Exogenous proline mediates alleviation of cadmium stress by promoting photosynthetic activity, water status and antioxidative enzymes activities of young date palm (Phoenix dactylifera L.)

Ecotoxicology and Environmental Safety
M ZouariF Ben Abdallah

Abstract

The ability of exogenous compatible solutes, such as proline, to counteract cadmium (Cd) inhibitory effects in young date palm plants (Phoenix dactylifera L. cv Deglet Nour) was investigated. Two-year-old date palm plants were subjected for five months at different Cd stress levels (0, 10 and 30 mg CdCl2 kg(-1) soil) whether supplied or not with exogenous proline (20mM) added through the irrigation water. Different levels of Cd stress altered plant growth, gas exchanges and chlorophyll content as well as water status, but at different extent among them. In contrast, an increase of antioxidant enzymes activities of Cd-treated plants in association with high amounts of proline content, hydrogen peroxide (H2O2), thiobarbituric acid reactive substances (TBARS) and electrolyte leakage (EL) were observed. Interestingly, exogenous proline mitigated the adverse effects of Cd on young date palm. Indeed, it alleviated the oxidative damage induced by Cd accumulation and established better levels of plant growth, water status and photosynthetic activity. Moreover, proline-treated plants showed high antioxidant enzymes activities (superoxide dismutase, catalase and glutathione peroxydase) in roots and leaves as compared to Cd-treated plants.

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Citations

Oct 5, 2017·Bulletin of Environmental Contamination and Toxicology·Qiaoying ZengQiwei Li
Jan 19, 2019·International Journal of Phytoremediation·Chengwei DuanXiaoyang Cui
Dec 5, 2019·Anais Da Academia Brasileira De Ciências·Raissa SchwalbertFernando T Nicoloso
Jan 30, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Anket SharmaMarco Landi
Sep 13, 2020·Environmental Science and Pollution Research International·Ziwei DingQingye Sun
Aug 25, 2019·Environmental Science and Pollution Research International·Éllen Cristina Alves de Anicésio, Francisco Antonio Monteiro
Aug 6, 2021·Environmental Science and Pollution Research International·Éllen Cristina Alves de Anicésio, Francisco Antonio Monteiro
Oct 14, 2021·Environmental Science and Pollution Research International·Rini Rahul, Pallavi Sharma
Jan 30, 2022·Environmental Science and Pollution Research International·Li Ma, Shengchang Yang

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