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Title: Bioactive properties of greenhouse-cultivated green beans (Phaseolus vulgaris L.) under biostimulants and water-stress effect
Authors: Petropoulos, Spyridon A. 
Taofiq, Oludemi 
Fernandes, Ângela 
Tzortzakis, Nikos G. 
Ciric, Ana 
Sokovic, Marina 
Barros, Lillian 
Ferreira, Isabel C. F. R. 
Major Field of Science: Agricultural Sciences
Field Category: Agriculture Forestry and Fisheries
Keywords: Antimicrobial properties;Biostimulants;Common bean;Cytotoxicity;Phenolic composition;Water stress
Issue Date: Oct-2019
Source: Journal of the Science of Food and Agriculture, 2019, vol. 99, no. 13, pp. 6049-6059
Volume: 99
Issue: 13
Start page: 6049
End page: 6059
Journal: Journal of the Science of Food and Agriculture 
Abstract: BACKGROUND: The scarcity of irrigation water is severely affecting global crop production. In this context, biostimulants are increasingly used as alternatives means against abiotic stress conditions. In this study, phenolic compounds composition and bioactive properties of common bean (Phaseolus vulgaris L.) plants grown under water stress conditions and biostimulants application were investigated. RESULTS: Sixteen individual phenolic compounds were detected in both pods and seeds with a notable difference in their compositional profile. A significant effect on phenolic compounds content and composition was also observed for the biostimulants tested. Regarding the antibacterial activity, pods of the second harvest and seed extracts showed significant efficacy against Bacillus cereus, especially in water-stressed plants, where all biostimulant treatments were more effective than positive controls. Moreover, all biostimulant treatments for seed extracts of water-stressed plants were more effective against Staphylococcus aureus compared with ampicillin, whereas streptomycin showed the best results. Extracts from pods of the second harvest from normally irrigated plants showed the best results against the fungi tested, except for Penicillium verrucosum var. cyclopium. Finally, no significant cytotoxic effects were detected. CONCLUSION: In conclusion, the biostimulants tested increased total phenolic compounds content compared with control treatment, especially in pods of the first harvest and seeds of water-stressed plants. Moreover, bioactive properties showed a varied response in regard to irrigation and biostimulant treatment. Therefore, biostimulants can be considered as a useful means towards increasing phenolic compounds content, and they may also affect the antimicrobial properties of pods and seeds extracts.
ISSN: 1097-0010
DOI: 10.1002/jsfa.9881
Rights: © Wiley
Attribution-NonCommercial-NoDerivs 3.0 United States
Type: Article
Affiliation : University of Thessaly 
Instituto Politécnico de Bragança 
Cyprus University of Technology 
University of Belgrade 
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