A novel role for cyanide in the control of cucumber (Cucumis sativus L.) seedlings response to environmental stress

Plant, Cell & Environment
Fei XuHong-Hui Lin

Abstract

The effects of potassium cyanide (KCN) pretreatment on the response of cucumber (Cucumis sativus L.) plants to salt, polyethylene glycol (PEG) and cold stress were investigated in the present study. Here, we found that KCN pretreatment improved cucumber seedlings tolerance to stress conditions with maximum efficiency at a concentration of 20 µM. The results showed that pretreatment with 20 µM KCN alleviated stress-induced oxidative damage in plant cells and clearly induced the activity of alternative oxidase (AOX) and the ethylene production. Furthermore, the structures of thylakoids and mitochondria in the KCN-pretreated seedlings were less damaged by the stress conditions, which maintained higher total chlorophyll content, photosynthetic rate and photosystem II (PSII) proteins levels than the control. Importantly, the addition of the AOX inhibitor salicylhydroxamic acid (1 mm; SHAM) decreased plant resistance to environmental stress and even compromised the cyanide (CN)-enhanced stress tolerance. Therefore, our findings provide a novel role of CN in plant against environmental stress and indicate that the CN-enhanced AOX might contribute to the reactive oxygen species (ROS) scavenging and the protection of photosystem by main...Continue Reading

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Citations

Jun 28, 2016·Biochemical and Biophysical Research Communications·Xue-Ying HanHong-Hui Lin
May 24, 2019·Plant & Cell Physiology·Guochun WuHonghui Lin
Mar 14, 2017·Frontiers in Plant Science·Tawanda ZidengaRichard T Sayre
Nov 20, 2019·International Journal of Molecular Sciences·Lu ChenYikun He
Jul 31, 2019·International Journal of Molecular Sciences·Xingji PengHonghui Lin
Jan 6, 2019·International Journal of Molecular Sciences·Muhammad ArfanHong-Hui Lin
Dec 10, 2019·Ecotoxicology and Environmental Safety·Chuan LiuLin Hao

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