Peanut (Arachis hypogaea L.) hairy roots are a potential tool for stilbene compound production. This study focuses on the most e cient elicitation strategy for inducing stilbene compound production, especially for the prenylated forms of trans-arachidin-1 and trans-arachidin-3. To the best of our knowledge, this is the rst report of simultaneous treatment involving chitosan (CHT), methyl jasmonate (MeJA), and cyclodextrin (CD); CHT+MeJA+CD in peanut hairy roots to induce substantial amounts of trans-arachidin-1 and trans-arachidin-3 at 72 h of the elicitation period. The results demonstrate the highest amounts of trans-arachidin-1 and trans-arachidin-3, with 684.30 ± 183.85 and 543.94 ± 171.17 mg/g dry weight of hairy roots, respectively. The highest antioxidant capacity determined by ABTS and FRAP assays was 188.95 ± 0.43 µmol Trolox/g dry weight of hairy roots and 24.61 ± 0.50 mg ascorbic acid/g dry weight of hairy roots, respectively, while the highest phenolic content was also detected in this crude extract, with 8.67 ± 0.11 mg gallic acid/g dry weight of hairy roots. The antioxidant and pro-oxidant activity of the CHT+MeJA+CD crude extract in the protection and damage of DNA is of great interest and can have major positive impacts on health promotion and disease prevention.
Key MessageChitosan, methyl jasmonate, and cyclodextrin induce high stilbene compounds. The antioxidant in crude extract could scavenge free radicals and protect DNA, while pro-oxidant activity causes severe damage to genomic DNA.
Peanut (Arachis hypogaea L.) hairy roots are a potential tool for stilbene compound production. This study focuses on the most efficient elicitation strategy for inducing stilbene compound production, especially for the prenylated forms of trans-arachidin-1 and trans-arachidin-3. To the best of our knowledge, this is the first report of simultaneous treatment involving chitosan (CHT), methyl jasmonate (MeJA), and cyclodextrin (CD); CHT+MeJA+CD in peanut hairy roots to induce substantial amounts of trans-arachidin-1 and trans-arachidin-3 at 72 h of the elicitation period. The results demonstrate the highest amounts of trans-arachidin-1 and trans-arachidin-3, with 684.30 ± 183.85 and 543.94 ± 171.17 mg/g dry weight of hairy roots, respectively. The highest antioxidant capacity determined by ABTS and FRAP assays was 188.95 ± 0.43 µmol Trolox/g dry weight of hairy roots and 24.61 ± 0.50 mg ascorbic acid/g dry weight of hairy roots, respectively, while the highest phenolic content was also detected in this crude extract, with 8.67 ± 0.11 mg gallic acid/g dry weight of hairy roots. The antioxidant and pro-oxidant activity of the CHT+MeJA+CD crude extract in the protection and damage of DNA is of great interest and can have major positive impacts on health promotion and disease prevention.
Trans-resveratrol (RES), trans-arachidin-1 (Ara-1), and trans-arachidin-3 (Ara-3) are major stilbene compounds found in elicited peanut hairy root culture and exert diverse potential biological and pharmaceutical activities. The aim of this study was to investigate the various approaches for enhancing the productivity of prenylated stilbene. The fast-growing peanut hairy root K2-K599-C line was elicited with chitosan (CHT), methyl jasmonate (MeJA), and cyclodextrin (CD) (CHT+MeJA+CD) as combined elicitors together with phenylalanine (Phe) as a precursor to feeding at 24, 48, and 72 h. The accumulation of stilbene compounds was investigated in this study as well as stilbene biosynthesis-related genes and plant defense gene expression. Upon an exogenous supply of Phe, elevated amounts of Ara-1 and Ara-3 were detected through the entire 72 h elicitation period while the non-Phe precursor feeding conditions exhibited an increasing amount of Ara-1 and Ara-3 up to 48 h, decreasing at 72 h. In addition, Phe precursor may serve as an early regulator of gene expression for the stilbene biosynthesis pathway, transcription factors, and pathogenesis-related proteins while a delayed response in transcriptional regulation was observed in the elicitation without Phe precursor feeding. Cellulase-assisted extraction was performed prior to solvent extraction of the culture medium. The results indicated a significant 1.73-fold and 1.57-fold increase in Ara-1 and Ara-3, respectively, compared to the non-cellulase-assisted process. To the best of our knowledge, this is the first study to propose an integrated approach to improving stilbene compound production in peanut hairy root culture.
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