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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Veröffentlicht in:The New phytologist Jg. 187; H. 2; S. 343 - 354
Hauptverfasser: 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
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Oxford, UK Oxford, UK : Blackwell Publishing Ltd 01.07.2010
Blackwell Publishing
Blackwell Publishing Ltd
Wiley Subscription Services, Inc
Schlagworte:
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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Zusammenfassung: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.
Bibliographie:http://dx.doi.org/10.1111/j.1469-8137.2010.03291.x
These authors contributed equally to this work.
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ISSN:0028-646X
1469-8137
1469-8137
DOI:10.1111/j.1469-8137.2010.03291.x