*4.11. Network Construction of PpaPrx19*

The Search Tool for the Retrieval of Interacting Genes/Proteins database (STRING v11) was used to construct the network associated with PpaPrx19. The sequence of PpaPrx19 was loaded in the database and STRING generated a protein–protein interaction (PPI) network with proteins that have interactions with the target protein. Interactions were obtaining with medium confidence from curated databases and textmining.

**Supplementary Materials:** The following are available online at https://www.mdpi.com/article/10 .3390/plants10071476/s1, Figure S1: Effect of different abiotic stresses on *PpaPrx19* gene expression, Figure S2: Graphical representation of the proteins PpaPrx9 (PP1S306\_37V6.1) has interactions with. Table S1. List of coexpression patterns obtained for PpaPrx19 in Phytozome (https://phytozome.jgi. doe.gov/pz/portal.html), accessed on 8 July 2021.

**Author Contributions:** Conceptualization, F.P., E.N.-U., T.M.-C.; methodology, T.M.-C.; formal analysis, T.M.-C., E.N.-U.; investigation, T.M.-C.; writing—original draft preparation, E.N.-U.; writing review and editing, T.M.-C., E.N.-U., F.P.; supervision, E.N.-U., F.P.; funding acquisition, E.N.-U., F.P. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by Xunta de Galicia (Spain), grant number INCITE 08PXIB103182PR. E.N.-U. holds an FCT postdoctoral fellowship (SFRH/BPD/112587/2015).

**Data Availability Statement:** The data is contained within the article.

**Acknowledgments:** *P. patens* was kindly provided by Alonso Rodríguez-Navarro from the Biotechnology Department of Universidad Politécnica (Madrid, Spain). The proteomic analysis assistance of Jesús Mateos (INIBIC, A Coruña, Spain) is gratefully acknowledged.

**Conflicts of Interest:** The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.

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