Physiological, biochemical, antioxidant and growth characterizations of gibberellin and paclobutrazol-treated sweet leaf (Stevia rebaudiana B.) herb

  • Shokoofeh Hajihashemi
Short Communication


A greenhouse experiment was designed to study the responses of Stevia rebaudiana herb to paclobutrazol (PBZ) and gibberellin (GA) treatments. GA and PBZ treatments caused no significant impact on photosynthesis pigments while they increased carbohydrates, amino acids and protein metabolites. Stevia showed a potent antioxidant activity through scavenging DPPH, NO·; O 2 ·− and OH· radicals which was highlighted in GA and PBZ treatments. The enzymatic and non-enzymatic antioxidant system of Stevia plant showed a significant increase in response to PBZ and GA treatments. PBZ treatment decreased plant growth while GA treatment had no significant effect on it. Collectively, both GA and PBZ treatments effectively increased metabolites and antioxidant property of Stevia herb.


Antioxidant Gibberellin Growth Metabolites Paclobutrazol Stevia rebaudiana 







Ferric reducing antioxidant power


Leaf fresh mass


Leaf water content


Reduced glutathione


Oxidized glutathione


Murashige and Skoog


Pyrroline-5-carboxylate synthetase


Reactive oxygen species


Steviol glycosides


Superoxide dismutase


Water soluble carbohydrates


Compliance with ethical standards

Conflict of interest

The author declares that she has no conflict of interest.


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Copyright information

© Society for Plant Biochemistry and Biotechnology 2017

Authors and Affiliations

  1. 1.Plant Biology Department, Faculty of ScienceBehbahan Khatam Alanbia University of TechnologyBehbahanIran

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