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Structure and the maintenance of pigments of photosynthesis in the plate of leaves of wheat

Authors: Dashtojan Y. V., Kasatkin M. Y.

Features in the maintenance of pigments of various groups (chlorophyll а and chlorophyll b, carotenoids), as well as parities between them in the leaves of wheat belonging to different phytomerous of shoot are established. The minimum or maximum maintenance of chlorophyll and carotenoids can be observed in various leaves that depends on conditions of vegetation of plants.

Features distribution of plants in wheat agropopulation on classes of the variation of elements efficiency of the ear

Authors: Goryunov A. A., Ivleva M. V.

Vegetation conditions essentially affect distribution of plants in agropopulation of durum wheat on classes of a variation number of spikelets, quantities kernels an  ear and their weight. Among cultivars of the Saratov selection in the conditions of extreme year on agroclimatic conditions it is characteristic various number of plants: to age–old cultivars – the small classes, to new cultivars – the big classes of a variation. Favorable agroclimatic conditions raise number of the plants carried to higher classes of a variation of elements of efficiency of an ear.

Morfologo-anatomic aspects of development internodes and nodesof phytomersof shoot wheat

Authors: Signaevskiy V. D., Ivleva M. V., Timirova S. I.

The description and parametres of development of cellsintemodes and nodes the fifth phytomer of shootof spring wheat is presented. Phytomerous distinctions intemodes a stem on length, a thickness of a wall, diameter of a pith are established. In ontogeny shootwheat the natural sequence of development of mechanical, vascular and epidermaltissuesinternode a stem is observed.

The structure mesophyll of the plate leaves of wheat

Authors: Dashtojan Y. V., Kasatkin M. Y.

A variety of spending bunches of a plate of leaves is noted. Two facings had some bunches. In cells of an external facing are noted хлоропласты. Cells of an internal facing are presented by fibres sclerenchyma, having a kernel and plasmodesms. In mesophylle plates of leaves it is allocated 11 type cells. In the top leaves a variety of types of cells decreases, and the share of cells with the expressed meshy form increases.

Influence of osmotic stress on wheat seedlings development

Authors: Gagarinsky E. L., Filimonov V. V., Kasatkin M. Y.

The growth reaction and pigments amount in wheat seedlingsunder water deficit modeling osmotic stress was studied. An environmental increasing of osmotic stress is an inductor of pigment systems changes. The pigment systems sensitivity depends on the type of pigments. The data observed in the experiment can be useful for early diagnosticpotential resistancevarieties to water deficit.

 

Metameasured principle of system of regulation efficiency of wheat

Features ontogeny wheat and existing hypotheses of integrity of a plant are considered. It is offered new to the concept of system of regulation of efficiency of wheat on the basis of autonomy formation metameres runaway and a special role sclerenchymes in a plant life.

Specific features of pigment distribution on spring wheat metamers

Authors: Kasatkin M. Y., Gagarinsky E. L.

Studied the content of pigments and their distribution in seedlings of spring wheat in rainfed conditions. Changes in the quality and quantity of pigments in the zones of the body indicate the specificity of their growth activity. Comparative analysis of different pigments metameres suggests different physiological maturity subsystems each metamer.

Microevolution of elements productivity of shoot spring soft wheat of the saratov selection

Authors: Gagarinsky E. L., Signaevskiy V. D.

The structure of elements of efficiency of runaway of summer soft wheat of the different grades created from the beginning of the XX-th century is analysed. Various tendencies in development of length of a stalk, number of spikelets and kernels an ear, weight kernels are revealed.

Integration of morphogenesis of shoot and root system of seedlings of wheat

Authors: Strapko A. M., Kasatkin M. Y.

The article studies the features of morphogenesis of wheat seedlings, the maintenance of pigments of photosynthesis at presence and absence of light, as well as at the removal of the main and additional germinal roots and shoot.