摘要:

AbstractChestnut trees (Castanca dentata) were wounded in May and inoculated withCryphonectria parasitica. In August, canker area was measured and the surfaces of longitudinal dissections of stem wood were stained with I2KI to reveal the presence of starch. Sections with the most starch had smaller cankers than sections with no starch. Results show that starch reserves were related to canker size and therefore may play a role in the tree's ability to respond to infection.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1984.tb00154.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractA greenhouse experiment compared growth and mineral nutrition of mycorrhizal and non‐mycorrhizal seedlings ofAcer pseudoplatanuson a fumigated soil. The effects of mycorrhizal inoculation were examined at six rales of soluble phosphate and five rates of non‐soluble phosphate. Inoculation withGlomus mosseaemarkedly stimulated phosphorus uptake and growth only at the lowest level of soluble phosphorus. With 200 ppm of added monocalcium phosphate mycorrhizal infection depressed growth and considerably modified the relationships between yield and phosphorus concentration in plant tissues. The possible causes of growth depression at high level of added soluble phosphorus are discus

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1984.tb00155.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractSurvey ofEucalyptus (E, grandisandE. tereticornis) nurseriesin Kerala State indicates that the most prevalent diseases are damping‐off, web blight and seedling blight in seedbeds and stem canker, leaf and shoot blights andPhaeoseptorialeaf spot in container plants.Cylindrocladiumspp.,Rbizoctonia solaniandPythiumspp. arc the main serious pathogens.Pythium myriotylum, P. deliense, R. scilani, Cylindrocladium camellias, C. clavatumandSclerotium rolfsiiare recorded for the first time onEucalyptu

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1984.tb00156.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractFine rootstudies intwo old growth spruce forests affected by “Wadsterben” in Bavaria. Fine roots of healthy and declining Norway spruce (Picea abies) were investigated. We observed fewer active myeorrhizac associated with affected spruce in two old growth Forests. It has been hypothesised that air pollution is dimaging the needles resulting in less photosynthate and that the reduction of active mycorrhizae is due to such an initial weakening of the t

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1984.tb00157.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractWetwood taken from euramerican hybrid poplars (Populus×euramericana) generally contained large and diverse populations of bacteria. The distribution of bacteria within tissues was discontinuous in both radial and axial directions. Most of the common bacterial strains were capable of altering wood components. The bacteria most consistently associated with wetwood were identified asEnterobacterandClostridiumspecies. TheEnterobacterwas hemicllulolytic and oneClostridiumstrain could degrade pectin in anaerobic conditions. These bacteria may play an important rote in the development of wetwood in poplar

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1984.tb00158.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractThe sensitivity to lead nitrate of four chosen poplar species has been investigated.P. maximowicziiturned out to be the most sensitive, andP, nigrathe least sensitive one. Morphologically lead presence in the loaves in manifested itself with a change of colour (from green to more or less reddish‐brown)of the leaf venation and petioles and with necrosis of some parts of the blade. At the ultrastructural level lead deposits were present mainly within the vascular elements of the leave

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1984.tb00159.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractThe presencs ofArceuthobium minutissimumonPinus gerardianain the remperate forests of Dir has been confirmed. It was found in the Zander forests around Anar Killi about 105 km north‐east of Dir. This is the first verified report ofA, minutissimumon any host other thanPinus wallichian

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1984.tb00160.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractSlugs (Lchmannia marginataMüller) were observed moving and feeding on chestnut blight cankers in woods. Preliminary laboratory tests support the hypothesis that slugs are important vectors in the natural spreading of the blight, complementary to other physical and biological factors

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1984.tb00161.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

Book reviewed in this article:Schütt, P.; Koch, W.; Blaschke, H.; Lang, K. J.; Schuck, H. J.; Summerer, H.: So stirbt der Wald.Webster, John: Pilzc. Eine Einführung. Übersetzt von BerndDieterEpp. Mit tinem Geleitwort von KarlEsser. Berlin, Heidelb

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1984.tb00162.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY