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Research articles

ScienceAsia 51 (2023): 1-8 |doi: 10.2306/scienceasia1513-1874.2023.023


Salicylic acid regulated the antioxidant system of toon buds to improve preservation during cold storage


Xiaopu Shia,b, Taotao Shaoa, Yanhong Liuc, Juan Wanga, Mingqin Fana,d, Chunyan Jic, Hu Zhaoa,d,*

 
ABSTRACT:     Salicylic acid (SA) is a known plant hormone and a preservative. The postharvest loss of toon buds (Toona sinensis (A. Juss.) Roem.), an economically important woody vegetable, is one of the major constraints limiting its market value. Here, we investigated the postharvest quality attributes and physiological characteristics underlying the effect of SA on toon buds during cold storage (4?C). Toon buds were soaked in SA at different concentrations and subsequently transferred to 4?C conditions for 5 d. SA treatment delayed wilting, suppressed weight loss rate and water potential decrease, reduced respiration rate, slowed degradation of ascorbic acid (AsA) and anthocyanin, and inhibited malondialdehyde (MDA) and hydrogen peroxide accumulation. Furthermore, the activities of antioxidant enzymes, such as superoxide dismutase (SOD) and catalase (CAT), were enhanced by SA treatment; whereas peroxidase (POD) activity was inhibited. The most effective concentration of SA for treatment was 50 ?M, which maintained the quality of the toon buds, provided a fresh appearance, and enhanced the accumulation of bioactive compounds. Taken together, these findings suggested that SA improves the quality of postharvest toon buds during cold storage by regulating the antioxidant system. Our study provided a theoretical basis for the application of SA in cold storage treatment of toon buds.

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a Department of Biology and Food Engineering, Fuyang Normal University, Fuyang 236037 China
b Institute of Engineering Anhui Ecological Fermentation Engineering Research Center for Functional Fruit Beverage, Fuyang 236037 China
c Department of Information Engineering, Fuyang Normal University, Fuyang 236041 China
d Institute of Engineering Technology Research Center of Anti-aging Chinese Herb, Fuyang 236037 China

* Corresponding author, E-mail: zhaohu8196@sina.com

Received 6 Feb 2024, Accepted 11 Feb 2025