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2014 | 36 | 12 |

Tytuł artykułu

Study on the bioactivity of steviol and isosteviol in stevia (Stevia rebaudiana Bertoni)

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Steviol and isosteviol are diterpene metabolites that are produced from a shared biosynthesis pathway with gibberellins in stevia leaves. These compounds share a chemically similar structure with gibberellins. An experiment was conducted to find the bioactivity properties of steviol and isosteviol in stevia. During vegetative growth, external solutions of steviol and isosteviol (1.6 × 10⁻⁵ and 1 × 10⁻⁵ M, respectively) were sprayed on stevia shoots and then the stevia growth and metabolites were assessed. The results showed that the stevia leaf growth was reduced by external application of steviol. The leaf growth was not affected by external isosteviol while the stevia height and stem dry weight significantly increased. The antioxidant capacity and steviol glycosides content were increased by external steviol. Our results implicated that the isosteviol bioactivity is similar to that of gibberellin hormone. On the other hand, steviol induces the antioxidant system and stimulates the steviol glycosides biosynthesis in stevia leaves.

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Opis fizyczny



  • Department of Agronomy and Plant Breeding, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
  • Department of Secondary Metabolites, Agricultural Biotechnology Research Institute of Iran (ABRII), Branch of Central Region of Iran Isfahan, Iran
  • Department of Agronomy and Plant Breeding, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
  • Department of Agronomy and Plant Breeding, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
  • Department of Agronomy and Plant Breeding, Faculty of Agricultural Science, Guilan University, Rasht, Iran


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