مطالعه تاثيراکسين و جيبرلين بر رشد، محتوای کلروفيلی، کاروتنوئيدی و ترپنوئيدی کل در گياه افوربيا تریگونا (Euphorbia trigona Mill.).

This study was conducted to investigate the effects of auxin and gibberellin on Euphorbia trigona Mill. in a randomized complete block design in greenhouse conditions in 2020. One minute pretreatments including auxin regulators of NAA, IBA and IAA at a concentration of 500 mg / l and treatments containing GA, IAA, IBA and NAA, 250 mg / l were applied and compared with each other and with control plants. Fresh and dry weights of stems and roots, dry weight percentage, total photosynthetic pigments content, and total terpenoids were measured. Fresh and dry weight and the percentage of dry weight of stem did not show sensitivity to the treatments and pretreatments, and the effects were not significant. NAA treatment had the most positive effect on root fresh and dry weight, although the percentage of root dry weight was not significantly affected by the treatments. The highest significant increase in terpenoid content was observed in NAA treatment and NAA and IBA pretreatments. GA treatment had the most positive effects on the content of chlorophylls a, b, total and carotenoid content. In terms of effects on photosynthetic antenna composition, the most positive effects on the ratio of total chlorophyll to carotenoids were observed in GA, NAA, IAA treatments and IAA pretreatment. IAA treatment also showed a significant increase in chlorophyll a to b ratio. The correlation between growth parameters with each other and also the correlation of chlorophyll content with each other and with carotenoids were positive and significant. However, the correlation of terpenoid content with none of the other traits was significant. On the other hand and from an application point of view, based on gas chromatography-mass spectrometry measurements, naphthalene-acetic-acid treatment was effective in severely increasing the content of valuable medicinal compound, bis-2-ethylhexyl phthalate, compared to the control. [ABSTRACT FROM AUTHOR]