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<b>Abstract</b>— <p>A comparative study of fungistatic and elicitor activity of chitosan solutions and dispersions of chitosan nanoparticles obtained by fractional precipitation at pH 5.0 (NC-5) and pH 7.0 (NC-7) from chitosan with a molecular weight of 60 kDa was carried out. Both dispersions demonstrated higher fungistatic activity against <i>Bipolaris sorokiniana</i> compared to chitosan solution. A tendency towards a greater effect of inhibition of <i>B</i>. <i>sorokiniana</i> mycelium growth was revealed for NC-5 dispersion compared to NC-7 dispersion. It was found that pretreatment of wheat plants with NC-5 and NC-7 dispersions reduced leaf infestation with dark brown spot by three and two times, respectively, compared to the control. Chitosan solution under the same conditions suppressed disease development by only 10%. The studied dispersions can be considered as the basis for effective natural antimicrobial drugs with inducing activity.</p>

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The Effect of Chitosan and Chitosan Nanoparticles on Resistance of Wheat Plants to Dark Brown Spot

  • 期刊论文

  • 发表日期：

    2026年4月16日

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  • E. V. Popova,
  • N. S. Domnina,
  • I. I. Novikova,
  • N. M. Kovalenko,
  • I. L. Krasnobaeva

摘要

Abstract—

A comparative study of fungistatic and elicitor activity of chitosan solutions and dispersions of chitosan nanoparticles obtained by fractional precipitation at pH 5.0 (NC-5) and pH 7.0 (NC-7) from chitosan with a molecular weight of 60 kDa was carried out. Both dispersions demonstrated higher fungistatic activity against Bipolaris sorokiniana compared to chitosan solution. A tendency towards a greater effect of inhibition of B. sorokiniana mycelium growth was revealed for NC-5 dispersion compared to NC-7 dispersion. It was found that pretreatment of wheat plants with NC-5 and NC-7 dispersions reduced leaf infestation with dark brown spot by three and two times, respectively, compared to the control. Chitosan solution under the same conditions suppressed disease development by only 10%. The studied dispersions can be considered as the basis for effective natural antimicrobial drugs with inducing activity.