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https://hdl.handle.net/20.500.14279/12952
Title: | Effects of Ascophyllum nodosum seaweed extracts on lettuce growth, physiology and fresh-cut salad storage under potassium deficiency |
Authors: | Chrysargyris, Antonios Xylia, Panayiota Anastasiou, Myria Pantelides, Iakovos S Tzortzakis, Nikos G. |
Major Field of Science: | Agricultural Sciences |
Field Category: | Agriculture Forestry and Fisheries |
Keywords: | Antioxidant capacity;Biostimulants;Fresh-cut salads;Lettuce;Seaweed;Shelf life |
Issue Date: | Dec-2018 |
Source: | Journal of the Science of Food and Agriculture, 2018, vol. 98, no.15, pp. 5861-5872 |
Volume: | 98 |
Issue: | 15 |
Start page: | 5861 |
End page: | 5872 |
Journal: | Journal of the Science of Food and Agriculture |
Abstract: | BACKGROUND: Potassium (K) deficiency in leafy vegetables such as lettuce is a major concern regarding quality. Seaweed (SW) extracts, as biostimulants, are biodegradable materials and have become increasingly popular as they are reported to enhance crop growth and yield. RESULTS: In order to overcome K deficiencies (i.e. 375 vs 125 mg L−1), alternative foliar applications with extracts of Ascophyllum nodosum SW or K were examined using lettuce plants which were grown hydroponically. Potassium deficiency (at 125 mg L−1) reduced plant biomass, photosynthetic rate, leaf stomatal conductance, lettuce potassium content and tissue antioxidant capacity as compared with the higher K level (375 mg L−1). Application of SW increased the relative growth of lettuce in the low-K treatment. The K level and/or SW application altered the plant's enzyme protective activity (superoxide dismutase, SOD; catalase, CAT; peroxidase, POD) against oxidative stress and hydrogen peroxide (H2O2) production. Spray applications of SW mitigated the effects of K deficiency on indicators of enzyme activity and plant damage, back to levels of high K content (375 mg L−1). The high K level, but also SW application, increased the antioxidant activity of the processed lettuce before storage. Foliar application of the SW extract increased the quality of cut lettuce grown in 125 mg L−1 K conditions by reducing the rate of respiration and increasing consumer preference. CONCLUSION: The SW application could alter the detrimental effects of K deficiency during lettuce growth and storage of processed products. © 2018 Society of Chemical Industry. |
ISSN: | 00225142 |
DOI: | 10.1002/jsfa.9139 |
Rights: | © Society of Chemical Industry |
Type: | Article |
Affiliation : | Cyprus University of Technology |
Publication Type: | Peer Reviewed |
Appears in Collections: | Άρθρα/Articles |
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