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Updated: May 22, 2026

Imaging and Analysis for Quantifying Maize (Zea mays) Abiotic Stress Phenotypes
Published on: March 28, 2025
A maize stress-responsive NAC transcription factor, ZmSNAC1, confers enhanced tolerance to dehydration in transgenic
Min Lu1, Sheng Ying, Deng-Feng Zhang
1Institute of Crop Science, Chinese Academy of Agricultural Sciences, The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Beijing, 100081, China.
Unlabelled:
NAC proteins are plant-specific transcription factors that play essential roles in stress responses. However, only little information regarding stress-related NAC genes is available in maize. In this study, a maize NAC gene, ZmSNAC1, was cloned and functionally characterized. Expression analysis revealed that ZmSNAC1 was strongly induced by low temperature, high-salinity, drought stress, and abscisic acid (ABA) treatment, but downregulated by salicylic acid treatment. Subcellular localization experiments in Arabidopsis protoplast cells indicated that ZmSNAC1 was localized in the nucleus. Transactivation assays demonstrated that ZmSNAC1 functioned as a transcriptional activator. Overexpression of ZmSNAC1 in Arabidopsis led to hypersensitivity to ABA and osmotic stress at the germination stage, but enhanced tolerance to dehydration compared to wild-type seedlings. These results suggest that ZmSNAC1 functions as a stress-responsive transcription factor in positive modulation of abiotic stress tolerance, and may have applications in the engineering of drought-tolerant crops.
Key Message:
ZmSNAC1 functioned as a stress-responsive transcription factor in response to abiotic stresses, and might be useful for crop tolerance improvement.
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Transcription
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
