Thiamine, also known as vitamin B₁ (VB₁), plays a key role in regulating plant growth and development. However, no studies have addressed its role in regulating postharvest fruit and vegetable senescence. Herein, the effects of VB₁ on postharvest senescence and antioxidant-compound accumulation in jujube (Ziziphus jujuba) fruit stored at 25 °C were investigated. Soaking postharvest jujube fruit with 1 mmol/L VB₁ drastically decreased its weight loss, decay incidence, and respiration rate and improved firmness during the first seven days of storage. VB₁ treatment increased jujube fruit NADPH oxidase, superoxide dismutase, and catalase activities, and changed its H₂O₂ content. Furthermore, VB₁ treatment also dramatically increased the ascorbic acid level, total phenolics content, total flavonoids accumulation, and total antioxidant capacity of the postharvest jujube fruit. However, the increase in antioxidant enzyme activities and antioxidant-compound accumulation were partially reversed by 0.1 mmol/L diphenyleneiodonium chloride, a specific inhibitor of NADPH oxidase. Accordingly, the role of VB₁ in delayed fruit senescence and enhanced antioxidant-compound accumulation were discussed in terms of NADPH-oxidase-regulated H₂O₂ signaling. Overall, this study provides practical and theoretical information regarding a simple new method for the maintenance of jujube fruit quality during storage at ambient temperature.

硫胺素，也称为维生素 B ₁ (VB ₁ )，在调节植物生长发育中起关键作用。然而，没有研究表明它在调节采后果蔬衰老中的作用。在此，研究了 VB ₁对25°C 贮藏的枣 ( Ziziphus jujuba ) 果实采后衰老和抗氧化剂化合物积累的影响。_{用1 mmol/L VB 1}浸泡采后枣果实在贮藏的前7天显着降低了其重量损失、腐烂发生率和呼吸速率，并提高了硬度。VB ₁处理增加了枣果实 NADPH 氧化酶、超氧化物歧化酶和过氧化氢酶的活性，并改变了其 H ₂O ₂含量。此外，VB ₁处理还显着提高了采后枣果实的抗坏血酸水平、总酚含量、总黄酮积累和总抗氧化能力。然而，抗氧化酶活性和抗氧化化合物积累的增加被 0.1 mmol/L 的 NADPH 氧化酶特异性抑制剂二苯碘鎓氯化物部分逆转。_{因此，从NADPH-氧化酶调节的H 2} O ₂角度讨论了VB ₁在延迟果实衰老和增强抗氧化化合物积累中的作用。发信号。总体而言，本研究提供了一种简单的新方法在常温贮藏期间保持枣果实品质的实用和理论信息。