Impact of Irrigation Thresholds on Total Anthocyanin Content in Cranberries
2015
Pelletier, Vincent | Caron, Emmanuelle | Caron, Jean | Gallichand, Jacques | Vanderleest, Clay
The impact of irrigation thresholds based on soil water potentials on total anthocyanin content (TAcy) of cranberry fruit was studied at two sites. Two methods based on spectrophotometric measurements were compared: the acidic solvent extraction (ASE) method and the pH-differential method. TAcy was greater by 21–29 percent when irrigation was managed using a wetter threshold, −5.5 and −6.0 kPa, in comparison with a drier threshold, from −6.5 to −10.0 kPa. The pH-differential method resulted in significantly greater TAcy measurements than the ASE method, although the ASE method was faster and simpler to use.
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