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Quantitative real-time polymerase chain reaction (PCR) analysis of grape VvSODs in response to (a) cold stress, (b) heat stress, (c) salt stress (0 h, 6 h, 12 h, and 24 h), and (d) drought stress (0 days, 2 days, 4 days, and 8 days). Transcripts were normalized to the actin gene expression. The mean ± SD of the three biological replicates is presented.
