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Related Experiment Video

Updated: Jun 4, 2025

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Enhanced antioxidant activity improves deep-sowing tolerance in maize.

Mingfei Sun1, Menglin Pu1, Guangming Zheng1

  • 1State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, China.

BMC Plant Biology
|December 21, 2024
PubMed
Summary

Maize inbred line DH65232 shows enhanced deep sowing tolerance due to superior antioxidant activity, leading to increased mesocotyl length. This research offers insights for developing improved maize varieties for arid conditions.

Keywords:
Antioxidant activityDeep sowingHormoneMaizeMesocotylMetabolismROS

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Area of Science:

  • Agricultural Science
  • Plant Physiology
  • Genetics

Background:

  • Deep sowing is crucial for crop establishment in arid regions, with maize mesocotyl length being a key trait for tolerance.
  • Mesocotyl elongation is regulated by light, hormones, metabolites, and reactive oxygen species (ROS).

Purpose of the Study:

  • To identify maize inbred lines with enhanced deep sowing tolerance.
  • To elucidate the molecular and physiological mechanisms underlying deep sowing tolerance in maize.

Main Methods:

  • Comparative transcriptome analysis of maize inbred lines under deep sowing conditions.
  • Hormone content measurement and phenotypic analysis with GA3 treatment.
  • Untargeted metabolomics and antioxidant enzyme activity assays (POD, CAT, SOD).

Main Results:

  • Inbred line DH65232 exhibited significantly longer mesocotyls than B73 under deep sowing.
  • Differentially expressed genes were enriched in hormone regulation, intermediate metabolism, and redox pathways.
  • DH65232 demonstrated higher antioxidant activity and ROS scavenging capacity, with GA3 promoting elongation.

Conclusions:

  • DH65232's deep sowing tolerance is attributed to its robust antioxidant system.
  • The study provides a deeper understanding of maize tolerance mechanisms to deep sowing.
  • Findings offer insights for breeding new maize varieties adapted to deep sowing environments.