COMPARISON OF DEVELOPMENTAL STABILITY OF BARLEY AND OATS DEPENDING ON FERTILIZATION DOSAGE
Abstract
The effect of 2 doses of fertilizer on the fluctuating asymmetry (FA) and the shape of the leaf plate of oats and barley was studied. The leaves were collected from plants grown on gray forest soils of the Suzdal Opole (Vladimir Oblast, Russia). The first dose for oats was N 30 P 30 K 30 (for crop rotation N 320 P 160 K 300), the second dose was N 45 P 45 K 45, (for crop rotation N 495 P 245 K 385). The first dose for barley was N 45 P 45 K 45, (for rotation N 285 P 225 K 225), the second dose was N 45 P 45 K 45 (for rotation – N 315 P 255 K 255). Marks (50 pairs) were applied to the scanned image of leaves and morphogeometric (Procrustean) analysis of variance was carried out, followed by the determination of fluctuating asymmetry by the Goodall's F-criterion. Additional parameters were the distances of the Procrustean space between the centers of the XY coordinate sets of the covariance matrix. The fertilizer dose affected the shape of oat leaf plates (p <0,0001) stronger than the shape of barley plates (p =0,01). Directional asymmetry was more characteristic of oat leaves. Fluctuating asymmetry was higher in barley leaves in control plants (F = 138,6; p <0,0001), and in oats – in leaves that developed under an increased dose of fertilizer (F = 53,5;
p <0,0001). Thus, an increased dose of fertilizer caused a decrease in the developmental stability of oat plants and an increase in that of barley. The authors state that the use of second-order leaves seems justified, since they do not have the high directional asymmetry inherent in flag leaves.
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