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Moderate water stress prevents the postharvest decline of ascorbic acid in spinach ( Spinacia oleracea L.) but not in spinach beet ( Beta vulgaris L.)
Author(s) -
Mogren Lars M,
Beacham Andrew M,
Reade John P H,
Monaghan James M
Publication year - 2016
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.7464
Subject(s) - spinacia , spinach , ascorbic acid , postharvest , vitamin c , antioxidant , biology , phaseolus , horticulture , chenopodiaceae , botany , human nutrition , vitamin , food science , chemistry , biochemistry , chloroplast , gene
BACKGROUND Babyleaf salads such as spinach ( Spinacia oleracea L.) and spinach beet ( Beta vulgaris L. subsp. cicla var. cicla ) are an important dietary source of antioxidants such as ascorbic acid (vitamin C). Such compounds may be important in disease prevention in consumers but the level of these compounds in leaves frequently declines after harvest. As such, methods to maintain antioxidant levels in fresh produce are being sought. RESULTS Irrigation deficits were used to apply water stress to S. oleracea and B. vulgaris plants. This treatment prevented postharvest decline of leaf ascorbic acid content in S. oleracea but not in B. vulgaris . Ascorbic acid levels in leaves at harvest were unaffected by the treatment in both species compared to well‐watered controls. CONCLUSION We have shown that restricted irrigation provides a viable means to maintain leaf vitamin content after harvest in S. oleracea , an important finding for producers, retailers and consumers alike. © 2015 Society of Chemical Industry