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Molecules 2014, 19(10), 16987-16997; doi:10.3390/molecules191016987

Accumulation of Kaempferitrin and Expression of Phenyl-Propanoid Biosynthetic Genes in Kenaf (Hibiscus cannabinus)

1
Department of Crop Science, Chungnam National University, 99 Daehak-Ro, Yuseong-Gu, Daejeon 305-764, Korea
2
College of Biomedical Science, Kangwon National University, Chuncheon 200-701, Korea
3
Department of Botany and Microbiology, Addiriyah Chair for Environmental Studies, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
4
Visiting Professor Program, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
*
Author to whom correspondence should be addressed.
Received: 3 September 2014 / Revised: 8 October 2014 / Accepted: 15 October 2014 / Published: 23 October 2014
(This article belongs to the Section Natural Products)
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Abstract

Kenaf (Hibiscus cannabinus) is cultivated worldwide for its fiber; however, the medicinal properties of this plant are currently attracting increasing attention. In this study, we investigated the expression levels of genes involved in the biosynthesis of kaempferitrin, a compound with many biological functions, in different kenaf organs. We found that phenylalanine ammonia lyase (HcPAL) was more highly expressed in stems than in other organs. Expression levels of cinnamate 4-hydroxylase (HcC4H) and 4-coumarate-CoA ligase (Hc4CL) were highest in mature leaves, followed by stems and young leaves, and lowest in roots and mature flowers. The expression of chalcone synthase (HcCHS), chalcone isomerase (HcCHI), and flavone 3-hydroxylase (HcF3H) was highest in young flowers, whereas that of flavone synthase (HcFLS) was highest in leaves. An analysis of kaempferitrin accumulation in the different organs of kenaf revealed that the accumulation of this compound was considerably higher (>10-fold) in leaves than in other organs. On the basis of a comparison of kaempferitrin contents with the expression levels of different genes in different organs, we speculate that HcFLS plays an important regulatory role in the kaempferitrin biosynthetic pathway in kenaf. View Full-Text
Keywords: flavone synthase; kaempferitrin; kenaf; phenylpropanoid biosynthesis flavone synthase; kaempferitrin; kenaf; phenylpropanoid biosynthesis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhao, S.; Li, X.; Cho, D.H.; Arasu, M.V.; Al-Dhabi, N.A.; Park, S.U. Accumulation of Kaempferitrin and Expression of Phenyl-Propanoid Biosynthetic Genes in Kenaf (Hibiscus cannabinus). Molecules 2014, 19, 16987-16997.

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