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<p>The studies were conducted over two wet seasons in 2023 and 2024 to elucidate the antixenosis resistance and role of histological traits among seven <i>Oryza nivara</i> accessions conferring resistance to the whitebacked planthopper (WBPH). The <i>O. nivara</i> accessions evaluated included CR100318A, CR100327, IR104840, IR105409, IR82980, IR105808, and IR100916, with TN1 and Ptb33 (from <i>O. sativa</i>) serving as the susceptible and resistant checks, respectively. Among them, CR100327 and IR104840 were least preferred by WBPH nymphs and adults for settlement, a response associated with elevated trichome density and increased silica cell count. Additionally, accessions CR100327 and CR100318A showed the greatest number of probing and feeding marks, along with significantly reduced WBPH fecundity. These responses were attributed to the combined influence of high trichome density (notably in CR100327 and IR104840) and tightly compact vascular bundles (in CR100327 and CR100318A). A statistically significant correlation was observed between WBPH settling, feeding, and oviposition, and the histological traits such as trichome density and vascular bundle compactness.</p>

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Annotation of antixenosis resistance in Oryza nivara against Sogatella furcifera (Horvath) and role of various histological traits in defense

  • 期刊论文

  • 发表日期：

    2026年1月14日

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  • Palak Gandhi,
  • Preetinder Singh Sarao,
  • Dharminder Bhatia,
  • Neelam Kumari

摘要

The studies were conducted over two wet seasons in 2023 and 2024 to elucidate the antixenosis resistance and role of histological traits among seven Oryza nivara accessions conferring resistance to the whitebacked planthopper (WBPH). The O. nivara accessions evaluated included CR100318A, CR100327, IR104840, IR105409, IR82980, IR105808, and IR100916, with TN1 and Ptb33 (from O. sativa) serving as the susceptible and resistant checks, respectively. Among them, CR100327 and IR104840 were least preferred by WBPH nymphs and adults for settlement, a response associated with elevated trichome density and increased silica cell count. Additionally, accessions CR100327 and CR100318A showed the greatest number of probing and feeding marks, along with significantly reduced WBPH fecundity. These responses were attributed to the combined influence of high trichome density (notably in CR100327 and IR104840) and tightly compact vascular bundles (in CR100327 and CR100318A). A statistically significant correlation was observed between WBPH settling, feeding, and oviposition, and the histological traits such as trichome density and vascular bundle compactness.