Figure 1.

Influence of foliar application of Ca²⁺ on sugar beet root and shoot biomass and chlorophyll concentration under drought stress. (A) Beetroot dry weight; (B) beetroot diameter; (C) shoot dry weight; (D) chlorophyll concentration. Plants were grown in pots for a duration of 8 weeks. Five-week-old sugar beet plants were kept at 90% field capacity as control or exposed to drought stress (30% field capacity) for a duration of 3 weeks. Ca²⁺ was applied at BBCH14 and BBCH18 in concentration of 5 L ha⁻¹ corresponding to 540g Ca ha⁻¹. Leaves and beetroot were harvested at 60 days after sowing for biomass and chlorophyll analysis. Bars indicate means ± SD. Different letters denote significant differences according to ANOVA followed by SNK test (p < 0.05; n = 6).