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RNA levels of MIKC* genes in mature pollen of wrky34 mutants and wild-type (WT) plants. MIKC* RNA expression was determined in RNA extracted from mature pollen after treatment with 4 °C for 24 h or 48 h. Error bars indicate standard deviations from three independent RNA extracts. Differences between the untreated and cold-stressed plants were significant at P <0.01 (**).
