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<p><i>Spodoptera litura</i>, commonly known as the tobacco cutworm or cotton leafworm, is a significant agricultural pest belonging to the family Noctuidae. Being polyphagous, it can feed on a wide variety of host plants and the larvae are particularly voracious feeders, causing substantial damage to crops. However, <i>Zea mays</i> (African tall variety) harbour a robust defense system and releases defensive proteins and allelochemicals that retard growth and development of <i>S. litura</i>. To identify and isolate the proteins responsive to maize allelochemicals, a comparative proteomic analysis of the mid-gut of maize-fed <i>S. litura</i> larvae was conducted. This analysis revealed the upregulation of 203 and downregulation of 376 differentially abundant proteins (DAPs). The DAPs were categorized into various functional groups, such as carbohydrate and lipid metabolism, defense, growth and development, transport, signaling, molecular processes, and digestion. The downregulation of proteins associated with digestion, detoxification, immunity and growth or development, suggests a non-adaptive mechanism against maize allelochemicals. This information can be crucial for understanding the impact of maize metabolites on insect gut and potentially exploiting it for pest management.</p>

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Translational reprogramming of Zea mays-fed larval midgut of Spodoptera litura indicates non-adaptive response

  • 期刊论文

  • 发表日期：

    2025年12月23日

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  • Archana Singh,
  • Sumit Kumar,
  • Kalpesh Nath Yajnik,
  • Sujata Singh,
  • Indrakant Kumar Singh

摘要

Spodoptera litura, commonly known as the tobacco cutworm or cotton leafworm, is a significant agricultural pest belonging to the family Noctuidae. Being polyphagous, it can feed on a wide variety of host plants and the larvae are particularly voracious feeders, causing substantial damage to crops. However, Zea mays (African tall variety) harbour a robust defense system and releases defensive proteins and allelochemicals that retard growth and development of S. litura. To identify and isolate the proteins responsive to maize allelochemicals, a comparative proteomic analysis of the mid-gut of maize-fed S. litura larvae was conducted. This analysis revealed the upregulation of 203 and downregulation of 376 differentially abundant proteins (DAPs). The DAPs were categorized into various functional groups, such as carbohydrate and lipid metabolism, defense, growth and development, transport, signaling, molecular processes, and digestion. The downregulation of proteins associated with digestion, detoxification, immunity and growth or development, suggests a non-adaptive mechanism against maize allelochemicals. This information can be crucial for understanding the impact of maize metabolites on insect gut and potentially exploiting it for pest management.