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000894587 037__ $$aFZJ-2021-03294
000894587 041__ $$aEnglish
000894587 1001_ $$0P:(DE-Juel1)164665$$aHe, Fang$$b0$$eCorresponding author$$ufzj
000894587 245__ $$aEffects of root temperature on food quality of horticultural crops$$f- 2021-09-19
000894587 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2021
000894587 300__ $$aV, 143 S.
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000894587 4900_ $$aSchriften des Forschungszentrums Jülich. Reihe Energie & Umwelt / Energy & Environment$$v547
000894587 502__ $$aUniversität Bonn, Diss., 2021$$bDissertation$$cUniversität Bonn$$d2021
000894587 520__ $$aDifferent from ambient temperature, root temperature is convenient and economical to manage and control, especially with the development of greenhouse. Understanding the effects of root temperature on plant growth and key food components of horticultural crops under greenhouse conditions is important because of its high economic interest. In Chapter 2,3 and 4, growth and food quality (sugar, antioxidants and minerals) of cocktail tomato($\textit{Lycopersicon esculentum}$ cv “Amoroso” and cv “Delioso”) and Chinese broccoli ($\textit{Brassica oleracea}$ var. $\textit{alboglabra}$ cv “Cuimei”) under different root temperature treatments were investigated. For cocktail tomatoes, reductions of marketable yield per plant in both cultivars were observed in response to root cooling (10°C) in winter, but not significantly in summer, compared to control group (16-27°C). In most cases, root cooling had a positive effect on the sensory and nutritional quality (sugars, vitamin C and carotenoids levels) of cocktail tomatoes. Specifically, 'Delioso' showed an increase in glucose, vitamin C and lycopene concentration of the fruits after root cooling in both seasons, while 'Amoroso' exhibited only higher consistent values in glucose levels. For Chinese broccoli, low root temperature (10 and 15°C) was in general associated with a higher concentration of soluble sugars, total chlorophyll and glucosinolates, but lower mineral levels in stems and leaves than the control group (20°C), regardless of the treatment duration. The yield was reduced with root cooling, but shortening the cooling treatment alleviated this reduction, especially in summer. Manipulation of root temperature could be a feasible method to improve the overall food quality of cocktail tomatoes and Chinese broccoli. However, this effect is dependent on cultivars and other environmental factors.
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000894587 9141_ $$y2021
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