Shao Mingxia, Li Hongli, Zhu Shuhua, Huang Dandan, Li Chengkun
College of Chemistry and Materials Science, Shandong Agricultural University, Taian 271018, China.
Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization, College of Agriculture, Shihezi University, Shihezi 832000, China.
Plants (Basel). 2025 Aug 18;14(16):2567. doi: 10.3390/plants14162567.
Karrikins, a class of butenolide compounds derived from plant-derived smoke, positively regulate plant development and stress tolerance. However, their effects on postharvest fruit have scarcely been reported. In this study, karrikin solution was prepared by absorbing maize straw smoke into water, and kiwifruits () were immersed in different concentrations of this solution to determine the optimal concentration based on respiratory rate, relative conductivity, firmness, soluble solids content, and appearance of the kiwifruits. Subsequently, the regulation of reactive oxygen species (ROS) and soluble sugars metabolism by karrikins were studied. The results showed that the optimal dose of karrikins for kiwifruit was 1.20 μmol L. Karrikins enhanced the activities of superoxide dismutase, catalase, enzymes in the ascorbate-glutathione pathway, and soluble sugars metabolism, increased the concentrations of reducing ascorbate, glutathione, sucrose, and fructose-6-phosphate, suppressed ROS concentrations, and maintained the quality of kiwifruit during storage. These results suggest that karrikins could be a potential tool to modulate fruit ripening, with their effects depending on the dosage used.
卡里金是一类源自植物源烟雾的丁烯内酯化合物，对植物发育和胁迫耐受性具有正向调节作用。然而，它们对采后果实的影响鲜有报道。在本研究中，通过将玉米秸秆烟雾吸入水中制备卡里金溶液，并将猕猴桃浸入不同浓度的该溶液中，并根据猕猴桃的呼吸速率、相对电导率、硬度、可溶性固形物含量和外观来确定最佳浓度。随后，研究了卡里金对活性氧（ROS）和可溶性糖代谢的调节作用。结果表明，猕猴桃的最佳卡里金剂量为1.20 μmol/L。卡里金增强了超氧化物歧化酶、过氧化氢酶、抗坏血酸-谷胱甘肽途径中的酶的活性以及可溶性糖代谢，提高了还原型抗坏血酸、谷胱甘肽、蔗糖和6-磷酸果糖的浓度，抑制了ROS浓度，并在储存期间保持了猕猴桃的品质。这些结果表明，卡里金可能是调节果实成熟的一种潜在工具，其效果取决于所用剂量。
