DEGRADATIVE DISEASE IN ULVA RIGIDA (CHLOROPHYCEAE) ASSOCIATED WITH ACROCHAETE GENICULATA (CHLOROPHYCEAE)

A destructive disease affecting tank‐cultivated Ulva rigida C. Agardh. was characterized by green spots, initially located at the base of the thalli, that spread through the host thallus and gradually caused perforations of the frond. The endophytic filamentous green alga Acrochaete geniculata (Gard...

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Published in:Journal of phycology 1998-02, Vol.34 (1), p.160-166
Main Authors: Del Campo, Elena, García-Reina, Guillermo, Correa, Juan A.
Format: Article
Language:English
Subjects:
Acrochaete geniculata
disease
endophyte
infection
Marine
Ulva rigida
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Correa, Juan A.
description A destructive disease affecting tank‐cultivated Ulva rigida C. Agardh. was characterized by green spots, initially located at the base of the thalli, that spread through the host thallus and gradually caused perforations of the frond. The endophytic filamentous green alga Acrochaete geniculata (Gardner) O’Kelly was identified as the causative agent of the disease. The effects of this infection on the host varied from minor injuries to gross frond destruction. Advanced stages of infection resulted in frond wrinkling and severe tissue loss. These symptoms were caused by a primary compaction of the host cells due to a direct effect of the endophyte followed by secondary bacterial infections that became part of the degradative process initiated by the algal pathogen. Co‐cultivation of healthy and diseased fronds resulted in transfer of the infection within 2 weeks; however, attempts to infect the host in the laboratory with actively reproducing suspensions of the endophyte were unsuccessful.
doi_str_mv 10.1046/j.1529-8817.1998.340160.x
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subjects Acrochaete geniculata
disease
endophyte
infection
Marine
Ulva rigida
title DEGRADATIVE DISEASE IN ULVA RIGIDA (CHLOROPHYCEAE) ASSOCIATED WITH ACROCHAETE GENICULATA (CHLOROPHYCEAE)
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