Physiological and Molecular Alterations of Phycobionts of Genus Trebouxia and Coccomyxa Exposed to Cadmium

Vingiani, Giorgio Maria; Gasulla, Francisco; Barón‐Solá, Ángel; Sobrino-Plata, Juan; Henández, Luis E.; Casano, Leonardo M.

doi:10.1007/s00248-021-01685-z

Cited by 16 publications

(3 citation statements)

References 54 publications

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“…Meanwhile, the alkaline fraction showed high proportions of galactose, glucose and mannose. In addition, a comparative analysis between TR9 and, in this case, Csol CWs indicated that although both CWs had the same number of layers (three), these were thicker and more diffuse in TR9 and thinner and more defined in Csol than in TR9 [94,99,100]. Furthermore, glucose, mannose, galactose and rhamnose were the predominant monosaccharides in Csol, in contrast to the glycosyl composition of the TR9 CW.…”

Section: The Cell Wall and Extracellular Polymers In The Tolerance To Desiccationmentioning

confidence: 85%

Advances in Understanding of Desiccation Tolerance of Lichens and Lichen-Forming Algae

Gasulla

Campo

Casano

et al. 2021

Plants

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Lichens are symbiotic associations (holobionts) established between fungi (mycobionts) and certain groups of cyanobacteria or unicellular green algae (photobionts). This symbiotic association has been essential in the colonization of terrestrial dry habitats. Lichens possess key mechanisms involved in desiccation tolerance (DT) that are constitutively present such as high amounts of polyols, LEA proteins, HSPs, a powerful antioxidant system, thylakoidal oligogalactolipids, etc. This strategy allows them to be always ready to survive drastic changes in their water content. However, several studies indicate that at least some protective mechanisms require a minimal time to be induced, such as the induction of the antioxidant system, the activation of non-photochemical quenching including the de-epoxidation of violaxanthin to zeaxanthin, lipid membrane remodeling, changes in the proportions of polyols, ultrastructural changes, marked polysaccharide remodeling of the cell wall, etc. Although DT in lichens is achieved mainly through constitutive mechanisms, the induction of protection mechanisms might allow them to face desiccation stress in a better condition. The proportion and relevance of constitutive and inducible DT mechanisms seem to be related to the ecology at which lichens are adapted to.

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Section: The Cell Wall and Extracellular Polymers In The Tolerance To Desiccationmentioning

confidence: 85%

Advances in Understanding of Desiccation Tolerance of Lichens and Lichen-Forming Algae

Gasulla

Campo

Casano

et al. 2021

Plants

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“…Phytochelatin synthase (PCS) is an enzyme involved in PCs' synthesis from precursor tripeptide glutathione (GSH) [19]. PCs can sequester metals by chelating them with the sulfhydryl groups present in cysteines (Cys), building PC peptides [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Mitigating Effect of Trans-Zeatin on Cadmium Toxicity in Desmodesmus armatus

Piotrowska-Niczyporuk,

Bonda-Ostaszewska,

Bajguz

2024

Cells

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Phytohormones, particularly cytokinin trans-zeatin (tZ), were studied for their impact on the green alga Desmodesmus armatus under cadmium (Cd) stress, focusing on growth, metal accumulation, and stress response mechanisms. Using atomic absorption spectroscopy for the Cd level and high-performance liquid chromatography for photosynthetic pigments and phytochelatins, along with spectrophotometry for antioxidants and liquid chromatography–mass spectrometry for phytohormones, we found that tZ enhances Cd uptake in D. armatus, potentially improving phycoremediation of aquatic environments. Cytokinin mitigates Cd toxicity by regulating internal phytohormone levels and activating metal tolerance pathways, increasing phytochelatin synthase activity and phytochelatin accumulation essential for Cd sequestration. Treatment with tZ and Cd also resulted in increased cell proliferation, photosynthetic pigment and antioxidant levels, and antioxidant enzyme activities, reducing oxidative stress. This suggests that cytokinin-mediated mechanisms in D. armatus enhance its capacity for Cd uptake and tolerance, offering promising avenues for more effective aquatic phycoremediation techniques.

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“…Heavy metal stress has a significant effect on plant growth characters, physiology, anatomy and genetics [5]. This is also the case in unicellular green algae [6]. Heavy metals penetrate plant systems mostly through the soil [7] or via the atmosphere [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of cadmium on the molecular and morpho-physiological traits ofPisum sativumL.

Almuwayhi

2021

Biotechnology & Biotechnological Equipment

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Cadmium (Cd) attracts many researchers because of its potential toxicity to humans. It is available in the soil in high concentrations and can cause physiological, morphological and molecular damage to plants. This study investigated the effect of different concentrations of Cd on the DNA as well as the morphological and physiological traits of pea (Pisum sativum). Inter simple sequence repeat (ISSR) markers were utilized to detect the effect of Cd on the genomic DNA of pea. Two ISSR primers (UBC-26 and UBC-35) resulted in highly clear and reproducible bands. The unique polymorphic bands produced with primer UBC-26 were 250 bp, 450 bp and 600 bp in the control but disappeared under the low, medium and high concentrations of Cd. Moreover, the unique polymorphic bands produced with primer UBC-35 were of sizes of 1500 bp and 2000 bp in the control but disappeared in the low, medium and high concentrations, indicating a genotoxic effect of Cd on pea DNA. The toxicity of Cd also negatively affected the morphological traits of roots, stems, leaves, seeds, flowers and fruit, and their physiological traits. The concentration of some mineral elements, chlorophyll, carotene, sugars, lipids, protein and the activity of some enzymes (glutathione peroxidase, catalase, superoxide dismutase, glutathione reductase, ascorbate peroxidase) decreased compared with the control responding to the Cd toxicity. The study reveals the environmental hazards of Cd on the molecular, morphological and physiological traits of P. sativum.

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Physiological and Molecular Alterations of Phycobionts of Genus Trebouxia and Coccomyxa Exposed to Cadmium

Cited by 16 publications

References 54 publications

Advances in Understanding of Desiccation Tolerance of Lichens and Lichen-Forming Algae

Advances in Understanding of Desiccation Tolerance of Lichens and Lichen-Forming Algae

Mitigating Effect of Trans-Zeatin on Cadmium Toxicity in Desmodesmus armatus

Effect of cadmium on the molecular and morpho-physiological traits ofPisum sativumL.

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