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Alba Marina Cotes Philippe Lepoivre Jean Semal 《European journal of plant pathology / European Foundation for Plant Pathology》1996,102(5):497-506
An experimental protocol consisting in the colonisation of pregerminated bean seeds dressed withTrichoderma sp. was used in order to study the mechanisms correlated with the protective effect againstPythium splendens. Seed dressed with TH-11 (T. koningii) for 24 h presented a higher protective effect and a higher level of seed colonisation as compared to those dressed with TH-13 (T. longibranchiatum). The levels of seed coat colonisation by TH-11 and TH-13 was shown to be correlated with the carboxymethylcellulase activity, as measured in the seed coats retreived from germinating dressed bean seeds. The seed coat colonisation was also associated with an increased activities of endo-1,3--glucanase and endochitinase measured in seed extracts, and an inhibitory effect of seed extracts onPythium sporangia germination. Pretreatment of TH-13-dressed seeds with a commercial cellulase improved all parameters mentioned above, thus suggesting a role of cellulase activity in the colonisation process and the linked protective effect. The possible role of hydrolytic enzymes in the protective effects is discussed. 相似文献
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Timofeeva Yana O. Karabtsov Alexander Ushkova Maria Burdukovskii Maxim Semal Victoria 《Journal of Soils and Sediments》2021,21(2):1064-1078
Journal of Soils and Sediments - The aim of this study was to characterize the influence of soil contamination on the trace element accumulation in nodules, inter-element relationships inside the... 相似文献
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V. A. Semal’ 《Eurasian Soil Science》2010,43(3):278-286
The physical and physicochemical parameters of soils in the Ussuri Reserve presenting the typical soils of the Southern Sikhote-Alin
were determined for the first time with consideration for the composition and structure of the soil cover. The soils in the
surface horizons had loamy and clay loamy texture. It could vary depending on the overlain soil processes. All the soils were
characterized by the minimum base saturation and an increase in the actual acidity down the profile. The organic matter was
characterized by an abrupt decrease down the profile and the high mobility of the humus substances. The fractional-group humus
composition was analyzed, and the humus status of the soils was characterized. The burozems were regarded as background soils,
while a humus-illuvial podburs were referred to the rare ones. Recommendations were developed for the organization of soil
monitoring with key test plots in different ecological conditions as examples. 相似文献
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J. Semal 《European journal of plant pathology / European Foundation for Plant Pathology》1956,62(4):177-178
Conclusion There is a difference between the reactions ofApium graveolens to the typicaltomato aspermy virus on the one hand, and to the virus isolated by the writer from celery, and identified afterNoordam andRoland asCucumis virus 1st. Chr.
Noordam, on the other hand.If it is assumed that the difference is not caused by the varieties of celery used, this suggests thattomato aspermy virus andCucumis virus 1st. Chr. are not quite identical.Samenvatting Op selderij werd een virus gevonden dat dezelfde symptomen op toetsplanten, en dezelfde serologische reactie geeft alsCucumis virus 1st. Chr.
Noordam. Tot nu toe kon het tomato aspermy virus niet op selderij worden overgebracht. Als dit verschil niet veroorzaakt wordt door de gebruikte selderijvariëteiten, dan kan geconcludeerd worden, dat de twee virussen niet precies dezelfde zijn.Sustained by the Institute for Scientifical Research in Agriculture and Industry (IRSIA). 相似文献
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The chronological review and analysis of the existing regulatory documents relevant to the assessment of soil contamination with heavy metals have been presented. Attention has been given to the incorrect use of the term “total heavy metal content” and the method of its determination in a 5 M nitric acid solution recommended by some regulatory documents. The maximum permissible concentrations (MPCs) and tentatively permissible concentrations (TPCTPCs) for the total heavy metal contents are based on the above method; therefore, the conventional methods of determining the true total contents of heavy metals overestimate the degree of contamination. To avoid confusion, it has been proposed to call the content of a heavy metal in a 5 M nitric acid solution the “pseudototal” content and to compare the experimental results with the MPC or TPCTPC values only if the methods recommended by the regulatory documents were used. 相似文献
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The terms land, land plot, and soil as applied in normative documents related to land relations and land management practices are considered. Major legal documents regulating the use of agricultural lands are analyzed. Some drawbacks in the system of the state land management and land legislation resulting in the inefficient control of soil fertility on privately owned lands in the Far East of Russia are revealed. An obligatory certification of soils is recommended as a procedure necessary to ensure efficient control over soil fertility and the quality of agricultural produce. 相似文献
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V. A. Semal’ 《Eurasian Soil Science》2007,40(8):807-813
The soil cover of the Ussuri Nature Reserve in the southern part of the Sikhote Alin Range is described. The geographic regularities of the soil distribution within the territory of the reserve are analyzed, and the major types of soil cover patterns at different levels of their organization are characterized. 相似文献
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