Dynamics of accumulation of photosynthetic pigments in leaves <i>Trititrigia Cziczinii</i> Tzvel.

Abstract

The productivity of plants depends on the efficiency of photosynthetic pigments, of which chlorophyll is the most important. In the conditions of sod-podzolic medium loamy soils of the Moscow region, the features of the accumulation of photosynthetic pigments (chlorophyll a and chlorophyll b) and the photosynthetic apparatus of a new synthetic grain crop Trititrigia cziczinii Tzvel. were studied. (Pamyati Lyubimovoj variety, line № 3202) compared to the winter wheat variety (Rubezhnaya) obtained by remote hybridization. The dynamics of the accumulation of chlorophyll a and chlorophyll b in the leaves of grain crops was measured during the generative development of plants starting from the earing phase (BBCH-scale code 52-53) on a spectrophotometer. The research results showed that all the studied varieties have their peaks of accumulation of the amount of chlorophyll a and chlorophyll b, depending on their biological characteristics. In winter wheat, the maximum amount of the sum of the two pigments fell on July 2 and amounted to 3,3 mg/g of raw leaf mass. In the trititrigia variety of the Pamyati lyubimovoj, the peak of pigment accumulation was noted almost a month later (July 30). The amount of pigments was 4,45 mg/g of raw mass. Trititrigia line № 3202 accumulated the maximum amount of chlorophyll (4,20 mg/g of raw leaf mass) even later than the Pamyati Lyubimovoj variety – August 5. The higher content of photosynthetic pigments in the cells of trititrigia leaves, compared with winter wheat, may indicate its high adaptive characteristics. And the peaks of chlorophyll accumulation, shifted by almost a month, indicate the long-term work of the assimilation apparatus and the uniqueness of the new synthetic culture. The leaf area measured in a straight linear way was different for all the studied objects. The largest leaf area was noted in the variety of trititrigia in Pamyati Lyubimovoj – 21,2 thousand m2/ha on July 13. The maximum leaf area at line № 3202 was 14.4 thousand m2/ha, then it gradually decreased. Rubezhnaya winter wheat had a significantly lower leaf area compared to trititrigia samples (the maximum was 6.1 thousand m2/ha), then the activity of the active assimilating surface decreased.