Canola (Brassica napus) oil from Australian cultivars shows promising levels of tocopherols and carotenoids, along with good oxidative stability

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Abstract

A total of 156 commercial canola seed samples were collected from two growing seasons and tested for oil and protein content, glucosinolate concentration and kernel weight. Extracted oil samples were tested for the bioactive compounds: ß-carotene (mean = 2.03 mg/kg), lutein (64.7), a-tocopherol (263), ?-tocopherol (378) and d-tocopherol (8.94). A subset of 52 oil samples were analyzed for fatty acid profile (FAP) and oxidative stability. Canola cultivar was found to be the dominant influence on many traits, particularly carotenoids and tocopherols, indicating potential breeding opportunities. Previously unreported significant correlations were discovered between the two major carotenoids, lutein and ß-carotene. Additionally, significant (p < 0.01) negative correlations existed between oil content and: ß-carotene (r = -0.33), lutein (r = -0.23), a-tocopherol (r = -0.49), ?-tocopherol (r = -0.22), and d-tocopherol (r = -0.30). Polyunsaturated fatty acid content was significantly (p < 0.01) positively correlated with carotenoid (r = 0.48) and tocopherol (r = 0.60) concentrations. Oxidative stability showed a weak negative correlation with total tocopherols (r = -0.38, p = 0.01) likely due to the over-riding influence of fatty acid profile on oxidative stability, indicating tocopherols may be more influential from a nutritional perspective rather than oil functionality.
Original languageEnglish
Pages (from-to)179-186
Number of pages8
JournalJournal of Food Composition and Analysis
Volume42
DOIs
Publication statusPublished - Sep 2015

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Brassica napus
Tocopherols
Carotenoids
oxidative stability
canola
tocopherols
Oils
carotenoids
oils
cultivars
Lutein
carotenes
lutein
fatty acid composition
Fatty Acids
lipid content
Glucosinolates
glucosinolates
seeds
Unsaturated Fatty Acids

Grant Number

  • 0000100907

Cite this

@article{6699e85218d94574979e593cde0b3ebf,
title = "Canola (Brassica napus) oil from Australian cultivars shows promising levels of tocopherols and carotenoids, along with good oxidative stability",
abstract = "A total of 156 commercial canola seed samples were collected from two growing seasons and tested for oil and protein content, glucosinolate concentration and kernel weight. Extracted oil samples were tested for the bioactive compounds: {\~A}Ÿ-carotene (mean = 2.03 mg/kg), lutein (64.7), a-tocopherol (263), ?-tocopherol (378) and d-tocopherol (8.94). A subset of 52 oil samples were analyzed for fatty acid profile (FAP) and oxidative stability. Canola cultivar was found to be the dominant influence on many traits, particularly carotenoids and tocopherols, indicating potential breeding opportunities. Previously unreported significant correlations were discovered between the two major carotenoids, lutein and {\~A}Ÿ-carotene. Additionally, significant (p < 0.01) negative correlations existed between oil content and: {\~A}Ÿ-carotene (r = -0.33), lutein (r = -0.23), a-tocopherol (r = -0.49), ?-tocopherol (r = -0.22), and d-tocopherol (r = -0.30). Polyunsaturated fatty acid content was significantly (p < 0.01) positively correlated with carotenoid (r = 0.48) and tocopherol (r = 0.60) concentrations. Oxidative stability showed a weak negative correlation with total tocopherols (r = -0.38, p = 0.01) likely due to the over-riding influence of fatty acid profile on oxidative stability, indicating tocopherols may be more influential from a nutritional perspective rather than oil functionality.",
keywords = "Bioactive compounds, Biodiversity and nutrition, Carotenoids, Food analysis, Food composition, Rapeseed, Tocopherols, Vitamin E",
author = "Clare Flakelar and David Luckett and Julia Howitt and Gregory Doran and Paul Prenzler",
note = "Includes bibliographical references.",
year = "2015",
month = "9",
doi = "10.1016/j.jfca.2015.03.010",
language = "English",
volume = "42",
pages = "179--186",
journal = "Journal of Food Composition and Analysis",
issn = "0889-1575",
publisher = "Academic Press",

}

TY - JOUR

T1 - Canola (Brassica napus) oil from Australian cultivars shows promising levels of tocopherols and carotenoids, along with good oxidative stability

AU - Flakelar, Clare

AU - Luckett, David

AU - Howitt, Julia

AU - Doran, Gregory

AU - Prenzler, Paul

N1 - Includes bibliographical references.

PY - 2015/9

Y1 - 2015/9

N2 - A total of 156 commercial canola seed samples were collected from two growing seasons and tested for oil and protein content, glucosinolate concentration and kernel weight. Extracted oil samples were tested for the bioactive compounds: ß-carotene (mean = 2.03 mg/kg), lutein (64.7), a-tocopherol (263), ?-tocopherol (378) and d-tocopherol (8.94). A subset of 52 oil samples were analyzed for fatty acid profile (FAP) and oxidative stability. Canola cultivar was found to be the dominant influence on many traits, particularly carotenoids and tocopherols, indicating potential breeding opportunities. Previously unreported significant correlations were discovered between the two major carotenoids, lutein and ß-carotene. Additionally, significant (p < 0.01) negative correlations existed between oil content and: ß-carotene (r = -0.33), lutein (r = -0.23), a-tocopherol (r = -0.49), ?-tocopherol (r = -0.22), and d-tocopherol (r = -0.30). Polyunsaturated fatty acid content was significantly (p < 0.01) positively correlated with carotenoid (r = 0.48) and tocopherol (r = 0.60) concentrations. Oxidative stability showed a weak negative correlation with total tocopherols (r = -0.38, p = 0.01) likely due to the over-riding influence of fatty acid profile on oxidative stability, indicating tocopherols may be more influential from a nutritional perspective rather than oil functionality.

AB - A total of 156 commercial canola seed samples were collected from two growing seasons and tested for oil and protein content, glucosinolate concentration and kernel weight. Extracted oil samples were tested for the bioactive compounds: ß-carotene (mean = 2.03 mg/kg), lutein (64.7), a-tocopherol (263), ?-tocopherol (378) and d-tocopherol (8.94). A subset of 52 oil samples were analyzed for fatty acid profile (FAP) and oxidative stability. Canola cultivar was found to be the dominant influence on many traits, particularly carotenoids and tocopherols, indicating potential breeding opportunities. Previously unreported significant correlations were discovered between the two major carotenoids, lutein and ß-carotene. Additionally, significant (p < 0.01) negative correlations existed between oil content and: ß-carotene (r = -0.33), lutein (r = -0.23), a-tocopherol (r = -0.49), ?-tocopherol (r = -0.22), and d-tocopherol (r = -0.30). Polyunsaturated fatty acid content was significantly (p < 0.01) positively correlated with carotenoid (r = 0.48) and tocopherol (r = 0.60) concentrations. Oxidative stability showed a weak negative correlation with total tocopherols (r = -0.38, p = 0.01) likely due to the over-riding influence of fatty acid profile on oxidative stability, indicating tocopherols may be more influential from a nutritional perspective rather than oil functionality.

KW - Bioactive compounds

KW - Biodiversity and nutrition

KW - Carotenoids

KW - Food analysis

KW - Food composition

KW - Rapeseed

KW - Tocopherols

KW - Vitamin E

U2 - 10.1016/j.jfca.2015.03.010

DO - 10.1016/j.jfca.2015.03.010

M3 - Article

VL - 42

SP - 179

EP - 186

JO - Journal of Food Composition and Analysis

JF - Journal of Food Composition and Analysis

SN - 0889-1575

ER -