Brassinosteroids as a Factor of Photosyntetic Activity Increase of Improved Potatoes

Uromova Irina Pavlovna¹, Koposova Natalia Nikolaevna¹, Dabahova Elena Vladimirovna¹, Shtyrlina Olga Veniaminovna², Shtyrlin Dmitry Aleksandrovich²

¹Nizhny Novgorod State Agricultural Academy, 97, Gagarina av., Nizhny Novgorod, 603107 ²Minin Nizhny Novgorod State Pedagogical University, 1, Ulyanova street, Nizhniy Novgorod, GSP-37, 603950

ABSTRACT: Under the conditions of protected ground, we tested stress adaptogen Epin- Extra (24-epibrassinolide). The goal of the study was to study the effect of growth regulators on photosynthetic activity, productivity and biochemical indicators of the improved potato of perspective varieties of the native (Udacha variety) and foreign (Red Scarlett variety) selection, produced by the apical meristem method in the conditions of the Volga-Vyatka region. The obtained results allow us to consider the use of the drug promising for improving growth and development of improved plants. Addition of Epin-Extra into artificial nutrient media at the last stage of micropropagation in vitro and the use of the drug during microplants cultivation under the protected ground conditions in the budding phase enhance physiological processes, such as the assimilative surface of leaves, the net productivity of photosynthesis, depending on a variety. Through photosynthesis stimulation and increase in plant stress resistance of plants, Epin-Extra increases productivity, biochemical parameters such as starch content, dry matter, it also helps to reduce the accumulation of nitrates in tubers, depending on a variety.

KEYWORDS: Epin-Extra; regulator of anti-stress effect; photosynthesis; assimilative surface of leaves; Murashige-Skoog medium; yield of potato; starch; dry matter; nitrates

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