Shoot nitrate reductase activities of field‐layer species in different forest types
作者:
Peter Högberg,
Christian Johannisson,
Henrik Nicklasson,
Lars Högbom,
期刊:
Scandinavian Journal of Forest Research
(Taylor Available online 1990)
卷期:
Volume 5,
issue 1-4
页码: 449-456
ISSN:0282-7581
年代: 1990
DOI:10.1080/02827589009382627
出版商: Taylor & Francis Group
关键词: field‐layer species;forest types;nitrate;nitrate reductase activity;soil pH
数据来源: Taylor
摘要:
Analysis of the activity of the substrate‐induced enzyme nitrate reductase in plants can be used to indicate the mode of nitrogen nutrition and the presence of nitrate in the soil. We made two surveys of current and maximally induced shoot nitrate reductase activities (NRA) in different forest types. Dwarf shrubs had little or no NRA.Deschampsia flexuosais, however, a species which can be common in dwarf shrub types and which is capable of high NRA. In short herb types most species had low current NRA and reacted only slightly on induction. This was the case also for some species in tall herb types, while others had high current and maximally induced NRA. Soil analyses showed that the presence of plants with high current NRA coincided with low C/N ratio, high N concentration and relatively high pH. This was most clearly demonstrated along a sharp forest productivity gradient.
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