What question did this study set out to answer?

To evaluate the efficacy of marine polysaccharides and their depolymerized derivatives from green and brown seaweeds in activating natural defense mechanisms in olive tree leaves.

September 2, 2022Applied SciencesOpen Access

Polysaccharides from Moroccan Green and Brown Seaweed and Their Derivatives Stimulate Natural Defenses in Olive Tree Leaves

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Authors

MAMeriem AitouguinaneInstituto Nacional de Investigación y Tecnología Agraria y Alimentaria ZAZainab El Alaoui-TalibiCadi Ayyad University HRHalima RchidChouaib Doukkali University

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Implication

Experimental study reveals seaweed polysaccharides stimulate defense enzymes and polyphenols in olive tree leaves, suggesting a sustainable bioprotection strategy against plant pathogens.

Key Points

To evaluate the efficacy of marine polysaccharides and their depolymerized derivatives from green and brown seaweeds in activating natural defense mechanisms in olive tree leaves.
Extracted alginates, depolymerized oligomers, fucoidans, and sulfated arabinogalactans from Sargassum muticum, Cystoseira myriophylloides, and Codium decorticatum.
Treated olive leaf discs with aqueous solutions of the polysaccharides at concentrations of 0.5, 1, and 2 g/L for 24 hours.
Quantified defense responses by measuring phenylalanine ammonia-lyase (PAL) and tyrosine ammonia-lyase (TAL) activities, alongside total polyphenol and lignin contents.
All polysaccharide extracts triggered defense responses in olive leaf discs, with sulfated polysaccharides demonstrating greater efficacy than unsulfated alginates and reaching peak induction at 2 g/L.
Alginates, depolymerized derivatives, and arabinogalactans stimulated significantly stronger induction of TAL activity compared to PAL activity.
Treated leaves exhibited substantial qualitative accumulation of total polyphenols and lignin structural defenses relative to untreated controls.

Cite This Study

Aitouguinane et al. (2022) studied this question.

synapsesocial.com/papers/6a9e8a5f5ba704ce3f944d2f https://doi.org/10.3390/app12178842

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Implication

Experimental study reveals seaweed polysaccharides stimulate defense enzymes and polyphenols in olive tree leaves, suggesting a sustainable bioprotection strategy against plant pathogens.

Polysaccharides from Moroccan Green and Brown Seaweed and Their Derivatives Stimulate Natural Defenses in Olive Tree Leaves

Discussion

Member takes

Implication

Key Points

Cite This Study

Polysaccharides from Moroccan Green and Brown Seaweed and Their Derivatives Stimulate Natural Defenses in Olive Tree Leaves

Discussion

Member takes

Implication

Key Points

Cite This Study

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