Wang Bo, Wang Shan, Geng Qingru, Zhang Ninghui, Zhuo Qiuhan, Zhou Qianru, Zeng Hong, Tian Jun
JSNU-UWM International Cooperation Joint Research Laboratory of Food Safety and Microbial Functional Genomics, School of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China.
Youjiang Medical University For Nationalities, Baise 533000, Guangxi, PR China.
J Agric Food Chem. 2024 Dec 11;72(49):27479-27494. doi: 10.1021/acs.jafc.4c07055. Epub 2024 Nov 23.
Sweet potato () serves as a significant food and economic crop worldwide. However, its production and safety are jeopardized by black rot, a disease caused by . Although polyamines (PAs) are common biological growth factors, their function in the storage of fruits and vegetables remains poorly understood. This study examines the physiological roles of both exogenous and endogenous PAs in , particularly their metabolism via gene knockout techniques. Additionally, we assessed how exogenous PAs affect sweet potato storage resistance. Our findings reveal that PAs are crucial in managing oxidative and cell wall stress in . At high concentrations, PAs displayed cytotoxic effects through the upregulation of nitric oxide synthase (). Furthermore, exogenous PAs significantly enhanced the defense mechanisms of sweet potatoes during storage. The concurrent use of perillaldehyde (PAE), a natural antibacterial compound, additionally decreased the incidence of black rot in sweet potatoes. This study provides a novel strategy and theoretical basis for the prevention and control of fungal diseases in stored fruits and vegetables.
甘薯（）是全球重要的粮食和经济作物。然而，其生产和安全受到由引起的黑腐病的威胁。尽管多胺（PAs）是常见的生物生长因子，但其在果蔬贮藏中的作用仍知之甚少。本研究通过基因敲除技术研究了外源和内源PAs在中的生理作用，特别是它们的代谢。此外，我们评估了外源PAs如何影响甘薯的贮藏抗性。我们的研究结果表明，PAs在管理中的氧化应激和细胞壁应激方面至关重要。在高浓度下，PAs通过上调一氧化氮合酶（）表现出细胞毒性作用。此外，外源PAs显著增强了甘薯在贮藏期间的防御机制。同时使用天然抗菌化合物紫苏醛（PAE），还降低了甘薯黑腐病的发病率。本研究为贮藏果蔬真菌病害的防治提供了新策略和理论依据。
