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Genetic manipulation of xanthophyll synthesis to sustain ABA accumulation

ReferenceP15875
Principal Investigator / Supervisor Professor Andrew Thompson
Co-Investigators /
Co-Supervisors
Institution University of Warwick
DepartmentWarwick HRI
Funding typeResearch
Value (£) 29,632
StatusCompleted
TypeResearch Grant
Start date 01/10/2001
End date 01/10/2004
Duration36 months

Abstract

Zeaxanthin is the first compound formed in the branch of the xanthophyll pathway which provides the C40 precursors needed to sustain ABA biosynthesis. Formation of zeaxanthin is catalysed by beta-carotene hydroxylase. Constructs will be designed to overexpress beta-carotene hydroxylase in transgenic tomato plants, in order to prevent excessive depletion of zeaxanthin. Unstressed plants over-producing ABA, due to ectopic expression of 9-cis-epoxycarotenoid dioxygenase (LeNCED1) gene, can undergo photobleaching. Detailed analysis and manipulation of the rates of input (via the hydroxylase), output (via NCED) and the interconversion of intermediates (via neoxanthin synthase) in this vital branch of xanthophyll synthesis, will be undertaken. (Joint with grant 42/P15873).

Summary

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