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. 2022 Jul 20;11(14):1881. doi: 10.3390/plants11141881

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The relative expression of six cold–responsive genes in leaves of two contrasting maize genotypes (M0504, a strong cold–resistant genotype; M1012, a cold–sensitive genotype) under 22 °C normal (CK) and 10 °C low temperature (LT) treatments. The genes included arginine decarboxylase 1 (ADC1), spermidine synthase 1 (SPDS1), probable polyamine oxidase 2 (PAO2), superoxide dismutase 3 (SOD3), peroxidase 72 (POD72), and catalase 1 (CAT1), respectively. Data were means of three replicates. Error bars indicated standard error (SD). The different letter indicated significant differences between two treatments within a maize genotypes (p < 0.05).