Počet záznamů: 1

The effect of enhanced nitrogen on aboveground biomass allocation and nutrient resorption in the fern Athyrium distentifolium

  1. 1.
    0342877 - UEK-B 2011 RIV NL eng J - Článek v odborném periodiku
    Holub, Petr - Tůma, Ivan
    The effect of enhanced nitrogen on aboveground biomass allocation and nutrient resorption in the fern Athyrium distentifolium.
    Plant Ecology. Roč. 207, č. 2 (2010), s. 373-380 ISSN 1385-0237
    Grant CEP: GA AV ČR IAA600050616
    Výzkumný záměr: CEZ:AV0Z60870520; CEZ:AV0Z60050516
    Klíčová slova: Fern ecology * Fertilization * Nutrient resorption * Nitrogen * Phosphorus
    Kód oboru RIV: ED - Fyziologie
    Impakt faktor: 1.880, rok: 2010

    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. A.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efficient than N resorption (on average 50% P, 21% N from supporting and 44% P, 24% N from photosynthetic tissues were withdrawn during senescence). The N/P-ratios were higher in photosynthetic tissue in comparison with supporting tissue. 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.
    Trvalý link: http://hdl.handle.net/11104/0185489