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Title

A suggested model for potato MIVOISAP involving functions of central carbohydrate and amino acid metabolism, as well as actin cytoskeleton and endocytosis

AuthorsEzquer, Ignacio ; Li, Jun ; Ovecka, Miroslav ; Baroja-Fernández, Edurne ; Muñoz Pérez, Francisco José ; Montero, Manuel ; Hidalgo, Maite ; Sesma, María Teresa ; Bahaji, Abdellatif ; Pozueta Romero, Javier
KeywordsStarch
Microbial volatiles
Sucrose synthase
ADPglucose
Carbohydrate
Metabolism
Issue DateDec-2010
PublisherLandes Bioscience
CitationPlant Signaling and Behavior 5(12): 1638-1641 (2010)
AbstractWe have recently found that microbial species ranging from Gramnegative and Gram-positive bacteria to different fungi emit volatiles that strongly promote starch accumulation in leaves of both mono- and di-cotyledonous plants. Transcriptome and enzyme activity analyses of potato leaves exposed to volatiles emitted by Alternaria alternate revealed that starch over-accumulation was accompanied by enhanced 3-phosphoglycerate to Pi ratio, and changes in functions involved in both central carbohydrate and amino acid metabolism. Exposure to microbial volatiles also promoted changes in the expression of genes that code for enzymes involved in endocytic uptake and traffic of solutes. With the overall data we propose a metabolic model wherein important determinants of accumulation of exceptionally high levels of starch include (a) upregulation of ADPglucose-producing SuSy, starch synthase III and IV, proteins involved in the endocytic uptake and traffic of sucrose, (b) downregulation of acid invertase, starch breakdown enzymes and proteins involved in internal amino acid provision and (c) 3-phosphoglycerate-mediated allosteric activation of ADPglucose pyrophosphorylase.
DescriptionEzquer, Ignacio [et. al]. 4 p., 1 figure and bibliography
Publisher version (URL)http://dx.doi.org/10.4161/psb.5.12.13808
URIhttp://hdl.handle.net/10261/48885
DOI10.4161/psb.5.12.13808
ISSN1559-2316
E-ISSN1559-2324
Appears in Collections:(IDAB) Artículos
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