Abstract
The plant alcohol dehydrogenase (ADH) is essential for the conversion of aldehydes to alcohols, and plays a vital role in the regulation of six-carbon (C6) volatile production. By searching the entire-grape genome, we verified 11 candidate ADH genes, including eight new sequences. During fruit storage, transcriptional patterns of the grape ADH genes differed in response to abscisic acid (ABA) treatment. Out of these 11 genes, 3 ADH genes (VvADH2, VvADH04 and VvADH06) were induced by ABA treatment, resulting in the accumulation of C6 volatiles. ABA treatment significantly promoted the accumulation of endogenous ABA and expressions of ABA synthesis genes (VvNCED1, VvCYP7O7A1, and VvPYL8). These findings showed ABA was associated with C6 volatile synthesis and related ADH gene expression of table grape fruits during postharvest storage.
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