Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/1860
Título: Effect of photoperiod on flavonoid pathway activity in sweet potato (Ipomoea batatas (L.) Lam.) leaves
Autor: Carvalho, Isabel Saraiva de
Cavaco, Teresa
Carvalho, Lara M.
Duque, Paula
Palavras-chave: Anthocyanins
Catechins
Flavonoid pathway
Flavonols
HPLC
Hydroxycinnamic acids
Hydroxybenzoic acids
Photoperiod
RT-PCR
Sweet potato
Gene expression
Data: Jan-2010
Editora: Elsevier
Resumo: Compared with those of major commercial leafy vegetables, leaves of sweet potato have higher contents of flavonoids and phenolic acids, which provide significant health benefits and may be used as natural colourants. We have analysed the expression of key flavonoid biosynthesis genes using RT-PCR and the accumulation of polyphenolic compounds using high-performance liquid chromatography coupled to a photodiode-array detector, during the development of leaves of sweet potato plants growing under either long day or short day photoperiods. A massive induction of flavonoid pathway gene expression, correlating with a dramatic increase in the content of an anthocyanin, catechins, flavonols, hydroxycinnamic acids and hydroxybenzoic acids, was observed during sweet potato leaf exposure to a long day photoperiod. These results provide further support for the protective role of flavonoids and phenolic acids against enhanced light exposure in plants.
Peer review: yes
URI: http://hdl.handle.net/10400.1/1860
DOI: http://dx.doi.org/10.1016/j.foodchem.2009.05.005
Versão do Editor: http://dx.doi.org/10.1016/j.foodchem.2009.05.005
Aparece nas colecções:FCT2-Artigos (em revistas ou actas indexadas)



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