Eco-trophic Relationships and Frequency of Occurrence of Mycobiota of Some Trees grown on the Roadside: the Case of Baku Highways

The current study is devoted to eco-trophic relationships and frequency of occurrence of fungal species involved in the formation of tree mycobiota along the highway. As a result, it was possible to determine the possibility of using determined indicators of tree mycobiota in assessing the environmental status of the area near the highway. With this purpose rhizosphere and mycobiota of the leaves of such trees as Platanus orientalis, Populus nigra and Pinus eldarica growing at various distances (10-100 m) from Baku highways with different traffic intensity have been studied. The samples were taken for the period from 2016 to 2018. The sensitivity of fungi species to pollution from the influence of motor transport has been evaluated. It has been established that the structure of micromycete complex spread both in leaves and rhizosphere of trees growing on the roadside is disturbed by the effects of highway. Near the highway the decrease of species diversity of fungi and increase of the number of dark-colored mycelium fungi species have been observed. This, in turn, leads to the disturbance of the ecological functions of roadside ecosystems. The possibility of using such species as A.fumigatus, Botryotrichum piluliferum, P.cuslopium, P.funiclozum, St.chartarum as indicators has been determined

Eco-trophic Relationships and Frequency of Occurrence of Mycobiota of Some Trees grown on the Roadside: the Case of Baku Highways

The current study is devoted to eco-trophic relationships and frequency of occurrence of fungal species involved in the formation of tree mycobiota along the highway. As a result, it was possible to determine the possibility of using determined indicators of tree mycobiota in assessing the environmental status of the area near the highway. With this purpose rhizosphere and mycobiota of the leaves of such trees as Platanus orientalis, Populus nigra and Pinus eldarica growing at various distances (10-100 m) from Baku highways with different traffic intensity have been studied. The samples were taken for the period from 2016 to 2018. The sensitivity of fungi species to pollution from the influence of motor transport has been evaluated. It has been established that the structure of micromycete complex spread both in leaves and rhizosphere of trees growing on the roadside is disturbed by the effects of highway. Near the highway the decrease of species diversity of fungi and increase of the number of dark-colored mycelium fungi species have been observed. This, in turn, leads to the disturbance of the ecological functions of roadside ecosystems. The possibility of using such species as A.fumigatus, Botryotrichum piluliferum, P.cuslopium, P.funiclozum, St.chartarum as indicators has been determined

Adaptive reaction of cotton accessions of G. hirsutum L. and G. barbadense L. species to drought stress

Adaptation, process of the adjustment of a plant to specific environmental conditions, is provided by physiological mechanisms (physiological adaptation), and at population level (species) by mechanisms of genetic variability, heredity and selection (genetic adaptation). Intraspecific and the interspecific physiological assessment of adaptation potential to drought stress was carried out on 267 collection accessions and varieties of a cotton (197 accessions of G. hirsutum L. and 70 of G. barbadense L.). Comparative study of the stress reaction of tested accessions to unfavorable environmental factors was carried out based on stress depression indices of viability of seeds in sucrose solution-imitating drought. As a result of the studies different sensitivity of plants to abiotic stress was determined. The amplitude of the changes of physiological parameter during stress allowed roughly divide cotton accessions within each species into groups by defining different degrees of comparative drought resistance of samples. Analysis of the percentage ratio of high drought resistant accessions within species, revealed differences between G. hirsutum L. and G. barbadense L. For the specie G. hirsutum L. percentage of accessions with high drought resistance was 9.1%, for specie G. barbadense L.-28.6%. G. barbadense L., in our view, is characterized by a greater potential for volatility and acclimatization to the new, unusual conditions, capable of better resisting the adverse effects of drought and has great promise for using in breeding. It was found that because of the stress in drought resistant varieties activation of RNA synthesis, increase of labile and decrease of stable DNA was observed which indicates an increase of the physiological liability and functional activity of the genetic apparatus. In susceptible varieties a reduction in the synthesis of RNA and DNA and displacement of DNA fraction ratio towards the stable were noted

Crystal structure and Hirshfeld surface analysis of phenyl(5,7,8a-triphenyl-1,2,3,7,8,8a-hexahydroimidazo[1,2-a]pyridin-6-yl)methanone with an unknown solvent

In the title compound, C32H28N2O, the imidazolidine and pyridine rings of the central hexahydroimidazo[1,2-a]pyridine ring system adopt envelope and screw-boat conformations, respectively. The molecule exhibits two weak intramolecular pi-pi interactions between phenyl rings. In the crystal, molecules are linked via pairs of C-H center dot center dot center dot O hydrogen bonds, forming inversion dimers. The dimers are further linked by pairs of C-H center dot center dot center dot pi interactions, forming infinite chains along the c-axis direction. A Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H center dot center dot center dot H (73.4%), C center dot center dot center dot H/H center dot center dot center dot C (18.8%) and O center dot center dot center dot H/H center dot center dot center dot O (5.7%) contacts. The contribution of some disordered solvent to the scattering was removed using the SQUEEZE routine [Spek (2015). Acta Cryst. C71, 9-18] in PLATON. The solvent contribution was not included in the reported molecular weight and density