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Fenotypová modifikovatelnost listu cukrové řepy během vegetatce s odhadem listové plochy

Morphological changes of sugar beet leaves in vegetative growth were monitored in the 2014 and 2015 growing seasons. In both years leaf samples were collected on 6 dates from late May to September at 20-day intervals, therefore more than 12, 000 leaves were measured. On 20 August, the most common leaf length (309 leaves) ranged from 48.7 to 51.3 cm, petiole length was between 20.0 and 21.7 cm (274 leaves) and single leaf area (278 leaves) was between 117 and 139 cm2 (278 leaves). The most common leaf blade width was recorded on 10 July, and it ranged from 10.1 to 10.8 cm (279 leaves). Linear regression showed a highly significant relation¬ship for leaf blade length and leaf area (R2 = 0.55, p < 0.001), leaf blade width and leaf area (R2 = 0.87, p < 0.001) and leaf petiole length and leaf area (R2 = 0.18, p < 0.001). Thus, leaf blade width was the best parameter for predicting leaf area.

sugar beet canopy, leaf length, petiole length, leaf blade width, leaf area, regression models

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