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  4. Phospholipases and Galactolipases Trigger Oxylipin-Mediated Wound-Activated Defence in the Red Alga Gracilaria chilensis against Epiphytes
 
research article

Phospholipases and Galactolipases Trigger Oxylipin-Mediated Wound-Activated Defence in the Red Alga Gracilaria chilensis against Epiphytes

Lion, U.
•
Wiesemeier, T.  
•
Weinberger, F.
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2006
ChemBioChem

We investigated the wound response of the commercially important red alga, Gracilaria chilensis, in order to obtain insight into its interaction with epiphytic pests. After wounding, the host releases free fatty acids as well as the hydroxylated eicosanoids, 8R-hydroxy eicosatetraenoic acid (8-HETE) and 7S,8R-dihydroxy eicosatetraenoic acid (7,8-di-HETE). While the release of free arachidonic acid and subsequent formation of 8-HETE is controlled by phospholipase A, 7,8-di-HETE production is independent of this lipase. This dihydroxylated fatty acid might be directly released from galactolipids. Physiologically relevant concentrations of oxylipins reduced spore settlement of Acrochaetium sp. (Rhodophyta, Acrochaetiaceae) and suppressed the development of hapteria in Ceramium rubrum (Rhodophyta, Ceramiaceae) when these model epiphytes were exposed to artificial surfaces that contained 8-HETE or 7,8-di-HETE. Thus, the immediate release of oxylipins can be seen as G. chilensis defence against epiphytes. ChemBioChem 2006, 7, 457 – 462 C 2006 Wiley-VCH Verlag GmbH& Co. KGaA, Weinheim 457

  • Details
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Type
research article
DOI
10.1002/cbic.200500365
Web of Science ID

WOS:000235930800010

Author(s)
Lion, U.
Wiesemeier, T.  
Weinberger, F.
Beltran, J.
Flores, V.
Faugeron, S.
Correa, J.
Pohnert, G.  
Date Issued

2006

Published in
ChemBioChem
Volume

7

Start page

457

End page

462

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LECH  
Available on Infoscience
March 17, 2006
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/228849
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