2-Morpholine-4ylethyl-3 H -1,2,4-triazole-3-ones (2a, 2b) were obtained from the condensation between the corresponding ethoxycarbonylhydrazones and 2-morpholinoethanamine. 2a was converted to acetohydrazide (4) via the formation of an ester derivative (3). Treatment of 2a and 2b with several aryl sulfonyl chlorides afforded the corresponding 2-arylsulfonyl-1,2,4-triazole-3-ones (5a-c and 6). The reaction of hydrazide (4) with benzyl iso-and benzyl isothiocyanate produced the corresponding carboxamide (8a) and carbothioamide (8b). The basic treatment of 8b yielded 5-mercapto-4 H -1,2,4-triazol-3yl)methyl]-2,4-dihydro-3 H -1,2,4-triazol-3-one (10). The synthesis of 1,3-thiazol-2(3 H) -ylidene-1,2,4-triazol-1-ylacetohydrazide (11) and 1,3-oxazole-2(3 H) -ylidene-1,2,4-triazole-1-yl)acetohydrazide ( 9) derivatives was performed from the reaction of 8a and 8b with substituted phenacyl bromides.All the newly synthesized compounds were screened for their antimicrobial activities and some of them were found to possess good or moderate antimicrobial activity.

Little is known about genetic differences among Quercus frainetto and Q. pubescens, two species of section Dascia Kotschy (subgenus Lepidobalanus, white oaks) that reach in Romania the margins of their natural distribution range. A set of genomic SSRs (simple sequence repeats) and EST (expressed sequence tags)-SSRs was used to estimate the genetic differentiation among four natural populations of the two species. Q. pubescens had higher values of genetic diversity than Q. frainetto, although the differences were not significant. Two out of seven marker-loci, QrZAG112 and QpZAG110, displayed very high FST values. Averaged across loci, the genetic differentiation was high and significant (FST = 0.067). Genetic distances were much higher among species than among populations within species. A Bayesian analysis indicated that two is the most appropriate number of genetic clusters. Using a blind procedure (i.e. based on multilocus genotypes only) the vast majority of sampled individuals (90%) could be assigned to the cluster corresponding to their phenotypes. When information about sampling localities was introduced in the assignment test, all individual trees were correctly classified. The higher degree of admixture in Q. frainetto as compared to Q. pubescens may be explained by different rates of introgressive hybridization.

To cite this version:Alexandru Curtu, Sofletea, Alin Toader, Mihai Enescu. Leaf morphological and genetic differentiation between Quercus robur L. and its closest relative, the drought-tolerant Quercus pedunculiflora

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Sea-buckthorn is an important species especially in terms of land reclamation, but it has also an appreciable commercial value. The aim of this review paper was to highlight the multiple uses of this shrub species across world. Data regarding taxonomy, chorology, ecological requirements and biological characteristics were also presented. Special attention has been given to the role of sea-buckthorn in land reclamation. The importance of this species is expected to increase in the future due to its high ecological amplitude and biological characteristics that make it suitable for many types of land, including arid terrains.

Forest vegetation across Southern Carpathians is distributed in altitudinal layers. The aim of this study was to highlight the productivity differences between the Southern and Northern slopes of the Southern Carpathians for Norway spruce, silver fir, birch and black alder. Data from 45 forest management plans (46.329 stands from the Southern slopes and 32.787 stands from the Northern slopes) were used. For each stand, the mean diameter, mean height, age, standing volume, current volume increment and production class were assessed. Elementary statistical methods were used to identify the factors influencing productivity. Significant differences between the Southern and Northern slopes were recorded for silver fir. The volume and the current volume increment were higher on the Northern slopes. In the case of birch and black alder, the same two parameters recorded higher values on the Southern slopes. As regards Norway spruce, insignificant differences were recorded between the two slopes. The correlation between structure type and stand volume was positive and statistically significant in the case of Norway spruce, silver fir and birch, but it was negative in the case of alder. Analysing the correlation between stand volume and the main stand characteristics also revealed a statistically significant positive correlation between age and stand volume for all analysed species. The results of this study are especially interested for the forest managers and forest owners whose aim is to obtain a higher productivity for the studied species.

., Enescu C.M., 2016. Structura, diversitatea și starea de sănătate a vegetației urbane în București: un studiu de caz bazat pe aliniamente. Bucov. For. 16(1): 9-22.Abstract. Street tree alignments are among the most common green spaces within urban areas. The aim of this study was to assess the interspecific variability and the degree of defoliation of the trees within street alignments situated along four of the most common boulevards from Bucharest, namely Kiseleff, Ştefan cel Mare, Virtuţii and Timişoara. The total evaluated distance was 17.6 km. 1621 trees were sampled and more than 30 taxa were recorded. Autochthonous species were more numerous, compared with the allochthonous ones, but the non-indigenous trees were better represented, mainly due to the large number of London plane tree, northern red oak and horse-chestnut. The most common autochthonous species were smallleaved lime, silver linden and narrow-leafed ash. Half of the species were large, reaching heights up to 25 m or more. All four boulevards were dominated by three species. Almost 80% of the trees were in good health and only 7% were almost dead. Several tree features in accordance with the conditions for establishment of future street tree alignments were discussed.

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