4.6 Article

Effects of plant growth regulators on the contents of rutin, hyperoside and quercetin in Hypericum attenuatum Choisy

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PLOS ONE
卷 18, 期 5, 页码 -

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PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0285134

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In this study, it was found that spraying 1 mg/L naphthalene acetic acid at the early growth stage significantly increased the rutin content, spraying 100 mg/L mepiquat chloride increased the hyperoside content, and spraying 2 mg/L naphthalene acetic acid increased the quercetin content in Hypericum attenuatum Choisy.
To explore the accumulation of rutin, hyperoside and quercetin in Hypericum attenuatum Choisy under treatment with different plant growth regulators, 100 mg/L, 200 mg/L and 300 mg/L cycocel, 100 mg/L, 200 mg/L and 300 mg/L mepiquat chloride and 1 mg/L, 2 mg/L and 3 mg/L naphthalene acetic acid were foliage sprayed on Hypericum attenuatum Choisy plants at the early growth stage. We sampled and determined the important flavonoid contents at the flowering stage. The results showed that the three plant growth regulators had different effects on the accumulation of rutin, hyperoside and quercetin in the leaves, stems and flowers of Hypericum attenuatum Choisy at the flowering stage. After spraying 1 mg/L naphthalene acetic acid at the early growth stage, the rutin contents in the leaves, stems and flowers increased by approximately 60.33%, 223.85% and 192.02%, respectively (P < 0.05). Spraying 100 mg/L mepiquat chloride increased the hyperoside contents in the leaves and flowers by approximately 7.77% and 12.87%, respectively (P < 0.05). Spraying 2 mg/L naphthalene acetic acid significantly increased the quercetin contents in the flowers and leaves by approximately 95.62% and 47.85%, respectively (P < 0.05). Therefore, at the early growth stage, spraying 1 mg/L naphthalene acetic acid significantly increased rutin content, spraying 100 mg/L mepiquat chloride significantly increased hyperoside content, and spraying 2 mg/L naphthalene acetic acid significantly increased quercetin content in Hypericum attenuatum Choisy. In conclusion, the accumulation of flavonoids in Hypericum attenuatum Choisy was regulated by plant growth regulators.

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