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The realization of productivity of Triticum aestivum L. modern cultivars is limited by yield losses caused by fungus diseases which intensively develop under high level of humidity and air temperatures. The usage of elicitors is the way to induce the plant immunity of cereals and minimize the pesticide pollution of the environment. It is established that the additive effect of elicitor (oxalic acid) and NO signal molecule decrease the stress after the action of biotic factor (Septoria tritici Blotch) in two spring wheat cultivars - 'Nedra' and 'Etud' in the field experiment conditions. The effect of oxalic acid was to decrease the yield losses by the way of decreasing the degree of corns' infection by pathogen. NO donor manifests the qualities of signal molecule and growth regulator under biotic stress that promoted the realization of wheat potential productivity. [ABSTRACT FROM AUTHOR]

The last leaf mesophyll structure of Triticum aestivum cv. 'Tronka' which was grown in the field experiment conditions was investigated by the method of confocal laser scanning microscopy. The experiment plants were treated by BAP and H2O2 in booting phase. It is established that plant treatment didn't effect on structure of leaf tissues but enhanced the functional ability of chloroplast pigment complexes. It has shown that influence of exogenous BAP enhanced chlorophyll autofluorescence, especially in palisade mesophyll cells, delayed aging of pigment complex. The action of exogenous mainly increased chlorophyll fluorescence of spongy mesophyll near stomata, but its influence was less significant than BAP. In winter wheat plants treated by BAP and H2O2 plant height and last leaf length enlarged. The plant treatment by BAP increased productivity of T. aestivum cv. 'Tronka' mainly by the cost of increasing of corns' quantity in ear and corns'weight. [ABSTRACT FROM AUTHOR]