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Elemental sulphur metabolism in plants and defence against fungal pathogens

Reference	P09332
Principal Investigator / Supervisor	Dr Richard Cooper
Co-Investigators / Co-Supervisors	Professor Malcolm Hawkesford
Institution	University of Bath
Department	Biology and Biochemistry
Funding type	Research
Value (£)	46,810
Status	Completed
Type	Research Grant
Start date	01/07/1998
End date	01/07/1999
Duration	12 months

Abstract

Endogenous elemental sulphur (as S8) has been linked with preformed and induced defences of plants. We found S8 accumulates and persists in hypersensitive (HR) xylem parenchyma cell and impregnates cell walls and vascular gels in resistant vars of Theobroma cacao inoculated with Verticillium dahliae. Also S8 accumulates in tomato stem and root xylem infected with V. dahliae. Production of S8 in plants is by an uncharacterised pathway probably involving oxidation of sulphide, which may derive from degradation of glutathione or from glutathione via non-enzymic S deposition as part of its protective role during the oxidative burst linked with HR. We aim to survey various plant families for S occurrence as a component of resistance to vascular, leaf or stem-infecting fungi as a prelude to examination of the effect of S nutrition on S distribution in planta and on resistance and determination of the metabolic intermediates and enzymes involved in S8 formation.

Summary

unavailable

Committee	Closed Committee - Plant & Microbial Sciences (PMS)
Research Topics	X – not assigned to a current Research Topic
Research Priority	X – Research Priority information not available
Research Initiative	X - not in an Initiative
Funding Scheme	X – not Funded via a specific Funding Scheme

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