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Related Experiment Video

Updated: May 16, 2025

Inhibition of Aspergillus flavus Growth and Aflatoxin Production in Transgenic Maize Expressing the &#945;-amylase Inhibitor from Lablab purpureus L.
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Flood-Induced Insect Resistance in Maize Involves Flavonoid-Dependent Salicylic Acid Induction.

Zachary Gorman1, Hui Liu1, Ariel Sorg1

  • 1Chemistry Research Unit, United States Department of Agriculture-Agricultural Research Service, Gainesville, Florida, USA.

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|March 31, 2025
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Summary
This summary is machine-generated.

Flavonoids are crucial for maize defense against fall armyworms under combined flooding and herbivory stress. This study reveals flavonoids

Keywords:
combined stressfall armyworm (Spodoptera frugiperda)flavonoidfloodingmaize (Zea mays)plant‐insect interactionsalicylic acid

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Area of Science:

  • Plant biology
  • Biochemistry
  • Entomology

Background:

  • Plants face biotic and abiotic stresses, sometimes triggering synergistic defenses.
  • Maize exhibits salicylic acid (SA)-dependent defense against fall armyworm (Spodoptera frugiperda) under combined flooding and herbivory.

Purpose of the Study:

  • To investigate the role of flavonoids in maize's defense response to combined flooding and herbivory.
  • To elucidate the involvement of flavonoids in salicylic acid (SA) induction.

Main Methods:

  • RNA sequencing (RNAseq) and metabolic profiling were employed.
  • Analysis of maize mutants with altered flavonoid biosynthesis (idf, pr1, a1).

Main Results:

  • Flavonoid-deficient maize mutants (idf) showed reduced resistance to fall armyworm and impaired SA accumulation under combined stress.
  • The flavonoid 3' hydroxylase mutant (pr1) exhibited enhanced SA accumulation, correlating with specific flavonoid increases.
  • The dihydroflavonol reductase mutant (a1) was unaffected in SA induction.

Conclusions:

  • Specific flavonoids are essential for inducing SA accumulation in maize under combined stress.
  • Flavonoids play a significant role in the flood-induced resistance of maize to fall armyworm herbivory.