Báo cáo lâm nghiệp: " Cytokinin activity in Citrus seedlings colonized by mycorrhizal fungi" doc

... increased cytokinin activity in leaves of C. jambhiri. Colonization by G. fasciculatum and G. mosseae resulted in a significant increase in seedling leaf cytokinin activity. Several cytokinins, ... Several cytokinins, including zeatin and zeatin riboside, were detected in seedling leaves. Discussion and Conclusion These results demonstrate the p...

Ngày tải lên: 09/08/2014, 04:20

... W/m 2 ). Cultures Contamination is a limiting factor in in vitro development. The best results were obtained either by sampling herbaceous shoots growing in the open air or after forcing ... par une auxine (acide indolylacétique AIA, ou acide indolbutyrique AIB 0,5 ou 1 mg/1), ou une cytokinine (isopentényladénine 2 IP à 0,5 mg/1 ou benzyla...

Ngày tải lên: 09/08/2014, 06:22

... urban trees are becoming increasingly important [8,9,31,55,65]. In China, tree ring chronologies studies started in the 1930s [34, 64]. Since then, research using tree rings has been conducted ... variation in our study. The periodic oscillation of SSN, PDO and GSATA has been recorded by tree rings of Chinese pine. SSN, PDO and GSATA have great effects on Chinese pine growth in our s...

Ngày tải lên: 07/08/2014, 16:21

... by Amthor (1991), have been sug- gested to involve changes in the intercellu- lar pH and/or in membrane properties, and more likely inhibitions of respiratory enzymes by ... treatment. Carboxylase activity of Rubisco (EC 4.1.1.39) was assayed in a coupled system (Lilley and Walker, 1974). The reaction was started by adding 0.5 mM RubP afte...

Ngày tải lên: 08/08/2014, 18:21

... dif- ferences, mainly due to the differing chlo- rophyll content of the needles, were larger in summer than in winter. The values for the ratio F690/F735 tended to increase by about ... chlorophyll content increased again. This increase was particularly strong in the 1987 needles, which in the 1st yr still had a very low chlorophyll content...

Ngày tải lên: 09/08/2014, 04:20

... traps in the Nízký Jeseník Hills, the flight activity started at the beginning of May and ended in mid-June with the peak at the end of May and beginning of June in 2005. In 2006, the flight activity ... higher. In the Nízký Jeseník Hills, the flight activity started at the beginning of May and ended in mid-June with the peak at the end of May and beginning of June in 20...

Ngày tải lên: 07/08/2014, 03:22

... the following six vari- ants: – Spruce seedlings with visible symptoms of yellow - ing needles in the soil substrate from the air-pol- lution plot Hliníky (10 seedlings) ; – Spruce seedlings with ... (3): 93–100 95 – Spruce seedlings from the tree nursery in the soil substrate from the air-pollution plot Hliníky (10 seedlings) ; – Spruce seedlings from the nursery in the soi...

Ngày tải lên: 07/08/2014, 03:22

... in Bieszczady. Both in undergrowth and in natural seedlings significant increase in the number of beech (2.0% and 14.5% respectively) can be observed, while the share of fir has decreased by ... warming resulting from the increase in the volume of carbon dioxide in the atmosphere, particularly over the last decades (F, J 1996). Following the climate anal...

Ngày tải lên: 07/08/2014, 03:22

... “chemical thinning”. Relative to the conventional mechanical thinning, this technique is far less time and resource demanding (K 1968). In the past, arboricides were applied by paint- ing or ... mortality. e elimination of blue spruce by arboricides will require partial inspection of the occurrence of I. amitinus on the stems as well as on logging residues originating from t...

Ngày tải lên: 07/08/2014, 03:22

... trans- portation in forest expanses, i.e. skidding tracks, which are basic passages established without us- ing engineering structures and drainage and have rather large longitudinal inclines, which in most ... evaluated by investigating the damage to undergrowth and soil surface caused by timber skidding and also by investigating the proc- esses of rut formation. For the first...

Ngày tải lên: 07/08/2014, 03:22