Affinity chromatography of a lectin from Robinia pseudoacacia L. and demonstration of lectins in sieve-tube sap from other tree species

Planta ◽  
1979 ◽  
Vol 144 (4) ◽  
pp. 367-371 ◽  
Author(s):  
Christine Gietl ◽  
Heinrich Kauss ◽  
Hubert Ziegler
2019 ◽  
pp. 195-202
Author(s):  
Serhii Razanov ◽  
Volodymyr Nedashkivskyi

The intensity of damaging the nectar and pollen trees of forest lands, parks and woods in the conditions of Vinnytsia region has been studied. It has been found that in the zones of the highest local overspreading of Viscum album L. on the nectar and pollen trees, the following sequence of their damage is observed, in particular, in the conditions of forest lands: Tilia cordata L.-Tilia platyphyllos L. -Acer platanoides L.- Acer tataricum L.; in the parks: Acer platanoides L.- Acer tataricum L.- Tilia cordata L.- Acer campestre L.- Tilia platyphyllos L. - Robinia pseudoacacia L.; in the woods: Robinia pseudoacacia L. - Tilia platyphyllos L. - Acer tataricum L. It depended both on the composition of the nectar and pollen trees and their number in the area of distribution of the parasite. It was found that the level of damage to the nectar-dust-bearing trees of forest lands, parks and forest strips was respectively within 11.7% - 34.6%, 28.5% - 85.5% and 38.4% - 84.8%. Characterizing the intensity of distribution of white mistletoe within the forest lands, it should be noted that damage to the Tilia cordata L. – 34,6%, Tilia platyphyllos L. – 23,5%, Acer platanoides L. and Acer tataricum L.– 25,0% and 11,7% . In the conditions of park plantations, damage to Viscum album L.: Tilia cordta– 51,6%, Tilia platyphyllos L. – 52,9%, Viscum album L. – 28,5%, Acer platanoides L. – 85,5%, Acer campestre L. – 71,4% and Acer tataricum L.– 63,6%. Analysis of the intensity of Viscum album L. distribution on the nectar-pollen-bearing trees of the forest area under the highways showed that this parasite was damaged: Tilia platyphyllos L. – 38,4%, Viscum album L. – 84%, Acer campestre L. – 42,8%. The intensity of damage to nectar-pollen was found to depend on the dominant tree species in the area of local Viscum album L. In the woodland, a greater proportion of the nectar-bearing trees were Tilia, in the park zones – Acer platanoides L. and in the forest strips -– Viscum album L., at the same time, and a larger percentage were observed of damaged trees in these species. The distribution of Viscum album L. depended not only on the breed of nectar-pollen-bearing trees, but also on the number of trees of a particular variety in the area of their local damage by this parasite.


2009 ◽  
Vol 15 (3) ◽  
Author(s):  
K. Rédei

The choice of the right initial spacing of stands is one of the most decisive operations of a successful afforestation. It is even more important in the case of fast growing tree species grown in plantations; it is expressed in their early phase of development and in wood quality. The results of a 5-year long experiment with four treatments will be presented in this paper. They proved the priority of an initial spacing of 1.61.0 m in the majority of quality This treatment has been proved optimal exploitation of growing space by the young trees.


Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 634
Author(s):  
Szymon Bijak ◽  
Hubert Lachowicz

Black locust (Robinia pseudoacacia L.) is a non-native tree species that occupies a remarkable area in the forests of western Poland. It is mainly cultivated for the bee-keeping purposes as well as for its high quality wood. We investigated the impact of tree age and diameter on the selected structural, physical and mechanical attributes of wood of black locust that grows in conditions of mesic oligotrophic site. We analysed 200 samples originating from 18 trees that varied with age (38, 60 and 71 years old) and diameter (thin, medium and thick specimen selected according to Hartig’s method). Individual wood properties were determined along with corresponding European or Polish standards. Structural and mechanical attributes were determined for moisture of 12%. We found significant impact of tree age on tree-ring width, latewood proportion, density, oven-dry density, basic density, share of woody substance, porosity, as well as radial, tangential, longitudinal and volumetric shrinkage, compression strength parallel to grain, static bending, coefficient of compression strength parallel to grain and coefficient of static bending. The older the trees, the higher values of individual attributes were observed. In turn, the effect of tree diameter was less profound and no significant impact of that feature was found for latewood proportion, anisotropy and almost all of the shrinkage parameters. Thin trees exhibited the lowest values of the analysed parameters, while medium ones—the highest. In general, the highest technical quality of the investigated wood can be found in the youngest trees, whose wood characterises with the properties significantly exceeding native Polish tree species such as oak or beech.


2012 ◽  
Vol 131 (5) ◽  
pp. 1619-1635 ◽  
Author(s):  
Peter Annighöfer ◽  
Inga Mölder ◽  
Stefan Zerbe ◽  
Heike Kawaletz ◽  
André Terwei ◽  
...  

2009 ◽  
Vol 2 (3) ◽  
pp. 123-133 ◽  
Author(s):  
Holger Grünewald ◽  
Christian Böhm ◽  
Ansgar Quinkenstein ◽  
Philipp Grundmann ◽  
Jörg Eberts ◽  
...  

2019 ◽  
Vol 15 (1) ◽  
pp. 47-52
Author(s):  
Károly Rédei ◽  
Zsolt Keserű ◽  
János Rásó ◽  
János Gál

Abstract Thinning experiments in black locust (Robinia pseudoacacia L.) stands have been conducted in Hungary for many years. Black locust is an economically important tree species supplying the domestic timber industry. This paper evaluates two effects of thinnings: the effect on yield and the effect on stand value. The case study has proved thinnings in black locust stands do not increase periodic total production, but do increase the stem-quality index by 11–24%.


Forests ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 410 ◽  
Author(s):  
Jessica Rebola-Lichtenberg ◽  
Peter Schall ◽  
Peter Annighöfer ◽  
Christian Ammer ◽  
Ludger Leinemann ◽  
...  

Short rotation coppices play an increasing role in providing wooden biomass for energy. Mixing fast-growing tree species in short rotation coppices may result in complementary effects and increased yield. The aim of this study was to analyze the effect on mortality of eight different poplar genotypes (Populus sp.) in mixed short rotation coppices with three different provenances of the N-fixing tree species black locust (Robinia pseudoacacia L.). Pure and mixed stands were established at two sites of contrasting fertility. Survival of poplar was assessed for each tree two times a year, for a period of three years. In the first two years, high variation in mortality was observed between the genotypes, but no significant differences between pure and mixed stands were identified. However, three years after planting, higher mortality rates were observed in the mixtures across all poplar genotypes in comparison to pure stands. The expected advantage on growth of combining an N-fixing tree with an N-demanding tree species, such as poplar, was overshadowed by the Robinia’s dominance and competitiveness.


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