Repository logo
 

Abscisic acid metabolism in a Citrus Sinensis flavedo enzyme system.

dc.contributor.advisorCowan, Ashton Keith.
dc.contributor.authorKalala, Maloji.
dc.date.accessioned2014-12-23T10:39:31Z
dc.date.available2014-12-23T10:39:31Z
dc.date.created1998
dc.date.issued1998
dc.descriptionThesis (M.Sc.Agric.)-University of Natal, Pietermaritzburg, 1998.en
dc.description.abstractThis research project had its major objective the unequivocal demonstration that the plant growth regulator, abscisic acid could be produced in vitro from labelled precursors. In addition, this project was intended to demonstrate the metabolic relationship between β, β-xanthophyll turnover and ABA biosynthesis. Finally attempts were made to isolate the enzyme responsible for the cleavage of the immediate xanthophyll precursor to ABA, 9'-cis-neoxanthin. This was achieved using a cell-free system developed from Citrus flavedo which demonstrated formation of xanthoxal and abscisic acid from zeaxanthin, antheraxanthin, violaxanthin and neoxanthin. In addition product abscisic acid was shown to incorporate label from mevalonic acid lactone establishing the terpenoid origin of this plant growth regulator. 9'-cis-neoxanthin cleavage enzyme was present in the Citrus cell-free system, partially purified, and separated from lipoxygenase activity and shown to convert 9'-cis-neoxanthin into xanthoxal and related but unidentified neutral products.en
dc.identifier.urihttp://hdl.handle.net/10413/11752
dc.language.isoen_ZAen
dc.subjectAbscisic acid.en
dc.subjectPlant regulators.en
dc.subjectGrowth (Plants)--Regulation.en
dc.subjectTheses--Horticultural science.en
dc.titleAbscisic acid metabolism in a Citrus Sinensis flavedo enzyme system.en
dc.typeThesisen

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Kalala_Maloji_1998.pdf
Size:
14.53 MB
Format:
Adobe Portable Document Format
Description:
Thesis.

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.64 KB
Format:
Item-specific license agreed upon to submission
Description: