Effects of photoperiod, growth temperature and cold acclimatisation on glucosinolates, sugars and fatty acids in kale.

Abstract:

:Curly kale is a robust, cold tolerant plant with a high content of health-promoting compounds, grown at a range of latitudes. To assess the effects of temperature, photoperiod and cold acclimatisation on levels of glucosinolates, fatty acids and soluble sugars in kale, an experiment was set up under controlled conditions. Treatments consisted of combinations of the temperatures 15/9 or 21/15 °C, and photoperiods of 12 or 24h, followed by a cold acclimatisation period. Levels of glucosinolates and fatty acid types in leaves were affected by growth conditions and cold acclimatisation, being generally highest before acclimatisation. The effects of growth temperature and photoperiod on freezing tolerance were most pronounced in plants grown without cold acclimatisation. The results indicate that cold acclimatisation can increase the content of soluble sugar and can thereby improve the taste, whilst the content of unsaturated fatty and glucosinolates acids may decrease.

journal_name

Food Chem

journal_title

Food chemistry

authors

Steindal AL,Rødven R,Hansen E,Mølmann J

doi

10.1016/j.foodchem.2014.10.129

subject

Has Abstract

pub_date

2015-05-01 00:00:00

pages

44-51

eissn

0308-8146

issn

1873-7072

pii

S0308-8146(14)01703-8

journal_volume

174

pub_type

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