5. Conclusion
In conclusion, the present study shows that cold acclimatisation
conditions generally led to some reductions in the content of both
total and individual glucosinolates. Although, some glucosinolates
were unaffected by cold acclimatisation and sinigrin was higher.
In addition, the pre-cold acclimatisation temperature and photoperiod
conditions also affected the content, short day and high temperatures
being favourable for the main aliphatic glucosinolate,
glucoiberin. The overall fatty acid contents were lower after cold
acclimatisation and the highest level of a-linolenic acid (18:3)
was observed at 12 h day length at low growth temperatures. The
content of soluble sugars, especially sucrose and D-fructose was
highest after exposure to cold acclimatisation. This means that, to
optimise high-intake of unsaturated fatty acids and glucosinolates
from kale, it may be more favourable to harvest leaves before exposure
to low acclimatisation temperatures, in the late autumn/winter
season. Sugars on the other hand would increase the
sweetness of the leaf when exposed to low acclimatisation temperatures.
These findings mean that careful and precise harvest planning
can balance sensory quality and health beneficial properties
5. ConclusionIn conclusion, the present study shows that cold acclimatisationconditions generally led to some reductions in the content of bothtotal and individual glucosinolates. Although, some glucosinolateswere unaffected by cold acclimatisation and sinigrin was higher.In addition, the pre-cold acclimatisation temperature and photoperiodconditions also affected the content, short day and high temperaturesbeing favourable for the main aliphatic glucosinolate,glucoiberin. The overall fatty acid contents were lower after coldacclimatisation and the highest level of a-linolenic acid (18:3)was observed at 12 h day length at low growth temperatures. Thecontent of soluble sugars, especially sucrose and D-fructose washighest after exposure to cold acclimatisation. This means that, tooptimise high-intake of unsaturated fatty acids and glucosinolatesfrom kale, it may be more favourable to harvest leaves before exposureto low acclimatisation temperatures, in the late autumn/winterseason. Sugars on the other hand would increase thesweetness of the leaf when exposed to low acclimatisation temperatures.These findings mean that careful and precise harvest planningcan balance sensory quality and health beneficial properties
การแปล กรุณารอสักครู่..
