摘要:

AbstractEctomycorrhizae ofPinus sylvestriswithCenococcum geophilum, Amanita muscaria, andPisolithus tinctoriuswere synthesized in substrates of different acidity (pH 3‐6). The mycorrhizae which then formed were counted respectively. Morphology and ultrastructure are described and discussed. Meristematic abortion in root tips as an indicator of acidity in the substrate is presented in brie

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1987.tb01118.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

AbstractEndophytic fungi in leaves and twigs of healthy and diseased beech trees (Fagus sylvatica L.).Endophytic fungi were isolated from surface‐sterilized leaves and twigs of healthy and diseased trees. Three fungal species could be isolated frequently:Apiognomonia errabunda, Diaporthe eresandBisporellasp.D. eresoccurred in leaves of healthy trees more frequently, than in those of diseased trees. It has been hypothesized, that less capacity of water and nutrient uptake of diseased trees is responsible for this effect. A mutualistic symbiosis ofA. errabundaandD. ereswith beech trees is supposed and discusse

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1987.tb01119.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

AbstractA procedure for the registration of the time course and degree of injury in conifer stands. Missing tree rings are detected by dendrochronological methods and systematically recorded. A procedure is described for the registration of the time course and the extent of injury in conifer stands.A highly significant correlation is demonstrated between the extent of injury in European Silver Fir and the average sulfur content in Norway Spruce needles on the basis of the bioindicator network of the Bayer. Landesamt für Umweltschutz; sulfur content in spruce needles is taken as a measure of sulfur burden of an area

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1987.tb01120.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

AbstractOccurrence of Leucocytospora kunzei on Pinus griffithii in parks of the City of Basel.Leucocytospora kunzeii(Sacc.) Urban, the causal agent of a canker disease mainly known in North America, was found onPinus griffitbiiin several public parks of Basel.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1987.tb01121.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

AbstractThe epistomatal wax crystalloids of potted spruce plants exposed for 20 weeks to motor vehicle emissions along roadside and in a fumigation chamber were studied in the scanning electron microscope. An accelerated structural degradation of the wax crystalloids was observed in comparison with control plants. This structural degradation is considered to cause a structural obstruction of the stomatal antechambers and to contribute to the observed reduction of gas exchange.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1987.tb01122.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY