Silica uptake in aquatic and wetland macrophytes: a strategic choice between silica, lignin and cellulose?
New Phytol
; 186(2): 385-91, 2010 Apr.
Article
en En
| MEDLINE
| ID: mdl-20136720
ABSTRACT
*Although silica (Si) is not an essential element for plant growth in the classical sense, evidence points towards its functionality for a better resistance against (a)biotic stress. Recently, it was shown that wetland vegetation has a considerable impact on silica biogeochemistry. However, detailed information on Si uptake in aquatic macrophytes is lacking. *We investigated the biogenic silica (BSi), cellulose and lignin content of 16 aquatic/wetland species along the Biebrza river (Poland) in June 2006 and 2007. The BSi data were correlated with cellulose and lignin concentrations. *Our results show that macrophytes contain significant amounts of BSi between 2 and 28 mg BSi g(-1). This is in the same order of magnitude as wetland species (especially grasses). Significant antagonistic correlations were found between lignin, cellulose and BSi content. Interestingly, observed patterns were opposite for wetland macrophytes and true aquatic macrophytes. *We conclude that macrophytes have an overlooked but potentially vast storage capacity for Si. Study of their role as temporal silica sinks along the land-ocean continuum is needed. This will further understanding of the role of ecosystems on land ocean transport of this essential nutrient.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Plantas
/
Agua
/
Celulosa
/
Dióxido de Silicio
/
Humedales
/
Lignina
País/Región como asunto:
Europa
Idioma:
En
Revista:
New Phytol
Asunto de la revista:
BOTANICA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Bélgica