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. 2019 Jun 4;10:631. doi: 10.3389/fpls.2019.00631

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Copyright © 2019 Walls, Cooper, Elser, Gandolfo, Mungall, Smith, Stevenson and Jaiswal.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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An ontology graph of the Plant embryo development stage and related terms in the PO. Developmental stages are ordered temporally using the precedes and preceded by relations. Because a sporophyte vegetative stage begins after the first division of the plant zygote in the plant zygote stage, all plant embryo development stages are preceded by a plant zygote stage. Therefore, plant embryo development stage is a subclass of sporophyte vegetative stage. The majority of the embryo development stages are defined commonly among taxa, but differences are highlighted in yellow (dicots only) and green colored boxes (monocots only).