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Related Experiment Video

Updated: Oct 17, 2025

Author Spotlight: Improved Methods for Preparing Transverse Sections and Unrolled Whole Mounts of Maize Leaf Primordia for Fluorescence and Confocal Imaging

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Published on: September 22, 2023

SDG128 is involved in maize leaf inclination.

Shiliang Wang^1,2, Fei Zhang², Pengfei Jiang²

¹National Engineering Laboratory of Crop Stress Resistance/Key Laboratory of Crop Biology of Anhui Province, School of Life Sciences, Anhui Agricultural University, Hefei, 230036, China.

The Plant Journal : for Cell and Molecular Biology

|October 6, 2021

Summary

SET domain protein 128 (SDG128) and ZmGID2 regulate maize leaf angle by influencing gene transcription. Knockdown of these genes alters plant architecture and vascular bundle development, impacting leaf inclination.

Keywords:

histone methylation leaf angles vascular bundles

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Area of Science:

Plant Molecular Biology
Epigenetics
Maize Genetics

Background:

Maize leaf angle (LA) is a crucial quantitative trait influenced by various factors.
The role of histone methylation in controlling maize LA is not well understood.

Purpose of the Study:

To investigate the involvement of SET domain protein 128 (SDG128) in maize leaf inclination.
To elucidate the molecular mechanisms underlying SDG128-mediated regulation of LA.

Main Methods:

RNA interference (RNAi) was used to knock down SDG128 and ZmGID2 expression in maize.
Yeast-two-hybrid and Co-immunoprecipitation assays were performed to assess protein interactions.
Quantitative real-time PCR (qRT-PCR) was employed to analyze gene transcription levels.
Chromatin immunoprecipitation (ChIP) was used to determine H3K4me3 deposition at target genes.

Main Results:

Knockdown of SDG128 resulted in an expanded plant architecture with altered vascular bundle characteristics.
SDG128 interacts with ZmGID2, and ZmGID2 knockdown also affects LA and vascular development.
The transcription of key genes involved in cell wall expansion, transcription factors, and auxin pathways was reduced in SDG128 and ZmGID2 knockdown plants.
SDG128 directly targets specific genes and is essential for H3K4me3 modification at these loci.

Conclusions:

SDG128 and ZmGID2 play significant roles in regulating maize leaf inclination.
The study reveals a novel epigenetic mechanism involving histone methylation in controlling plant architecture.