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<p>The study determined that oligochitosan (OCS) effectiveness is strictly dependent on its molecular weight (Mw). A Mw of 4.45&#xa0;kDa was found to be optimal, producing 8.33 shoots per explant more than double the control group (without OCS). Concentrations of 15–20&#xa0;mg/L OCS yielded the best results for shoot height and biomass. In the rooting stage, the combination of 15&#xa0;mg/L OCS and 4&#xa0;mg/L IBA achieved a 90.67% rooting rate. Crucially, OCS reduced abnormal phenomena; while control plantlets formed callus at the root, OCS-treated plants developed roots directly from the stem base with lateral root systems, which is essential for survival in the greenhouse. In addition, OCS as a biological elicitor, treated-plantlets showed significantly higher activities of antioxidant enzymes like SOD and CAT, as well as increased phenolic content. This internal strengthening translated to a 96% survival rate during greenhouse acclimatization, compared to only 84% in the control. Furthermore, the medicinal value of the artichoke was enhanced. Plants treated with OCS during the in vitro stage accumulated 512.45&#xa0;µg/g of cynarin - the primary bioactive compound in artichokes - compared to only 330.15&#xa0;µg/g in untreated plants.</p>

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Oligochitosan enhanced shoot multiplication, plantlet quality and cynarin content of artichoke (Cynara scolymus L.)

  • 期刊论文

  • 发表日期：

    2026年4月20日

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  • Le Van Thuc,
  • Hoang Thanh Tung,
  • Nguyen Thị Nhu Mai,
  • Vu Quoc Luan,
  • Do Manh Cuong,
  • Hoang Hai Dang,
  • Le Thi Thuy Linh,
  • Han Huynh Dien,
  • Le Thị Bich Thy,
  • Pham Thi Thanh Van,
  • Le Xuan Cuong,
  • Nguyen Quoc Hien,
  • Nguyen Van Binh,
  • Duong Tan Nhut

摘要

The study determined that oligochitosan (OCS) effectiveness is strictly dependent on its molecular weight (Mw). A Mw of 4.45 kDa was found to be optimal, producing 8.33 shoots per explant more than double the control group (without OCS). Concentrations of 15–20 mg/L OCS yielded the best results for shoot height and biomass. In the rooting stage, the combination of 15 mg/L OCS and 4 mg/L IBA achieved a 90.67% rooting rate. Crucially, OCS reduced abnormal phenomena; while control plantlets formed callus at the root, OCS-treated plants developed roots directly from the stem base with lateral root systems, which is essential for survival in the greenhouse. In addition, OCS as a biological elicitor, treated-plantlets showed significantly higher activities of antioxidant enzymes like SOD and CAT, as well as increased phenolic content. This internal strengthening translated to a 96% survival rate during greenhouse acclimatization, compared to only 84% in the control. Furthermore, the medicinal value of the artichoke was enhanced. Plants treated with OCS during the in vitro stage accumulated 512.45 µg/g of cynarin - the primary bioactive compound in artichokes - compared to only 330.15 µg/g in untreated plants.