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Плеханов, С. Е.; Chemeris, Yu. K.

doi:10.1023/a:1025806921291

Cited by 31 publications

(8 citation statements)

References 11 publications

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“…Among physiological processes, respiration is the most sensitive to the presence of heavy metals. When Zn is present in cytoplasm and mitochondria, it inhibits Krebs cycle and transportation of electrons in the process of oxidative phosphorilation (10,11,18,20,24,25). Due to negative effect of zinc on the main physiological process during germination, its presence in the germination medium largely reduces the percentage of germinated seeds; in higher concentrations, above 0.17 M, like in this case, it completely inhibits the germination process.…”

Section: Resultsmentioning

confidence: 89%

“…The heavier growth and development were also the result of a disturbed anatomic structure of conducting root system, since the number and volume of conducting vessels is reduced in the plants exposed to heavy metals. The presence of heavy metals inhibits the normal division and elongation of cells, which is also one of the causes of disturbed growth and development of the plants exposed to heavy metals (17,18,20).…”

Section: Resultsmentioning

confidence: 99%

“…still not quite clear, but it was proved that it induced numerous anatomic and morphological alterations in plants. Negative effect of high concentration of zinc on the growth and development of a plant is based on its genotoxicity and a disturbance of cell division (2,12,17,20). A great number of authors investigated the effect of zinc on seed germination and growth and development of plants (3,5,7,8,12,13,14,18,22,23).…”

Section: Introductionmentioning

confidence: 99%

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Influence of Zinc (ZN) on Germination of Wheat (Triticum AestivumL.)

Stanković

Topuzović

Marković

et al. 2010

Biotechnology & Biotechnological Equipment

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The paper presents the results of research of negative effects of zinc (Zn) on seed germination of wheat (Triticum aestivum L.). Besides the impact on the percentage of germination, the toxic effect on some morphometric characteristics was followed, too. Ripe seeds of wheat were exposed in standard laboratory conditions to the influence of zinc, in form of zinc chloride (ZnCl 2), at different values of concentration. For each value of concentration it was determined the percentage of germinationed seeds, as well as the length of root and shoot. It as found the value of the concentration of ZnCl 2 , which inhibited completely germination of wheat. The mean values of the length of root and shoot for each concentration were compared with values obtained for the control group of seeds, which were not treated with ZnCl 2. In addition to causing of inhibition of seed germination, the presence of zinc in the medium affects disorder of the physiological-biochemical processes during the growth and development of vegetative organs that it indicates the difference in the length of the root and shoot of treated seeds in relation to the control group of untreated seeds.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Zinc (ZN) on Germination of Wheat (Triticum AestivumL.)

Stanković

Topuzović

Marković

et al. 2010

Biotechnology & Biotechnological Equipment

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show abstract

“…When plants are exposed to stress, the stress induces the ROS that hurts the cell membrane system by overoxidating the fragile phospholipins in membrane and fatty acid in cytoplasm and changing the dimensional conformation and permeability of membrane proteins, thus, ultimately causing the death of cells [29,30]. Cadmium stress can also induce the production of oxygen free radicals and peroxide [16,31,32], which injure the photosynthetic apparatus and thus affect the photosynthesis [33,34]. The cadmium itself can cause cell damage through different pathways, such as interfering the water metabolism, decreasing the chlorophyll content, changing the permeability of cell membrane, reacting with hydrosulfide group of many proteins, contending for active site with other substrate, competing with other necessary nutrient elements, and changing DNA conformation [35].…”

Section: Discussionmentioning

confidence: 99%

The Metallothionein Gene, TaMT3, from Tamarix androssowii Confers Cd2+ Tolerance in Tobacco

Zhou

Yao

Wang

et al. 2014

IJMS

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Cadmium (Cd) is a nonessential microelement and low concentration Cd2+ has strong toxicity to plant growth. Plant metallothioneins, a class of low molecular, cystein(Cys)-rich and heavy-metal binding proteins, play an important role in both metal chaperoning and scavenging of reactive oxygen species (ROS) with their large number of cysteine residues and therefore, protect plants from oxidative damage. In this study, a metallothionein gene, TaMT3, isolated from Tamarix androssowii was transformed into tobacco (Nicotiana tobacum) through Agrobacterium-mediated leaf disc method, and correctly expressed under the control of 35S promoter. Under Cd2+ stress, the transgenic tobacco showed significant increases of superoxide dismutase (SOD) activity and chlorophyll concentration, but decreases of peroxidase (POD) activity and malondialdehyde (MDA) accumulation when compared to the non-transgenic tobacco. Vigorous growth of transgenic tobacco was observed at the early development stages, resulting in plant height and fresh weight were significantly larger than those of the non-transgenic tobacco under Cd2+ stress. These results demonstrated that the expression of the exogenous TaMT3 gene increased the ability of ROS cleaning-up, indicating a stronger tolerance to Cd2+ stress.

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“…Once concentration exceeded 5 µmol/L, the relative electron transport rate and photochemical efficiency of algal cells were also seriously inhibited [38]. However, Zn 2+ stress at 10 µmol/L not only inhibited the relative photosynthetic electron transfer efficiency, but also reduced the functionality of mitochondrial membranes and Chl a content, which ultimately affected algal growth and organic matter production [39]. Some laboratory experiments have depended on additions of carbon or high nutrients substrates to investigate DOM formation by microalgae or bacteria [40].…”

Section: Analysis Of Fluorescence Characteristicsmentioning

confidence: 99%

Response of Chlorophyll Fluorescence Characteristics and Dissolved Organic Matter for Marine Diatom Skeletonema dohrnii under Stress from Penicillin and Zn2+

Liu

Sun

2021

Plants

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Skeletonema dohrnii is a good model diatom for studying environmental stress and has promising applications and prospects in various fields. Antibiotics and heavy metals are commonly exceeded in the nearshore marine habitats. In this work, we investigated the effects of an antibiotic (penicillin, 2 µg/L) and a heavy metal ion (Zn2+, 10 µmol/L) stress on marine diatom S. dohrnii, mainly using excitation-emission matrices (EEMs) fluorescence methods and OJIP test. Results indicated that algal cells grown with the antibiotic showed higher biomass, specific growth rate, doubling time, chlorophyll a, and chlorophyll fluorescence variables. Moreover, excess zinc had negative effects on S. dohrnii. We found that zinc not only inhibited the relative photosynthetic electron transfer efficiency but also reduced the Chl a content, which ultimately affected algal growth and organic matter production. In addition, the combined effect of penicillin and Zn2+ further affected the physiological state of S. dohrnii. The dissolved organic matter (DOM) characteristics of the four cultures were also different, including fluorescence indices (fluorescence index, biological index, β/α, and humification index) and fluorescence peaks (peaks A, C, M and T). In brief, characterization of chlorophyll fluorescence characteristics and DOM-related variables are important for understanding the effects of environmental stress on microalgae.

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Untitled

Cited by 31 publications

References 11 publications

Influence of Zinc (ZN) on Germination of Wheat (Triticum AestivumL.)

Influence of Zinc (ZN) on Germination of Wheat (Triticum AestivumL.)

The Metallothionein Gene, TaMT3, from Tamarix androssowii Confers Cd2+ Tolerance in Tobacco

Response of Chlorophyll Fluorescence Characteristics and Dissolved Organic Matter for Marine Diatom Skeletonema dohrnii under Stress from Penicillin and Zn2+

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