Early physiological response of potato plants to entomopathogenic fungi under hydroponic conditions

Endophytic entomopathogenic fungi are promising agents for the promotion of plant growth, the activation of immunity, and protection against phytopathogens. However, physiological changes in plants after treatment with fungi are insufficiently studied. We investigated the effect of potato inoculation with conidia from Metarhizium robertsii and Beauveria bassiana on the growth (fresh and dry weight, length of shoots and roots, counts of stolons and leaves, and total surface area of leaves) and physiological parameters (pigment contents, free proline and malondialdehyde content, and activity of antioxidant enzymes) at the initial stage of the plant–fungus interaction (seven days) under hydroponic conditions. The results showed that the fungi could act as an immune-modulating factor for plants based on the increase in malondialdehyde and proline contents. At the same time, we observed growth retardation and a decrease in the content of photosynthetic pigments, which may be caused by a tradeoff between plant growth and the immune response

The priming of potato plants induced by brassinosteroids reduces oxidative stress and increases salt tolerance

This is the first study to show that brief pretreatment of potato plants with two brassinosteroids differing in structure causes in plants the ability to react to delayed salt stress by accumulation of compounds with antioxidant activity and by increased salt tolerance

Двумерное стационарное течение бинарной смеси и вязкой жидкости в плоском слое

Nonlinear model of convection in Oberbeck-Boussinesq approximation describing the flat joint motion of a binary mixture and viscous fluid with a common interface is investigated. It is important that the longitudinal temperature gradient and the concentration is quadratic dependence on the coordinate x. Stationary solution of the system is builtВ настоящей статье рассматривается нелинейная модель конвекции в приближении Обербека-Буссинеска, описывающая плоское совместное движение бинарной смеси и вязкой теплопроводной жидкости с общей поверхностью раздела. Важно, что продольный градиент температуры и концентрации имеет квадратичную зависимость от координат х. Построено стационарное решение систем

Monotonous Perturbations of an Equilibrium Condition of Two-Layer System of Binary Mixes

Исследована устойчивость относительно монотонных возмущений равновесного состояния системы бинарных смесей с общей поверхностью раздела и одной свободной границей. Найдены явные формулы зависимости числа Марангони от волнового числа и других физических параметров. Показано, что деформация границ раздела приводит к понижению критического значения числа Марангони.Stability concerning monotonous indignations of an equilibrium condition of system of binary mixes with the general interface and one free boundary is investigated. Formulas of dependence of number of Marangoni from wave number and other parametres are found. It is shown that interface deformation leads to critical value of number of Marangoni decrising

A Priori Estimates of the Adjoint Problem Describing the Slow Flow of a Binary Mixture and a Fluid in a Channel

We obtain a priori estimates of the solution in the uniform metric for a linear conjugate initial-boundary inverse problem describing the joint motion of a binary mixture and a viscous heat-conducting liquid in a plane channel. With their help, it is established that the solution of the non-stationary problem with time growth tends to a stationary solution according to the exponential law when the temperature on the channel walls stabilizes with time

Instability of an Equilibrium State of Two Binary Mixtures with the General Interface and One Free Boundary

Исследована устойчивость равновесного состояния двух бинарных смесей относительно произ- вольных возмущений. Численно, методом ортогонализации, получена зависимость комплексного декремента от волнового числа. Показано, что для недеформируемых поверхностей раздела при увеличении числа Марангони область неустойчивости также увеличивается. Определены обла- сти устойчивости системы с ростом термодиффузионных эффектов на поверхностях раздела.The stability of an interface of two binary mixtures under any perturbations is investigated. The dependence of the complex decrement on the wave number is deduced by means of a numerical method of orthogonalization. We show that the area of instability increases for not deformable interfaces at increase of the Marangoni number, too. The areas of stability of a system with growth thermal diffusion effects on an interface are determined

Построение точного решения специального вида для трехмерной задачи термоконцентрационной конвекции в двухслойной системе

A three-dimensional joint flow of a liquid and a binary mixture with common interface is considered. It is assumed that the temperature field in the layers has a quadratic distribution. An exact solution of certian model problem is constructed, explicit expression for all the required function are obtained using a specific closing relationРассмотрено трехмерное совместное течение жидкости и бинарной смеси с общей границей раздела. Предполагается, что поле температуры в слоях имеет квадратичное распределение. Построено точное решение некоторой модельной задачи. Получены явные выражения для всех искомых функций с помощью определенного замыкающего соотношени