采后
赤霉素
化学
丙二醛
过氧化氢酶
超氧化物歧化酶
抗氧化剂
脂质过氧化
过氧化物酶
园艺
植物
生物化学
生物
酶
发芽
作者
Hu Zhao,Lv Weijian,Yali Fan,Huiquan Li
标识
DOI:10.1016/j.scienta.2018.04.018
摘要
Gibberellic acid (GA3) has been known as an important phytohormone signal in plants. Here, we investigated the physiology responses underlying GA3-induced postharvest toon sprout tolerance to chilling stress for 5 d. Results showed that exogenous application of GA3 remarkably decreased the browning and decay index of toon sprout. GA3 treatment prevented anthocyanin breakdown and inhibited the decreases of the total flavonoid, Vitamin C and titratable acidity in toon sprout during postharvest cold storage. In comparison to distilled water treatment, exogenous GA3 application maintained significantly higher levels of reducing sugar, soluble sugar and proline in toon sprout. Meanwhile, GA3 significantly reduced the accumulation of malondialdehyde (MDA) and hydrogen peroxide (H2O2) in toon sprout. Furthemore, GA3 enhanced the activities of antioxidant enzymes catalase (CAT) and superoxide dismutase (SOD) and reduced those of peroxidase (POD) and polyphenol oxidase (PPO). Taken together, our results suggested that exogenous application of GA3 effectively enhanced postharvest toon sprout tolerance to chilling stress by regulating antioxidant enzymes and weakening lipid peroxidation.
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