过氧化氢酶
氧化应激
活性氧
超氧化物歧化酶
程序性细胞死亡
生物化学
APX公司
化学
细胞色素c
细胞凋亡
过氧化物酶
生物
酶
作者
Jingyi Liang,Fan Guo,Shifeng Cao,Ke Zhao,Kexin Zhao,Howard Wang,Xingfeng Shao,Yingying Wei,Chun-Dan Zhang,Yonghua Zheng,Feng Xu
标识
DOI:10.1016/j.plaphy.2022.03.029
摘要
The regulation of γ-aminobutyric acid (GABA) on plant anti-oxygenation and programmed cell death (PCD) in fresh-cut pumpkins was investigated. Exogenous GABA positively promoted GABA accumulation and alleviated oxidant damage in pumpkins tissue. Pumpkins treated with GABA showed lower electrolyte leakage, reactive oxygen species (ROS) and MDA content, while higher activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and ascorbate peroxidase (APX) as compared to the non-treated tissues. Our results also found that GABA treatment retarded DNA degradation and cytochrome c release and delayed the apoptosis of pumpkin cells. On the other hand, the inhibitor of GABA generation, 3-mercaptopropionic acid (3-MP) treatment not only accelerated oxidant damage, but also induced cell death involving chromatin condensation, DNA ladder and cytochrome c releasing. Taken together, our present research indicated that exogenous GABA could alleviate the wound-induced oxidative stress and PCD occurrence in fresh-cut pumpkins.
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