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Plant Ontology Release #21 Now Available

We are pleased to announce that the latest release of the Plant Ontology, version #21, is now available on our browser at

One major change you may see is that on August 1, 2015, all the ontology files and issue tracker were moved to a shiny new GitHub Site: ( as part of the Planteome Project. Please update your local browser bookmarks, and come check out the new functionalities.

* This full release of the PO features the addition of 37 new PO terms, for both the ''Plant Anatomical Entity (PAE)'' (31) and ''Plant Structure Development Stage (PSDS)'' (6) branches of the ontology.

* Names have been revised for 23 PAE terms and 21 PSDS terms, and definitions of many more terms have also been revised and updated.

* This Release also includes new and updated annotation data for five species: Maize (307), Arabidopsis (3339), soybean (34), Medicago (81), and tomato (147), generated as part of the Plant Phenotype Pilot Project ( ) and compiled by the POC. The rice annotations (279) were added in Version #20. All these annotations refer to genes associated with characterized mutant phenotypes.

* Additional annotation data was contributed by our collaborators for Soybean QTLs (SoyBase) and and Arabidopsis thaliana genes (TAIR).

For complete information about the changes in Release #21, please see: and refer to the Release Notes on PO home page: (

Plant Ontology at ASPB Plant Biology 2014

The Plant Ontology ( will be represented at the ASPB Plant Biology 2014 ( meeting in Portland, Oregon July 12th-16th.

Representatives of the PO, along with several other plant genome databases, will be present at the Plant Genome Resources Outreach Booth: (# 415) throughout the meeting to answer questions and interact with users. You can find a schedule at the booth in Exhibit Hall A-B.

Visit our poster (P41006-C) to learn more about recent developments in Reference Ontologies for Plants and Tools for Integrative Plant Genomics.

Also, plan to attend the Special Minisymposium: Bioinformatic Resources for Plant Biology Research, Sunday July 13th, from 7:45 PM to 10:00 PM in room A106.
This workshop will provide an overview of a variety of tools and resources of interest to plant biology researchers.

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