Nigerosylmaltooligosaccharide (Nmo) has different degrees of polymerarization (DP) of nigerosyl oligosaccharides and maltooligosaccharides. We investigated the effects of treatments with Nmo, glucose, sucrose, and their combinations on the vase life of cut snapdragon (Antirrhinum majus) flowers. To apply these sugars, the cut ends of flower spikes were dipped into these sugar solutions. Treatment with 30 g L⁻¹ Nmo promoted bud development, resulting in flower opening at the upper part of the spikes. The Nmo treatment also extended the vase life of cut snapdragons more than glucose and sucrose treatments when vase life was evaluated as the time to when all flowers wilted. However, there were few open flowers, flowers were smaller and aurone levels were lower in the Nmo treatment, suggesting that treatment with Nmo alone is not sufficient for improving the vase life of cut snapdragons. Combined treatments of Nmo with glucose and sucrose increased the number of open flowers and significantly extended vase life more than treatment with glucose or sucrose alone. The deleterious effects of Nmo, such as the reduction in flower size and suppression of pigmentation, were alleviated by these combined treatments. Nmo was fractionated using a carbon celite column into DP2, DP3, DP4, and DP> 4. Spike length was significantly increased by fractions DP4 and DP>4, suggesting that oligosaccharides containing these fractions largely contribute to the development of spikes. In conclusion, Nmo is a readily available oligosaccharide that could be used in the manufacture of preservatives to improve the vase life of cut snapdragons.

Nigerosylmaltooligosaccharide (Nmo) 具有不同程度的聚合度 (DP) 的黑麦寡糖和麦芽低聚糖。我们研究了用 Nmo、葡萄糖、蔗糖及其组合处理对金鱼草 ( Antirrhinum majus ) 切花的瓶插寿命的影响。为了应用这些糖，将花穗的切端浸入这些糖溶液中。用 30 g L ^{-1 处理}Nmo 促进芽发育，导致花穗上部开花。当花瓶寿命被评估为所有花朵枯萎的时间时，Nmo 处理也比葡萄糖和蔗糖处理延长了切割金鱼草的花瓶寿命。然而，在 Nmo 处理中，开放的花朵很少，花朵更小，而且金黄酮水平较低，这表明单独使用 Nmo 处理不足以提高切花金鱼草的花瓶寿命。Nmo 与葡萄糖和蔗糖的联合处理比单独使用葡萄糖或蔗糖处理增加了开放的花朵数量并显着延长了瓶插寿命。这些组合处理减轻了 Nmo 的有害作用，例如减少花朵大小和抑制色素沉着。使用碳硅藻土柱将 Nmo 分馏为 DP2、DP3、DP4 和 DP>4。 DP4 和 DP>4 级分显着增加了穗长，这表明包含这些级分的寡糖在很大程度上有助于穗的发展。总之，Nmo 是一种容易获得的低聚糖，可用于制造防腐剂，以延长切好的金鱼草的瓶插寿命。