{"given":"Lu\u00eds Gustavo","family":"Pereira","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9421-2538","authenticated-orcid":false,"given":"S\u00edlvia","family":"Coimbra","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2019,9,9]]},"reference":[{"key":"376_CR1","doi-asserted-by":"publisher","first-page":"745","DOI":"10.1016\/0092-8674(87)90072-9","volume":"48","author":"MJ Bastiani","year":"1987","unstructured":"Bastiani MJ, Harrelson AL, Snow PM, Goodman CS (1987) Expression of fasciclin I and II glycoproteins on subsets of axon pathways during neuronal development in the grasshopper. 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