Abstract
Preservation of lutein concentrations in wheat-based end-products during processing is important both for product quality and nutritional value. A key constituent involved in lutein degradation is endogenous lipoxygenase. Lutein and lutein ester concentrations were compared at intervals during storage of noodle sheets prepared from flour of wheat varieties representing a range in lipoxygenase activity, as well as in different mill streams and in different grain tissues. Higher lipoxygenase concentration was associated with an increased loss of free lutein and lutein mono-esters whereas lutein diesters appeared to be more resistant to degradation. Lutein degradation was reduced in the presence of a lipoxygenase inhibitor, when noodle sheets were heated to destroy enzyme activity or when pH was increased. In addition, three populations were used to investigate the genetic control of lipoxygenase. A previously reported mutation of Lpx-B1.1 was associated with a reduction in activity from high to intermediate whilst a new locus on chromosome 4D was associated with variation between intermediate and near-zero. The gene underlying the 4D locus is a putative lipoxygenase. Stability of lutein could be improved by deployment of the mutations at the 4B and 4D loci and/or by post-harvest storage of grain under conditions that promote esterification.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Higher lipoxygenase concentration was associated with increased loss of free lutein and lutein mono-esters.
- Taxon
- Wheat
Triticum aestivumt0 - Gene
- lipoxygenasee0
- Outcome
- loss of free lutein and lutein mono-esterse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher lipoxygenase concentration was associated with an increased loss of free lutein and lutein mono-esters”
t0“Wheat”
Claim · model-written summary
Lutein diesters appeared more resistant to degradation.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- lutein diesterse0
- Direction
- more resistante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lutein diesters appeared to be more resistant to degradation”
t0“Wheat”
Claim · model-written summary
A lipoxygenase inhibitor reduced lutein degradation.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- a lipoxygenase inhibitore0
- Outcome
- Lutein degradatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lutein degradation was reduced in the presence of a lipoxygenase inhibitor”
t0“Wheat”
Claim · model-written summary
Heating noodle sheets to destroy enzyme activity reduced lutein degradation.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- noodle sheets were heatede0
- Outcome
- Lutein degradatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lutein degradation was reduced in the presence of a lipoxygenase inhibitor, when noodle sheets were heated to destroy enzyme activity”
t0“Wheat”
Claim · model-written summary
Increasing pH reduced lutein degradation.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- pH was increasede0
- Outcome
- Lutein degradatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lutein degradation was reduced in the presence of a lipoxygenase inhibitor, when noodle sheets were heated to destroy enzyme activity or when pH was increased”
t0“Wheat”
Claim · model-written summary
An Lpx-B1.1 mutation was associated with reduced lipoxygenase activity from high to intermediate.
- Taxon
- WheatTriticum aestivumt0
- Gene
- Lpx-B1.1e0
- Outcome
- activitye0
- Direction
- reductione0
- Qualifier
- from high to intermediatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A previously reported mutation of Lpx-B1.1 was associated with a reduction in activity from high to intermediate”
t0“Wheat”
Claim · model-written summary
A chromosome 4D locus was associated with variation in lipoxygenase activity between intermediate and near-zero.
- Taxon
- WheatTriticum aestivumt0
- Gene
- new locus on chromosome 4De0
- Outcome
- variation between intermediate and near-zeroe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a new locus on chromosome 4D was associated with variation between intermediate and near-zero”
t0“Wheat”
Claim · model-written summary
The gene underlying the 4D locus is a putative lipoxygenase.
- Taxon
- WheatTriticum aestivumt0
- Gene
- 4D locuse0
- Outcome
- putative lipoxygenasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The gene underlying the 4D locus is a putative lipoxygenase”
t0“Wheat”
Claim · model-written summary
Authors suggest 4B and 4D mutations and storage favoring esterification to improve lutein stability.
- Taxon
- WheatTriticum aestivumt0
- Gene
- 4B and 4D locie0
- Outcome
- Stability of luteine0
- Qualifier
- post-harvest storage of grain under conditions that promote esterificatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stability of lutein could be improved by deployment of the mutations at the 4B and 4D loci and/or by post-harvest storage of grain under conditions that promote esterification”
t0“Wheat”
The same questions in other papers
ph · molecular: metabolites · Triticum aestivum (wheat)Positive and negative results
4 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- negative
- negative
7 papers more in this group
See all 11 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.