scholarly journals New insights into the signaling pathways controlling defense gene expression in rice roots during the arbuscular mycorrhizal symbiosis

2011 ◽  
Vol 6 (4) ◽  
pp. 553-557 ◽  
Author(s):  
Lidia Campos-Soriano ◽  
Blanca San Segundo
Keyword(s):  
Gene Expression ◽  
Signaling Pathways ◽  
Arbuscular Mycorrhizal ◽  
Arbuscular Mycorrhizal Symbiosis ◽  
Mycorrhizal Symbiosis ◽  
Defense Gene Expression ◽  
Defense Gene ◽  
Rice Roots

Arbuscular mycorrhizal symbiosis is accompanied by local and systemic alterations in gene expression and an increase in disease resistance in the shoots

2007 ◽  
Vol 50 (3) ◽  
pp. 529-544 ◽  
Author(s):  
Jinyuan Liu ◽  
Ignacio Maldonado-Mendoza ◽  
Melina Lopez-Meyer ◽  
Foo Cheung ◽  
Christopher D. Town ◽  
...  
Keyword(s):  
Gene Expression ◽  
Disease Resistance ◽  
Arbuscular Mycorrhizal ◽  
Arbuscular Mycorrhizal Symbiosis ◽  
Mycorrhizal Symbiosis

scholarly journals Mycorrhiza Regulates Signal Substance Levels and Pathogen Defense Gene Expression to Resist Citrus Canker

2019 ◽  
Vol 47 (4) ◽  
pp. 1161-1167 ◽  
Author(s):  
Miao-Miao XIE ◽  
Yi-Can ZHANG ◽  
Li-Ping LIU ◽  
Ying-Ning ZOU ◽  
Qiang-Sheng WU ◽  
...  
Keyword(s):  
Gene Expression ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Citrus Canker ◽  
Poncirus Trifoliata ◽  
Digital Object Identifier ◽  
Pathogen Defense ◽  
Gene Expressions ◽  
Defense Gene Expression ◽  
Defense Gene

Citrus canker is a quarantined disease, severely harming citrus plants. Soil beneficial arbuscular mycorrhizal fungi (AMF) can provide a biological control pathway to resist pathogens. This work was to test changes of signal substances including hydrogen peroxide (H2O2), nitric oxide (NO), calmodulin (CaM), salicylic acid (SA) and jasmonic acid (JA) and the pathogen defense gene expression in roots of AMF (Paraglomus occultum) and non-AMF trifoliate orange (Poncirus trifoliata) seedlings after infected by a expressions citrus canker pathogen (Xanthomonas axonopodis pv. Citri, Xac). AMF inoculation significantly improved plant height, stem diameter and leaf number. Xac infection dramatically decreased root H2O2, NO, and SA levels, but increased root CaM and JA concentrations in non-AMF seedlings. There were higher H2O2 and CaM levels and lower JA levels in Xac-infected seedlings than in non-Xac-infected seedlings under mycorrhization. Under non-Xac infection, mycorrhizal treatment reduced root H2O2, NO, and SA but increased CaM and JA levels. However, under Xac infection, mycorrhizal inoculation distinctly accelerated root H2O2, NO, CaM, and SA accumulation, accompanied with up-regulated expression levels of root PtEPS1 (enhance pseudomonas susceptibility 1) and PtPR4 (pathogenesis related gene 4), indicating that Xac stimulated mycorrhizal roles in enhancing resistance of citrus canker. Such results imply that citrus plants with pre-inoculated AMF had stronger resistance to Xac infection through increasing signal substrate accumulation and pathogen defense gene expressions.   ********* In press - Online First. Article has been peer reviewed, accepted for publication and published online without pagination. It will receive pagination when the issue will be ready for publishing as a complete number (Volume 47, Issue 4, 2019). The article is searchable and citable by Digital Object Identifier (DOI). DOI link will become active after the article will be included in the complete issue. *********

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