Sugar beet (Beta vulgaris subsp. vulgaris) is a commercially important biennial root crop, providing about 20% of the world’s annual sugar production. Seed quality is crucial for adequate plant growth and production. The productivity of sugar beet is often limited by heterogeneous germination in the field. In order to improve the sugar beet germination process, the effect of different concentrations of microalgal extracts from Chlorella vulgaris or Scenedesmus quadricauda was investigated by calculating several indices useful to evaluate the germination performance. Moreover, root morphological analysis was performed by using WinRHIZO software. B. vulgaris seeds were soaked with five different concentrations (from 0.1 to 10 mg C_org/L) of the microalgal extracts, considering the amount of organic carbon (C_org) in each extract. Our results show that these microalgal extracts exert a positive effect on sugar beet germination, by increasing efficiency and regularity of this critical process for B. vulgaris seeds. The best results, in terms of germination indices as well as root morphological traits, were reached by using C. vulgaris extract at the concentrations C2 (1 mg C_org/L) and C3 (2 mg C_org/L).

中文翻译：

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小球藻和四角藻微藻提取物对β-寻常种子萌发的影响。

甜菜（甜菜亚种寻常）是商业上重要宿根作物，提供有关全世界每年糖产量的20％。种子质量对于植物的适当生长和产量至关重要。甜菜的生产率通常受到田间异种发芽的限制。为了改善甜菜的发芽过程，通过计算可用于评估发芽性能的几种指标，研究了不同浓度的小球藻或四味小球藻微藻提取物的作用。此外，通过使用WinRHIZO软件进行了根形态分析。寻常芽孢杆菌种子用五种不同浓度（从0.1至10mgç浸泡_有机微藻提取物/ L），考虑到有机碳（C量_的有机中的每个提取物）。我们的结果表明，这些微藻提取物通过提高这种对于普通芽孢杆菌种子的关键过程的效率和规律性，对甜菜的发芽产生了积极的影响。在浓度为C2（1 mg C _org / L）和C3（2 mg C _org / L）的情况下，使用C. vulgaris提取物，可获得最佳的发芽指数和根系形态特征。