Title of article :
Low and moderate photosynthetically active radiation affects the flavonol glycosides and hydroxycinnamic acid derivatives in kale (Brassica oleracea var. sabellica) dependent on two low temperatures
Author/Authors :
Neugart، نويسنده , , Susanne and Fiol، نويسنده , , Michaela and Schreiner، نويسنده , , Monika and Rohn، نويسنده , , Sascha and Zrenner، نويسنده , , Rita and Kroh، نويسنده , , Lothar W. and Krumbein، نويسنده , , Angelika، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
8
From page :
161
To page :
168
Abstract :
Kale (Brassica oleracea var. sabellica) contains a large number of naturally occurring structurally different non-acylated and acylated flavonol glycosides as well as hydroxycinnamic acid derivatives. The objective of this study was to determine the effect of low and moderate photosynthetic active radiation (PAR) and how these levels interact with low temperature in these phenolic compounds. Juvenile kale plants were treated with PAR levels from 200 to 800 μmol m−2 s−1 at 5 and 10 °C under defined conditions in climate chambers. Of the investigated 20 compounds, 11 and 17 compounds were influenced by PAR and temperature, respectively. In addition, an interaction between PAR and temperature was found for eight compounds. The response of the phenolic compounds to PAR was structure-dependent. While quercetin triglycosides increased with higher PAR at 5 and 10 °C, the kaempferol triglycosides exhibited the highest concentrations at 400 μmol m−2 s−1. In contrast, kaempferol diglycosides exhibited the highest concentrations at increased PAR levels of 600 and 800 μmol m−2 s−1 at 10 °C. However, key genes of flavonol biosynthesis were influenced by temperature but remained unaffected by PAR. Furthermore, there was no interaction between the PAR level and the low temperature in the response of hydroxycinnamic acid derivatives in kale with the exception of caffeoylquinic acid, which decreased with higher PAR levels of 600 and 800 μmol m−2 s−1 and at a lower temperature. In conclusion, PAR and its interaction with temperature could be a suitable tool for modifying the profile of phenolic compounds.
Keywords :
Brassica oleracea , Flavonoids , Quercetin glycosides , Kaempferol glycosides , Photosynthetic active radiation , Hydroxycinnamic acids , Temperature
Journal title :
Plant Physiology and Biochemistry
Serial Year :
2013
Journal title :
Plant Physiology and Biochemistry
Record number :
2124144
Link To Document :
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