Báo cáo lâm nghiệp: "Nodulation in vitro et étapes précoces de l’infection rhizobienne chez Acacia albida (syn Faidherbia albida)" ppt

... 82–88 in Růžová hora the average decrease was 0.70 g, in Sněžka 0.81 g (Fig. 5). Changes in the parameters within the years 2004–2006 Data on mycorrhizal status of roots obtained from spring ... approximately in the same distance (about 1 m) from the stem of five selected trees. e cylinder of the soil probe used for this purpose had the inner diameter of...

Ngày tải lên: 07/08/2014, 03:22

... remarkable increase in wood density along the stem radius in all the models. In the CW zone, the increase is more distinct in the first 40 years of growth, then the wood density stagnates. In the other ... trend when density increases with the increasing percentage of compression wood in the sample. When there is 10% of compression wood i...

Ngày tải lên: 07/08/2014, 03:22

... 228/29042004. Changes in Austrian pine forest floor properties in relation with altitude in mountainous areas O. S, H. B. T Department of Soil Science and Ecology, Faculty of Forestry, Istanbul ... the initial mass was still remaining after 2 years for pine. Besides V and C (2001) recorded that in boreal forests where cold climatic conditions prev...

Ngày tải lên: 07/08/2014, 03:22

... 2/0045/08, and by the Slovak Research and Development Agency, Contract No. APVV-0102-06. Changes in air quality in different phases of forest management process in a sub-mountain beech ecosystem (West ... ecosystem (West Carpathian Mts.) D. K Institute of Forest Ecology, Slovak Academy of Sciences, Zvolen, Slovakia ABSTRACT: We studied ai...

Ngày tải lên: 07/08/2014, 03:22

... concentrations during defence response in Nor- way spruce embryogenic cell suspension cultures induced by intracellular protein and wall prepara- tions from Sirococcus strobilinus mycelia. MATERIAL AND METHODS Plant ... embryo- genic cultures of Norway spruce (C) and in the cells elicited by mycelium protein fraction (PF) and mycelium wall frac- tion (W...

Ngày tải lên: 07/08/2014, 10:21

... males. In the years of heavy swarming (2005 and 2008) we saw a difference between males and females in the time of swarming; the swarming of females cul- minated at the time when the swarming of ... fluctua- tions in the intensity of swarming were due to low evening and night temperatures (rain). During the entire period of swarming the males outnumbered th...

Ngày tải lên: 07/08/2014, 10:21

... content in the biomass on the thinned plot represented 8 9–9 2% of the values calculated for the control plot without thinning. On the basis of presented research, which was done within the blue spruce ... years, the investigated substitute blue spruce stand accumulated: N – 336 kg, P – 28 kg, K – 138 kg, Ca – 159 kg, Mg – 28 kg per...

Ngày tải lên: 07/08/2014, 10:21

... problem, for instance comparing Norway spruce (Picea abies [L.] Karst.) and European beech (Fagus sylvatica L.; S 2002), Norway spruce, Scots pine (Pinus sylvestris L.) and European beech (F ... E., 2007. Variation in fine root biomass of three European tree species: beech (Fagus sylvatica L.), Norway spruce (Picea...

Ngày tải lên: 07/08/2014, 10:22

... plot basal area under cork; g max : maximum basal area under cork; g dom : domi- nant basal area under cork; apb: area proportional to tree basal area; BAL: mean basal area of the trees larger than ith ... variance associated with increasing classes of canopy cover, basal area and mean squared diam- eter and decreasing classes of stand density. This indicates that within plot tree variabil...

Ngày tải lên: 07/08/2014, 16:20

... three ecological zones: a small valley, a plateau and a regular intermediate slope. The plateau is covered by a well drained soil and composed of sand and slit. The small valley is characterized ... compounds in a mixed oak stand: strong species and spatial differentiation in whisky-lactone content Andrei P a ,AlexisD b ,RémyJ.P b , Géra...

Ngày tải lên: 07/08/2014, 16:20

... Oxford. Article original Nodulation in vitro et étapes précoces de l’infection rhizobienne chez Acacia albida (Del) (syn Faidherbia albida) YK Gassama/Dia Département de biologie végétale, ... l’étude des stades précoces de l’infection rhizobienne, des prélèvements de racines infectées ont été effectués 10 puis 15 j après l’inoculat...

Ngày tải lên: 08/08/2014, 18:21

... importants en exposition Sud (B 1 2 2) avec une notation moyenne de 84. La pourriture du cœur de l’Epicéa, Picea abies (L.) Karst. en Auvergne. Etude écologique E. BENIZRY Labora G. ... unteindischen Eintrittspforten der wichtigsten Rotfân- kerreger hei der Fichte (Picea abies) . Forstwiss. Cbl. 88, 281-308. E VERS F.H., 1...

Ngày tải lên: 09/08/2014, 02:20

... data concerning ethylene biosynthesis indicate that, upon transfer to a rooting medium containing 5 !M IBA, ethylene production was of the order of 2.2 pmol/shoot/h. Finally, ... rooting process, probably in the stages of active cell division. In fact, increases in intracel- lular PUT and SPD levels preceded root protrusion and may have c...

Ngày tải lên: 09/08/2014, 04:20

... Comportement in vitro d’embryons zygotiques de chêne liège (Quercus suber L.) excisés à divers stades de leur développement M. El Maâtaoui H. Espagnac Laboratoire de Biologie ... culture d’embryons zygotiques de chêne liège, excisés plus ou moins précocement. Nous avons en effet, dans un précédent travail (El Maâtaoui et Espa-...

Ngày tải lên: 09/08/2014, 04:20

... myo-inositol (100 mg/]) et de 0,1 mgll d’acide nicotinique, de pyridoxine, de thiamine, de pantothenate de Calcium, de L-Cystéine. Les milieux sont solidifiés à l’aide du ... se demander si les racines, sièges de la synthèse de cytokinines, sont réellement fonctionnelles lorsqu’elles sont formées in vitro. Seule une éude plus fine de...

Ngày tải lên: 09/08/2014, 06:21