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Research articles: Special issue "impact studies on cloned poplars" : Part I: Suitability and use of poplars as bioindicators - A new concept (ESPR 1/1997, pp. 37-45) Part II: Ozone and heavy metals from automobile catalytic converters (ESPR 3/1997, pp. 131-139) Part III: Theoretical aspects of pollutant stress (ESPR 1/1998, pp. 37-43).
MedLine Citation:
PMID:  19002626     Owner:  NLM     Status:  In-Data-Review    
Symptoms of tree damage observed in Europe and overseas are often described as premature senescence. However, our own experiments with fumigated poplars have shown that the term premature senescence is misleading if undue emphasis is placed on features common to both normal and premature senescence. Consequently, the term should be replaced by a concrete description of the stress symptom noted, e.g. premature leaf loss or premature starch degradation. Such stress symptoms are usually unspecific - just like the mechanisms of stress avoidance or stress tolerance themselves. A stress model taking account of ecological, physiological and evolutionary aspects is presented; it is shown that the different stress phases are influenced by various factors, e.g. the photosynthetic capacity of the leaves. The stress reactions displayed by fumigated poplars serve as illustrations for this model. Different species of the genusPopulus can be classified as more or less pure C-strategists. It is postulated that this group of plants, in particular, is disturbed by various stress parameters, such as air pollutants, if shoot growth or metabolite transport is impaired.
H J Ballach
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Environmental science and pollution research international     Volume:  5     ISSN:  0944-1344     ISO Abbreviation:  Environ Sci Pollut Res Int     Publication Date:  1998  
Date Detail:
Created Date:  2008-11-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9441769     Medline TA:  Environ Sci Pollut Res Int     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  37-43     Citation Subset:  -    
Botanical Institute of Johann Wolfgang Goethe-University, Siesmayerstrasse 70, D-60323, Frankfurt/Main, Germany.
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