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Sulfated Oligosaccharides Mediate the Interaction between a Marine Red Alga and Its Green Algal Pathogenic Endophyte.
Plant Cell. 1999 Sep; 11(9):1635-1650.PC

Abstract

The endophytic green alga Acrochaete operculata completely colonizes the sporophytes of the red alga Chondrus crispus; however, it does not penetrate beyond the outer cell layers of the gametophytes. Given that the life cycle phases of C. crispus differ in the sulfation pattern of their extracellular matrix carrageenans, we investigated whether carra-geenan fragments could modulate parasite virulence. lambda-Carrageenan oligosaccharides induced release of H(2)O(2), stimulated protein synthesis, increased carrageenolytic activity, and induced specific polypeptides in the pathogen, resulting in a marked increase in pathogenicity. In contrast, kappa-carrageenan oligosaccharides did not induce a marked release of H(2)O(2) from A. operculata but hindered amino acid uptake and enhanced their recognition by the host, resulting in a reduced virulence. Moreover, C. crispus life cycle phases were shown to behave differently in their response to challenge with cell-free extracts of A. operculata. Gametophytes exhibited a large burst of H(2)O(2), whereas only low levels were released from the sporophytes.

Authors+Show Affiliations

Station Biologique, Centre National de la Recherche Scientifique, Unité Mixte de Recherche CNRS/Laboratoires Goëmar S.A. (UMR 1931), BP 74, F-29682 Roscoff Cedex, France.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

10488232

Citation

Bouarab, K, et al. "Sulfated Oligosaccharides Mediate the Interaction Between a Marine Red Alga and Its Green Algal Pathogenic Endophyte." The Plant Cell, vol. 11, no. 9, 1999, pp. 1635-1650.
Bouarab K, Potin P, Correa J, et al. Sulfated Oligosaccharides Mediate the Interaction between a Marine Red Alga and Its Green Algal Pathogenic Endophyte. Plant Cell. 1999;11(9):1635-1650.
Bouarab, K., Potin, P., Correa, J., & Kloareg, B. (1999). Sulfated Oligosaccharides Mediate the Interaction between a Marine Red Alga and Its Green Algal Pathogenic Endophyte. The Plant Cell, 11(9), 1635-1650.
Bouarab K, et al. Sulfated Oligosaccharides Mediate the Interaction Between a Marine Red Alga and Its Green Algal Pathogenic Endophyte. Plant Cell. 1999;11(9):1635-1650. PubMed PMID: 10488232.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sulfated Oligosaccharides Mediate the Interaction between a Marine Red Alga and Its Green Algal Pathogenic Endophyte. AU - Bouarab,K, AU - Potin,P, AU - Correa,J, AU - Kloareg,B, PY - 1999/9/17/pubmed PY - 1999/9/17/medline PY - 1999/9/17/entrez SP - 1635 EP - 1650 JF - The Plant cell JO - Plant Cell VL - 11 IS - 9 N2 - The endophytic green alga Acrochaete operculata completely colonizes the sporophytes of the red alga Chondrus crispus; however, it does not penetrate beyond the outer cell layers of the gametophytes. Given that the life cycle phases of C. crispus differ in the sulfation pattern of their extracellular matrix carrageenans, we investigated whether carra-geenan fragments could modulate parasite virulence. lambda-Carrageenan oligosaccharides induced release of H(2)O(2), stimulated protein synthesis, increased carrageenolytic activity, and induced specific polypeptides in the pathogen, resulting in a marked increase in pathogenicity. In contrast, kappa-carrageenan oligosaccharides did not induce a marked release of H(2)O(2) from A. operculata but hindered amino acid uptake and enhanced their recognition by the host, resulting in a reduced virulence. Moreover, C. crispus life cycle phases were shown to behave differently in their response to challenge with cell-free extracts of A. operculata. Gametophytes exhibited a large burst of H(2)O(2), whereas only low levels were released from the sporophytes. SN - 1532-298X UR - https://www.unboundmedicine.com/medline/citation/10488232/Sulfated_Oligosaccharides_Mediate_the_Interaction_between_a_Marine_Red_Alga_and_Its_Green_Algal_Pathogenic_Endophyte_ L2 - http://www.plantcell.org/cgi/pmidlookup?view=long&pmid=10488232 DB - PRIME DP - Unbound Medicine ER -
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