Does abscisic acid affect strigolactone biosynthesis

Strigolactones are considered a novel class of plant hormones that, in addition to their endogenous signalling function, are exuded into the rhizosphere acting as a signal to stimulate hyphal branching of arbuscular mycorrhizal (AM) fungi and germination of root parasitic plant seeds. Considering th...

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Vydáno v:	The New phytologist Ročník 187; číslo 2; s. 343 - 354
Hlavní autoři:	López-Ráez, Juan A, Kohlen, Wouter, Charnikhova, Tatsiana, Mulder, Patrick, Undas, Anna K, Sergeant, Martin J, Verstappen, Francel, Bugg, Timothy D.H, Thompson, Andrew J, Ruyter-Spira, Carolien, Bouwmeester, Harro
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Oxford, UK Oxford, UK : Blackwell Publishing Ltd 01.07.2010 Blackwell Publishing Blackwell Publishing Ltd Wiley Subscription Services, Inc
Témata:	9-cis-epoxycarotenoid dioxygenase Abscisic acid abscisic acid (ABA) Abscisic Acid - biosynthesis Abscisic Acid - metabolism Arbuscular mycorrhizas Biosynthesis Biosynthetic Pathways Biosynthetic Pathways - drug effects branching Carotenoids Carotenoids - metabolism Chromatography, Liquid Cleavage deficiency Deficient mutant Dioxygenase drug effects Enzyme Inhibitors Enzyme Inhibitors - pharmacology Enzymes Fungi Gene expression Gene expression regulation Gene Expression Regulation, Plant Gene Expression Regulation, Plant - drug effects Genes Genes, Plant Genes, Plant - genetics genetics Germination Germination - drug effects growth & development hormone regulation Hormones hyphae Inhibitors Lactones Lactones - metabolism Lycopersicon esculentum Lycopersicon esculentum - drug effects Lycopersicon esculentum - genetics Lycopersicon esculentum - metabolism Mass Spectrometry metabolism mutants Mutation Mutation - genetics Orobanche Orobanche - drug effects Orobanche - growth & development Orobanche - metabolism Parasitic plants pharmacology Phosphates Phosphates - deficiency Phosphates - metabolism Phytohormones Plant Exudates Plant Exudates - metabolism Plant growth substances Plant hormones Plant Roots Plant Roots - drug effects Plant Roots - metabolism Plant Shoots Plant Shoots - metabolism Plants Reverse Transcriptase Polymerase Chain Reaction Rhizosphere Root exudates roots Seeds Solanum lycopersicum Starvation strigolactones tomato Tomatoes vesicular arbuscular mycorrhizae
ISSN:	0028-646X, 1469-8137, 1469-8137
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Popis
Shrnutí:	Strigolactones are considered a novel class of plant hormones that, in addition to their endogenous signalling function, are exuded into the rhizosphere acting as a signal to stimulate hyphal branching of arbuscular mycorrhizal (AM) fungi and germination of root parasitic plant seeds. Considering the importance of the strigolactones and their biosynthetic origin (from carotenoids), we investigated the relationship with the plant hormone abscisic acid (ABA). Strigolactone production and ABA content in the presence of specific inhibitors of oxidative carotenoid cleavage enzymes and in several tomato ABA-deficient mutants were analysed by LC-MS/MS. In addition, the expression of two genes involved in strigolactone biosynthesis was studied. The carotenoid cleavage dioxygenase (CCD) inhibitor D2 reduced strigolactone but not ABA content of roots. However, in abamineSG-treated plants, an inhibitor of 9-cis-epoxycarotenoid dioxygenase (NCED), and the ABA mutants notabilis, sitiens and flacca, ABA and strigolactones were greatly reduced. The reduction in strigolactone production correlated with the downregulation of LeCCD7 and LeCCD8 genes in all three mutants. The results show a correlation between ABA levels and strigolactone production, and suggest a role for ABA in the regulation of strigolactone biosynthesis.
Bibliografie:	http://dx.doi.org/10.1111/j.1469-8137.2010.03291.x These authors contributed equally to this work. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	0028-646X 1469-8137 1469-8137
DOI:	10.1111/j.1469-8137.2010.03291.x