Nitrogen and carbohydrate pools of two rhizome types ofPhragmites australis (Cav.) Trin. ex Steudel

Autor:	Johannes-Günter Kohl, Harald Kühl, Peter Woitke, Annette Kiehl
Rok vydání:	1997
Předmět:	chemistry.chemical_element Root system Aquatic Science Biology Nitrogen Rhizome Phragmites Nutrient chemistry Aquatic plant Botany Poaceae Composition (visual arts) General Agricultural and Biological Sciences Ecology Evolution Behavior and Systematics
Zdroj:	Internationale Revue der gesamten Hydrobiologie und Hydrographie. 82:161-168
ISSN:	1522-2632 0020-9309
DOI:	10.1002/iroh.19970820204
Popis:	Carbohydrate and total nitrogen contents as well as free amino acid (FAA) concentrations were determined in distinct types of rhizomes of two genetically homogeneous stands of reed (Phragmites australis (Cav.) Trin. ex Steudel) differing in morphology, productivity and nutrient supply in order to evaluate the storage capacity of vertical rhizomes and expansion rhizomes. The expansion rhizomes possess significantly higher amounts of FAA and of total nitrogen but similar carbohydrate concentrations in comparison to the vertical rhizomes. However, no significant differences were found for total nitrogen, FAA and total carbohydrates between both investigated stands indicating a comparable storage capacity of rhizomes independent of nutrient availability. Only the composition of the FAA pool varied in the alanine/asparagine ratio probably influenced by the oxygen supply of the rhizome/root system.
Databáze:	OpenAIRE
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