Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

[Text] / P. V. Artyushenko [et al.] // J. Struct. Chem. - 2016. - Vol. 57, Is. 2. - P287-293, DOI 10.1134/S0022476616020074. - Cited References:27. - This work was supported by RFBR projects Nos. 13-04-00375 and16-04-00132. . - ISSN 0022-4766. - ISSN 1573-8779РУБ Chemistry, Inorganic & Nuclear + Chemistry, Physical

Аннотация: The B3LYD /6-31(p,d) density functional method is applied to pheromones of the forest xylophagous insects Ips typographus L., Monochamus urussovi Fisch., and Monochamus galloprovincialis Oliv. to calculate the absorption spectra and find excited states. The calculated results are used to assess the possible activity of the molecules when they are affected by solar radiation.

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Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, KSC Presidium, Int Res Ctr Studies Extreme States Organism, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk, Russia.

Доп.точки доступа:
Artyushenko, P. V.; Tomilin, F. N.; Kuzubov, A. A.; Ovchinnikov, S. G.; Tsikalova, P. E.; Ovchinnikova, T. M.; Soukhovolsky, V. G.; RFBR [13-04-00375, 16-04-00132]

/ P. V. Artyushenko [et al.] // Biophysics. - 2017. - Vol. 62, Is. 4. - P532-538, DOI 10.1134/S0006350917040029 . - ISSN 0006-3509
Аннотация: The ground and excited states of the pheromone molecules produced by xylophagous insects (the bark beetle Ips typographus L., the black fir sawyer beetle Monochamus urussovi Fisch., and the black pine sawyer M. galloprovincialis Oliv.) were modeled using a quantum chemical method utilizing DFT (density functional theory) with the B3LYP functional. The absorption wavelengths (energies) and dipole moments were calculated; the transitions of electrons from occupied to empty molecular orbitals were considered. The computed data were used to assess the stability of pheromone molecules exposed to environmental factors, such as solar radiation and humidity. © 2017, Pleiades Publishing, Inc.

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Держатели документа:
International Research Center for Studies of Extreme States of the Body, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Sukachev Institute of Forest, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Artyushenko, P. V.; Tomilin, F. N.; Kuzubov, A. A.; Ovchinnikov, S. G.; Tsikalova, P. E.; Ovchinnikova, T. M.; Soukhovolsky, V. G.

/ G. G. Polyakova, V. A. Senashova // Mikol. Fitopatol. - 2017. - Vol. 51, Is. 3. - С. 168-177 . - ISSN 0026-3648
Аннотация: Biotrophic fungus Melampsorella caryophyllacearum (Pucciniastraceae, Pucciniomycetes, Basidiomycota) developing in tissues of a fir (Abies sibirica) causes broom rust. Physiological mechanisms of plant resistance and fungus pathogenicity are not clear. The purpose of this work was an assessment of a role of secondary compounds and carbohydrates in mechanisms of interaction of Siberian fir and fungus M. caryophyllacearum. The 20-year age trees of Siberian fir grow in a mountain taiga zone in suburban forests of Krasnoyarsk (Central Siberia). Two options (one-year axes and needles of the current year without signs of damage by the fungus, and infected ones) were compared. Samples were taken on 3 trees 3 times during vegetation season: on June 21 (a phenology stage of shoot growth and a formation of pathogen etion), on July 19 (a phenology stage of summer vegetation and the period of active sporulation) and on September 10 (a phenology stage of autumn coloration of leaves and dying off the infected needles). The lignin and resin content were determined by weight method (the lignin determined with thioglycolic acid, the resins - by dissolving in pentane), carbohydrates - by the method of copper reduction using glucose as a standard, PAs - by coloring of solution after adding n-butanol / HCl mixture and heating. Starch was determined by coloring with iodine. The analysis of ANOVA proved reliable influence of various factors (phenology stage, plant organ (needles, axis), presence/absence of fungus infestation) on the content of PAs, lignin, monosaccharides (p < 0.05). The content of resin depended on plant organ only (resin content was more in axes, than in needles; p < 0.05). The tendency to starch accumulation in the infected axes during vegetation appeared to be caused by breakage of carbohydrates outflow. Infecting by the fungus caused decrease in the content of monosaccharides (p<0.05) that probably was connected with active consumption of mobile carbohydrates by the biotroph. The accumulation of PAs was revealed in needles and axes induced by M. caryophyllacearum fungus. Unlike PAs, the lignin concentration differently changed in the infected plant tissues. The accumulation of lignin was noted in diseased needles. In the infected axes in July the lignin content was significantly lower in comparison with control (p < 0.05). The found effect appeared to be manifestation of successful inhibition of plant protection by fungus. We suggested a hypothesis of the delayed lignification according to which a fungus inhibits synthesis of lignin and increases the chances in overcoming of protective barriers of a host. Perhaps, the pathogen influences carbon distribution by reducing its part for synthesis of lignin and increasing thereby synthesis of carbohydrates which further actively uses. The obtained data is agreed with concept according to which with effector molecules, biotrophs manipulate the defense machinery of the host in order to delay defense responses to gain enough time to multiply and spread into neighboring cells. © 2017 Russian Academy of Sciences. All rights reserved.

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Держатели документа:
Sukachev Institute of Forest, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Polyakova, G. G.; Senashova, V. A.

/ F. N. Tomilin [et al.] // J. Mol. Model. - 2018. - Vol. 24, Is. 11, DOI 10.1007/s00894-018-3859-5 . - ISSN 1610-2940
Аннотация: The correlation between the kinetic stability of molecules against temperature and variations in their geometric structure under optical excitation is investigated by the example of different organic pheromone molecules sensitive to temperature or ultraviolet radiation using the density functional theory. The kinetic stability is determined by the previously developed method based on the calculation of the probability of extension of any structural bond by a value exceeding the limit value Lмах corresponding to the breaking of the bond under temperature excitation. The kinetic stability calculation only requires the eigenfrequencies and vibrational mode vectors in the molecule ground state to be calculated, without determining the transition states. The weakest bonds in molecules determined by the kinetic stability method are compared with the bond length variations in molecules in the excited state upon absorption of light by a molecule. Good agreement between the results obtained is demonstrated and the difference between them is discussed. The universality of formulations within both approaches used to estimate the stability of different pheromone molecules containing strained cycles and conjugated, double, and single bonds allows these approaches to be applied for studying other molecules. [Figure not available: see fulltext.]. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Federal Research Center KSC SB RAS, International Scientific Center for Extreme Organism States Research, Krasnoyarsk, 660036, Russian Federation
Sukachev Institute of Forest, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Tomilin, F. N.; Fedorov, A. S.; Artyushenko, P. V.; Ovchinnikov, S. G.; Ovchinnikova, T. M.; Tsikalova, P. E.; Soukhovolsky, V. G.