Institutul de Genetică, Fiziologie şi Protecţie a Plantelor

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Author: search.filters.author.Rudi, LudmilaStart date: 2024

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    Biotechnological valorization of Arthrospira plantensis for heavy metal and rare earth element recovery from multimetallic effluents [Articol]
    (Editura USM, 2025) Cepoi, Liliana; Chiriac, Tatiana; Rudi, Ludmila; Zinicovscaia, Inga
    This study aimed to evaluate the bioaccumulation capacity of the cyanobacterium Arthrospira platensis for heavy metals and rare earth elements (REEs) from mono- and polymetallic effluents. Experimental systems were enriched with metals such as Ni, Cu, Zn, Cr, Fe, Sr, Mo, and REEs (Dy, La, Tb, Nd, Sm, Yb) at various concentrations. Metal accumulation in biomass was quantified using neutron activation analysis analysis. Biomass productivity was assessed spectrophotometrically based on a calibration curve, while oxidative stress was evaluated via malondialdehyde (MDA) content using the TBARS assay. Results demonstrated high accumulation capacities, with notable values for Cu (2870 mg/kg), Zn (up to 22500 mg/kg), Ni (1310 mg/kg), and La (>90% recovery). Biomass growth and MDA levels varied depending on the metal combination and concentration, indicating stress responses. A. platensis showed consistent resilience and was effective as a biosorbent, especially under moderate oxidative stress. The findings highlight its applicability in the bioremediation of wastewater containing diverse metal contaminants and its potential use as a matrix for biofortified supplements.
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    Extracts derived from spirulina cultivated on media with Cu and CuO nanoparticles as active agents for triticale seed priming
    (CEP USM, 2024) Cepoi, Liliana; Rudi, Ludmila; Chiriac, Tatiana; Zosim, Liliana; Iațco, Iulia; Rudic, Valeriu
    This study investigates the effects of seed priming in triticale using extracts from Arthrospira platensis cultivated with copper nanoparticles (CuNP) and copper oxide nanoparticles (CuONP). Results demonstrate significant increases in chlorophyll, carotenoid, and phenolic content, alongside enhanced antioxidant activity in the leaves. Notably, the treatment with nanoparticle-enriched extracts reduced malondialdehyde (MDA) levels, indicating a protective effect against oxidative stress. The findings suggest that spirulina-based extracts, even with the addition of nanoparticles, can enhance crop health, offering a sustainable approach to agriculture.