scholarly journals Biotesting the edafotopes of some species of broad-leaved trees in Ashinskiy state natural biological reserve (Chelyabinsk region)

2020 ◽  
pp. 84-93
Author(s):  
Павел Владимирович Левченко ◽  
Ирина Анатольевна Гетманец ◽  
Владимир Павлович Викторов
Keyword(s):  
Seed Germination ◽  
Leaf Litter ◽  
Test Object ◽  
Quercus Robur ◽  
Allelopathic Effect ◽  
Aqueous Extracts ◽  
Acer Platanoides ◽  
Ulmus Glabra ◽  
Chelyabinsk Region ◽  
Biological Reserve

Представлены результаты изучения аллелопатической активности Quercus robur L., Acer platanoides L., Ulmus glabra Huds методом биотестирования. Выявлены различия воздействия аллелохимикатов на прорастание семян и развитие проростков тест-объекта в контролируемых условиях. Показана корреляция концентрации водных вытяжек листового опада и аллелопатического эффекта, оказываемого ими, которая подтверждена анализом функции средней. Here we present the results of studying the allelopathic activity of Quercus robur L., Acer platanoides L., Ulmus glabra Huds by biotesting. We revealed differences in the effect of allelochemicals on seed germination and the development of seedlings of the test object under controlled conditions. The correlation of the concentration of aqueous extracts of leaf litter and the allelopathic effect exerted by them is shown. The mentioned correlation is confirmed by the analysis of the average function.

Balsamia platyspora. [Descriptions of Fungi and Bacteria].

2007 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
Pinus Ponderosa ◽  
Quercus Robur ◽  
Conservation Status ◽  
Corylus Avellana ◽  
Moscow Oblast ◽  
Acer Platanoides ◽  
Spore Dispersal ◽  
Hedera Helix ◽  
Ilex Aquifolium ◽  
Ulmus Glabra

Abstract A description is provided for Balsamia platyspora. Some information is given on its habitat (e.g. woodland and forest soils), traditional uses and conservation status, along with details of its transmission (spore dispersal), geographical distribution (North America: USA (Oregon) and Europe: Denmark, Estonia, France, Germany, Great Britain, Hungary, Norway, Poland, Russia (Moscow oblast), Romania and Sweden) and hosts (Abutilon sp., Acer platanoides, Corylus avellana, Fagus sylvatica, Fagus sp., Hedera helix, Ilex aquifolium, Larix sp., Laurus sp., Quercus robur, Pinus ponderosa, Pseudotsuga menziesii, Tilia sp. and Ulmus glabra).

Natural regeneration of Tilia cordata in relation to forest-structure in the forest of Białowieża, Poland

1975 ◽  
Vol 270 (904) ◽  
pp. 151-179 ◽  
Keyword(s):  
Picea Abies ◽  
National Park ◽  
Quercus Robur ◽  
Tilia Cordata ◽  
Acer Platanoides ◽  
Carpinus Betulus ◽  
Wooded Area ◽  
Ulmus Glabra ◽  
History Of ◽  
Almost Continuous

The history of the forest of Bialowieza is briefly reviewed. The National Park was created in 1923 in the central and apparently least exploited part of the forest. The composition of the forest varies in relation to the nature of the soils. Almost half of the wooded area of the park is occupied by forest composed of Carpinus betulus, Tilia cordata, Quercus robur, Acer platanoides, Ulmus glabra and Picea abies (Querceto-Carpinetum). The structure of this association is illustrated by maps and transects of selected plots. An almost continuous canopy is formed by Carpinus betulus with tall emergent trees of Tilia cordata, Quercus robur and Picea abies. Tilia cordata regenerates freely and there are numerous groups of seedlings, saplings and young trees which are sometimes in gaps but often beneath the main canopy. The origin of the groups is analysed and evidence is presented that those of T. cordata are probably always less than 50 years old. This is in contrast to analyses made by Paczoski (1928a, b, 1930) shortly after the park was established, when trees of T. cordata with trunk diameters less than 0.3-0.4 m were absent. There is now a discontinuity in the distribution of diameter classes in the population. The influence of this change on the structure of the forest is discussed.

scholarly journals Allelopathic effect of aqueous extracts from agro-industrial residues of pecan nut [Carya illinoinensis (Wangenh) C. Koch] and pinhão (Araucaria angustifolia)

2017 ◽  
Vol 3 (3) ◽  
pp. 495-507 ◽  
Author(s):  
Voltaire SANT'ANNA ◽  
Maico Ismael KLEIN ◽  
Elaine BIONDO ◽  
Eliane Maria KOLCHINSKI
Keyword(s):  
Seed Germination ◽  
Seed Coat ◽  
Plant Root ◽  
In Vitro Tests ◽  
Allelopathic Effect ◽  
Lettuce Seed ◽  
Aqueous Extracts ◽  
Industrial Residues ◽  
Pecan Nutshell

Pinhão seed coat and pecan nutshell are residues widely produced in households and industries, which present great potential to be used as source of natural preservatives in the food chain. The objective of the present study is to evaluate the effectiveness of pinhão seed coat and pecan nutshell aqueous extracts in inhibiting seed germination. Extracts were obtained in concentration of 10g/L, 5g/L and 2.5g/L and tested against lettuce seed germination in vitro tests. The results show that both aqueous extract presented the significant (p<0.05) ability to inhibit seeds germination as well as the germination seed index, in relation to control experiments, when used in concentrations of up to 5g/L. Extracts did not interfere significantly (p>0.05) the germinated plant root size. Thus, aqueous extracts of agro-industrial residues from pinhão seed coat and pecan nutshell presents alellopathic activity, showing up as interesting alternative to be used as natural herbicide, also representing a way of solid waste management by industries and small farmers.

scholarly journals Phytotoxicity of exotic plants on the physiological potential of seeds of native species of caatinga

2018 ◽  
Vol 12 (2) ◽  
pp. 134 ◽  
Author(s):  
Silvana Fraga Silva ◽  
Halina Stéffany Lopes Costa ◽  
Jesimiel Silva Viana ◽  
Ana Maria Oliveira Ferreira ◽  
Diego Sousa Pereira ◽  
...  
Keyword(s):  
Seed Germination ◽  
Native Species ◽  
Biodiversity Loss ◽  
Exotic Plants ◽  
Inhibitory Effect ◽  
Allelopathic Effect ◽  
Native Forest ◽  
Aqueous Extracts ◽  
Physiological Quality ◽  
Invasive Exotic

The introduction of species is one of the major causes of biodiversity loss. Invasive exotic plants adapt, propagate and dominate, damaging both natural processes and native species. Thus, the objective was to evaluate the allelopathic effect of three exotic species in the caatinga, on the physiological quality of native forest seeds. Aqueous extracts of leaves of Azadirachta indica, Prosopis juliflora and Cryptostegia madagascariensis were tested to evaluate their effect on the seed germination and seedling vigor of Piptadenia moniliformis, Mimosa tenuiflora and Mimosa caesalpiniaefolia. Seed germination of M. tenuiflora was inhibited by the aqueous extracts of P. juliflora and A. indica in 100% and 42%, respectively, with a reduced GVI with the extracts of P. juliflora and C. madagascariensis. Regarding AEI, P. juliflora extract had positive effect on P. moniliformis seeds and negative on M. tenuiflora seeds, close to -1. A reduction in height of P. moniliformis was observed when the seedlings were in contact with the extracts of the invasive plants studied. For M. tenuiflora, the extract of P. juliflora prevented the formation of seedlings, and M. caesalpiniaefolia presented higher inhibitory effect with extracts of P. juliflora and A. indica. Therefore, M. tenuiflora showed to be sensitive to P. juliflora phytotoxicity.

scholarly journals Allelopathic Interference of Ageratum conyzoides L. against Rice Varieties

2020 ◽  
pp. 69-76
Author(s):  
Bhawna Negi ◽  
S.S Bargali ◽  
Kiran Bargali ◽  
Kavita Khatri
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Leaf Extract ◽  
Water Soluble ◽  
Allelopathic Effect ◽  
Aqueous Extracts ◽  
Ageratum Conyzoides ◽  
Leaf Extracts ◽  
Rice Varieties ◽  
Seedling Length

Ageratum conyzoides L. is an invasive weed that has severely infested cultivated lands and interferes with the growth of crops. In this study aqueous extracts of 50 and 100% concentration were prepared from fresh and air dried plant parts (Leaves and roots) of A. conyzoides and their allelopathic effect was observed on seed germination and seedling growth of two rice varieties namely Sava and Geru. In Sava variety, a significant reduction in seed germination, seedling length and dry weight was recorded under dry leaf extract while under fresh leaf extract seed germination and seedling length was increased at 50% concentration as compared to control. In Geru variety both fresh and dry leaf extracts resulted in decreased seed germination and seedling growth with increasing concentration. Similar patterns were recorded for fresh and dry root extracts. The inhibitory effect of leaf extracts was more pronounced than root extract and overall dry aqueous extracts of leaf and root were more inhibitory than fresh aqueous extracts. Among varieties, Sava was least affected as compared to the Geru. This study indicated that A. conyzoides exert allelopathic effect towards rice crop by releasing water soluble phytochemicals.

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