NDLI: Glucuronan and oligoglucuronans isolated from green algae activate natural defense responses in apple fruit and reduce postharvest blue and gray mold decay

Content Provider	Springer Nature Link
Author	Abouraïcha, El Faïza El Alaoui Talibi, Zainab Tadlaoui Ouafi, Ahmed El Boutachfaiti, Redouan Petit, Emmanuel Douira, Allal Courtois, Bernard Courtois, Josiane El Modafar, Cherkaoui
Copyright Year	2016
Abstract	The efficacy of two algal saccharides, glucuronan and oligoglucuronans (average degree of polymerization = 3), against postharvest blue mold (Penicillium expansum) and gray mold (Botrytis cinerea) on apple fruit (Malus domestica Borkh. cv Golden Delicious) and the related-defense responses involved were evaluated. The severity of both blue and gray mold in apple fruits was reduced with the greatest efficacy being achieved using oligoglucuronans. Moreover, glucuronan and its oligomers trigger a rapid and transient accumulation of hydrogen peroxide (H$_{2}$O$_{2}$) as well as the activation of antioxidant-related enzymes, namely catalase (CAT) and superoxide dismutase (SOD). These algal saccharides increased also the activities of phenylalanine ammonialyase (PAL), peroxydase (POD), and polyphenoloxydase (PPO) as well as the levels of lignin and phenolic compounds. These results suggest that the protective effects of glucuronan and oligoglucuronans on apple might be due to its ability on activating an onset-related defensive enzymes and metabolites instead of its direct antifungal activity on the pathogens. These findings showed that glucuronan and even more oligoglucuronans treatments could be a promising method to reduce dependency on synthetic fungicides.
Starting Page	471
Ending Page	480
Page Count	10
File Format	PDF
ISSN	09218971
Journal	Journal of Applied Phycology
Volume Number	29
Issue Number	1
e-ISSN	15735176
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-08-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bioelicitors Glucuronan Oligoglucuronans Ulva lactuca Apple fruit Natural defenses Plant Sciences Freshwater & Marine Ecology Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Aquatic Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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