Ex-foliar applied extremolyte ectoine improves water management, photosystem, antioxidant system and redox homeostasis in Zea mays under cadmium toxicity

Özfidan-Konakçi, Ceyda; Elbasan, Fevzi; Arikan, Busra; Nur, Fatma; Yıldıztugay, Evren; Keleş, Ramazan; Küçüködük, Mustafa

doi:10.1016/j.sajb.2021.12.030

Cited by 4 publications

(2 citation statements)

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“…NO-donor, SNP, enhanced in vitro shoot proliferation of wild Malus species [ 53 ], and medicinal plants, such as Sideritis reaseri [ 54 ] and Canscora diffusa [ 55 ]. In Zea mays, ectoine ameliorated relative growth rate not only under Cd-stress, but also in non-stressful conditions [ 42 ]. Here in Lobularia maritima explants were subjected to priming agents only for short time, but their beneficial action was maintained for several weeks of culture duration, resulting in efficient multiplication (for Ect) and biomass accretion (for H 2 S, and NO).…”

Section: Resultsmentioning

confidence: 99%

“…It is a compatible solute, osmoprotectant, enzyme, and membrane stabilizer, acting as a chemical chaperone for structural proteins and as a DNA protectant [ 39 , 40 , 41 ]. Recently ectoine was reported to regulate water status in Cd-stressed maize, facilitating detoxification [ 42 ]. However, nothing is known about its impact on cultured plants subjected to multi-metal treatment.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Shoot Priming Efficiency to Counteract Complex Metal Stress in Halotolerant Lobularia maritima

Wiszniewska

Makowski

2023

Plants

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The study investigated whether short-term priming supports plant defense against complex metal stress and multiple stress (metals and salinity) in halophyte Lobularia maritima (L.) Desv. Plants were pre-treated with ectoine (Ect), nitric oxide donor—sodium nitroprusside (SNP), or hydrogen sulfide donor—GYY4137 for 7 days, and were transferred onto medium containing a mixture of metal ions: Zn, Pb, and Cd. To test the effect of priming agents in multiple stress conditions, shoots were also subjected to low salinity (20 mM NaCl), applied alone, or combined with metals. Hydropriming was a control priming treatment. Stress impact was evaluated on a basis of growth parameters, whereas defense responses were on a basis of the detoxification activity of glutathione S-transferase (GST), radical scavenging activity, and accumulation of thiols and phenolic compounds. Exposure to metals reduced shoot biomass and height but had no impact on the formation of new shoots. Priming with nitric oxide annihilated the toxic effects of metals. It was related to a sharp increase in GST activity, glutathione accumulation, and boosted radical scavenging activity. In NO-treated shoots level of total phenolic compounds (TPC) and flavonoids remained unaffected, in contrast to other metal-treated shoots. Under combined metal stress and salinity, NO and H2S were capable of restoring or improving growth parameters, as they stimulated radical scavenging activity. Ect and H2S did not exert any effect on metal-treated shoots in comparison to hydropriming. The results revealed the stimulatory role of nitric oxide and low doses of NaCl in combating the toxic effects of complex metal stress in L. maritima. Both NO and NaCl interfered with thiol metabolism and antioxidant activity, whereas NaCl also contributed to the accumulation of phenolic compounds.

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