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Medientyp:
E-Artikel
Titel:
The effect of enhanced nitrogen on aboveground biomass allocation and nutrient resorption in the fern Athyrium distentifolium
Beteiligte:
Holub, Petr;
Tůma, Ivan
Erschienen:
Springer, 2010
Erschienen in:Plant Ecology
Sprache:
Englisch
ISSN:
1385-0237;
1573-5052
Entstehung:
Anmerkungen:
Beschreibung:
<p>We measured aboveground biomass allocation and resorption of nitrogen (N) and phosphorus (P) in the fronds of a winter-deciduous fern Athyrium distentifolium in ambient and N-enhanced treatments. Studies were done in the Moravian-Silesian Beskydy Mts. (Czech Republic) during 2007 and 2008. Athyrium distentifolium formed taller fronds and petioles and allocated more biomass to supporting tissue relative to photosynthetically active leaf tissue in response to N addition. Resorption of P from green fronds was more efficient than N resorption (on average 50% P, 21% N from supporting and 44% P, 24% N from photo synthetic tissues were withdrawn during senescence). The N/P-ratios were higher in photosynthetic tissue (10.8 in 2007 and 13.0 in 2008) in comparison with supporting tissue (5.5 and 7.7, respectively). In N-enhanced treatment, a positive relationship was found between the amount of supporting tissue relative to photosynthetic tissue and resorption of nutrients from photosynthetic tissue. However, higher N availability resulted in a significant decrease of N resorption efficiency in photosynthetic tissue of A. distentifolium.</p>