Rice responds to endophytic colonization which is independent of the common symbiotic signaling pathway

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dc.creatorChen, Xi
dc.creatorMiché, Lucie
dc.creatorSachs, Sabrina
dc.creatorWang, Qi
dc.creatorBuschart, Anna
dc.creatorYang, Haiyuan
dc.creatorVera Cruz, Casiana M.
dc.creatorHurek, Thomas
dc.creatorReinhold-Hurek, Barbara
dc.date2015-10
dc.date2024-12-19T12:55:03Z
dc.date2024-12-19T12:55:03Z
dc.date.accessioned2026-06-27T04:13:05Z
dc.descriptionAs molecular interactions of plants with N2‐fixing endophytes are largely uncharacterized, we investigated whether the common signaling pathway (CSP) shared by root nodule symbioses (RNS) and arbuscular mycorrhizal (AM) symbioses may have been recruited for the endophytic Azoarcus sp.–rice (Oryza sativa) interaction, and combined this investigation with global approaches to characterize rice root responses to endophytic colonization. Putative homologs of genes required for the CSP were analyzed for their putative role in endophytic colonization. Proteomic and suppressive subtractive hybridization (SSH) approaches were also applied, and a comparison of defense‐related processes was carried out by setting up a pathosystem for flooded roots with Xanthomonas oryzae pv. oryzae strain PXO99 (Xoo). All tested genes were expressed in rice roots seedlings but not induced upon Azoarcus sp. inoculation, and the oscyclops and oscastor mutants were not impaired in endophytic colonization. Global approaches highlighted changes in rice metabolic activity and Ca2+‐dependent signaling in roots colonized by endophytes, including some stress proteins. Marker genes for defense responses were induced to a lesser extent by the endophytes than by the pathogen, indicating a more compatible interaction. Our results thus suggest that rice roots respond to endophytic colonization by inducing metabolic shifts and signaling events, for which the CSP is not essential.As molecular interactions of plants with N2‐fixing endophytes are largely uncharacterized, we investigated whether the common signaling pathway (CSP) shared by root nodule symbioses (RNS) and arbuscular mycorrhizal (AM) symbioses may have been recruited for the endophytic Azoarcus sp.–rice (Oryza sativa) interaction, and combined this investigation with global approaches to characterize rice root responses to endophytic colonization.Putative homologs of genes required for the CSP were analyzed for their putative role in endophytic colonization. Proteomic and suppressive subtractive hybridization (SSH) approaches were also applied, and a comparison of defense‐related processes was carried out by setting up a pathosystem for flooded roots with Xanthomonas oryzae pv. oryzae strain PXO99 (Xoo).All tested genes were expressed in rice roots seedlings but not induced upon Azoarcus sp. inoculation, and the oscyclops and oscastor mutants were not impaired in endophytic colonization. Global approaches highlighted changes in rice metabolic activity and Ca2+‐dependent signaling in roots colonized by endophytes, including some stress proteins. Marker genes for defense responses were induced to a lesser extent by the endophytes than by the pathogen, indicating a more compatible interaction.Our results thus suggest that rice roots respond to endophytic colonization by inducing metabolic shifts and signaling events, for which the CSP is not essential.
dc.identifierhttps://hdl.handle.net/10568/165411
dc.identifier.urihttp://hdl.handle.net/123456789/25458
dc.languageen
dc.publisherWiley
dc.sourceChen, X., Miché, L., Sachs, S., Wang, Q., Buschart, A., Yang, H., Vera Cruz, C.M., Hurek, T. and Reinhold‐Hurek, B. 2015. Rice responds to endophytic colonization which is independent of the common symbiotic signaling pathway. New Phytologist, Volume 208 no. 2 p. 531-543
dc.subjectdefence mechanism
dc.subjectendophytes
dc.subjectmetabolism
dc.subjectnitrogen fixing bacteria
dc.subjectpathogens
dc.subjectplant pathogenic bacteria
dc.subjectroots
dc.subjectxanthomonas oryzae
dc.titleRice responds to endophytic colonization which is independent of the common symbiotic signaling pathway
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)