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Plants (Basel)

Title:		"Bacterial Compound N,N-Dimethylhexadecylamine Modulates Expression of Iron Deficiency and Defense Response Genes in Medicago truncatula Independently of the Jasmonic Acid Pathway"
Author(s):		Montejano-Ramirez V; Garcia-Pineda E; Valencia-Cantero E;
Address:		"Instituto de Investigaciones Quimico Biologicas, Universidad Michoacana de San Nicolas de Hidalgo, Edifico B3, Ciudad Universitaria, Morelia 58030, Mexico"
Journal Title:		Plants (Basel)
Year:		2020
Volume:		20200514
Issue:		5
Page Number:		-
DOI:		10.3390/plants9050624
ISSN/ISBN:		2223-7747 (Print) 2223-7747 (Electronic) 2223-7747 (Linking)
Abstract:		"Plants face a variety of biotic and abiotic stresses including attack by microbial phytopathogens and nutrient deficiencies. Some bacterial volatile organic compounds (VOCs) activate defense and iron-deficiency responses in plants. To establish a relationship between defense and iron deficiency through VOCs, we identified key genes in the defense and iron-deprivation responses of the legume model Medicago truncatula and evaluated the effect of the rhizobacterial VOC N,N-dimethylhexadecylamine (DMHDA) on the gene expression in these pathways by RT-qPCR. DMHDA increased M. truncatula growth 1.5-fold under both iron-sufficient and iron-deficient conditions compared with untreated plants, whereas salicylic acid and jasmonic acid decreased growth. Iron-deficiency induced iron uptake and defense gene expression. Moreover, the effect was greater in combination with DMHDA. Salicylic acid, Pseudomonas syringae, jasmonic acid, and Botrytis cinerea had inhibitory effects on growth and iron response gene expression but activated defense genes. Taken together, our results showed that the VOC DMHDA activates defense and iron-deprivation pathways while inducing a growth promoting effect unlike conventional phytohormones, highlighting that DMHDA does not mimic jasmonic acid but induces an alternative pathway. This is a novel aspect in the complex interactions between biotic and abiotic stresses"
Keywords:		bacterial organic volatile compound cross-talk in stress-response pathways iron deprivation salicylic acid;
Notes:		"PubMed-not-MEDLINEMontejano-Ramirez, Vicente Garcia-Pineda, Ernesto Valencia-Cantero, Eduardo eng 2.22/Coordinacion de la Investigacion Cientifica (UMSNH)/ Switzerland 2020/05/20 Plants (Basel). 2020 May 14; 9(5):624. doi: 10.3390/plants9050624"