Identification and analysis of phenylpropanoid biosynthetic genes and phenylpropanoid accumulation in watercress (Nasturtium officinale R. Br.)
Tóm tắt
Watercress (Nasturtium officinale R. Br.) is a cruciferous plant consumed by people worldwide. This vegetable contains numerous health-benefiting compounds; however, gene information and metabolomic profiling of individual parts for this plant species are scarce. In this study, we investigated the expression patterns of phenylpropanoid biosynthetic genes and the content of phenylpropanoids in different parts of watercress. We identified 11 genes encoding enzymes related to the phenylpropanoid biosynthetic pathway and analyzed the expression patterns of these genes in the leaves, stems, roots, flowers, and seeds of watercress. The result showed that most of the genes were expressed at the highest levels in the flowers. HPLC analysis performed in samples from these same parts revealed the presence of seven phenylpropanoid-derived compounds. The content of total phenylpropanoids was the highest in flowers, followed by that in the leaves, whereas the lowest level was generally detected in the stems. Rutin was the most abundant phenylpropanoid in all plant segments, while quercetin was detected only in the flowers and roots. This study provides useful information for further molecular and functional research involving N. officinale and closely related species.
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