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Título

Microbial colonization in the seagrass Posidonia spp. roots

Autor García-Martínez, Micaela ; Kuo, John; Kilminster, Kieryn; Walker, Diana I.; Rosselló-Mora, Ramón ; Duarte, Carlos M.
Fecha de publicación 2005
EditorTaylor & Francis
Citación Marine Biology Research 1(6): 388-395 (2005)
ResumenThe pattern of colonization by microorganisms on root surfaces from three species of seagrass belonging to the genus Posidonia was assessed. Microbial abundance on roots was measured by two electronic microscope techniques. Trends in microbial colonization between species and root order were defined. In addition, eutrophication status of the sampling sites and physiological status of Posidonia oceanica (L.) Delile roots have been taken into account. Our results show high microbial abundance in the Mediterranean species P. oceanica, in comparison with the low rates of colonization found in the Australian species P. australis Hook f. and P. sinuosa Cambridge et Kuo. Microbial density tended to decrease as root order increased, and living roots always showed higher microbial abundance than dead ones. Colonization of P. oceanica roots at the three sites with different environmental status follows different trends according to root order. It is suggested that root age influences the rate of microbial colonization of seagrass roots and that colonization of root surface by microorganisms is associated with organic exudates from the roots rather than with decaying root tissues. © 2005 Taylor & Francis.
URI http://hdl.handle.net/10261/89675
DOI10.1080/17451000500443419
Identificadoresdoi: 10.1080/17451000500443419
issn: 1745-1000
Aparece en las colecciones: (IMEDEA) Artículos
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