Effects of Copper and Cadmium on the Protein Profile and DNA Pattern of Marine Microalgae Chlorella salina and Nannochloropsis salina

El-Din, Soad M. Mohy; Abdel-Kareem, Mohamed S.

doi:10.1007/s40710-019-00419-1

Cited by 10 publications

(1 citation statement)

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“…Climatic vagaries affect the environment in different ways which represent a constant threat. Urbanization, industrialization and other developments discharge considerable concentration of trace metals and toxic materials in the environment leading to an increase in pollution and degradation of soil resulting in economic losses of many crops (Kapahi and Sachdeva 2019;Mohy El-Din and Abdel-Kareem 2020;Ng et al 2020). The consistent increase in population and pollution hinder the fertility of agricultural soils resulting in failure of agriculture to meet the rising demands globally (Aibibu et al 2019).…”

Section: Introductionmentioning

confidence: 99%

The Alleviative Effects of Salicylic Acid on Physiological Indices and Defense Mechanisms of Maize (Zea Mays L. Giza 2) Stressed with Cadmium

Dakak

Hassan

2020

Environ. Process.

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The present study evaluated the physiological and biochemical mechanisms through which exogenous salicylic acid (SA) mitigates cadmium (Cd) stress in maize. The different concentrations of Cd included 0, 5, 10 µM CdCl 2 .3H 2 O. Half of plants received salicylic acid as a soil drench. Results showed that Cd exposure reduced chlorophyll contents, chlorophyll fluorescence, photosynthetic rate and activity of catalase (CAT). However, Cd stress enhanced nonphotochemical quenching (NPQ), the production of malondialdehyde (MDA) and activities of key antioxidant enzymes superoxide dismutase (SOD), ascorbate peroxidase (APX), guaiacol peroxidase (POD). The increased activities of antioxidant enzymes and concentration of MDA were reduced by exogenous application of SA as a soil drench. Our research proves that SA, as a novel endogenous plant hormone exerts beneficial physiological effects on plants as it has a dual role in scavenging active oxygen species (AOS) and modulating redox balance to enhance photosynthetic performance in cadmium-stressed maize plants. It was concluded that SA improved plant tolerance under Cd contamination and may have alleviated the inhibitory effect of Cd on photosynthesis by protecting maize plants against oxidative damage as indicated by the marked decline in net photosynthetic rates, quantum yield and chlorophyll content as well as alteration of antioxidants activity and accumulation of MDA. Collectively, results of the present study provide an insight into the alleviative role of SA in Cd-stressed maize and propose SA as a potential candidate in mitigating Cd toxicity.

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