Oxidative Stress Induced by Iron inHydrilla verticillata(l.f.) Royle: Response ofAntioxidants

Sinha, Sarita; Gupta, Manisha; Prakāsh, Chandra

doi:10.1006/eesa.1997.1598

Cited by 80 publications

(38 citation statements)

References 30 publications

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“…Such concentration caused the plant necrosis or death, so no MDA or proline was generated anymore. Iron concentrations used in a plethora of researches were relatively not higher than that in this experiment [28,35,36].…”

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confidence: 54%

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Antioxidative responses of Elodea nuttallii (Planch.) H. St. John to short-term iron exposure

Xing

Liu

2010

Plant Physiology and Biochemistry

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contrasting

confidence: 54%

“…Excess iron, however, can result in toxicity, especially in altering chromatin structure, protein synthesis, enzyme activity, photosynthesis and respiration [8,28]. Furthermore, excess iron can stimulate the formation of free radials and reactive oxygen species (ROS) in plants [32,35].…”

Section: Introductionmentioning

confidence: 99%

Antioxidative responses of Elodea nuttallii (Planch.) H. St. John to short-term iron exposure

Xing

Liu

2010

Plant Physiology and Biochemistry

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“…These ions damaged membranes, DNA and proteins due to the production of the free radicals (Arora et al, 2002;De Dorlodot et al, 2005). Sinha et al (1997) reported that Iron toxicity is accompanied with increase of oxidative stress in several plants. As regard Zinc, the two species studied showed similar results as obtained for Fe.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Cd, Zn and Fe on Seed Germination and Early Seedling Growth of Wheat and Bean

Rasafi

Nouri

Bouda

et al. 2016

Ekológia (Bratislava)

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El Rasafi T., Nouri M., Bouda S., Haddioui A.: The effect of Cd, Zn and Fe on seed germination and early seedling growth of wheat and bean. Ekológia (Bratislava), Vol. 35, No. 3, p. 213-223, 2016. This study was conducted to evaluate the effect of metals on wheat and bean species. The method uses seed germination and early seedling growth of these plants in the presence of various levels (10, 50, 100, 250, 500, 750 and 1000 mg/L) of Cadmium (Cd), Iron (Fe) and Zinc (Zn). The inhibition caused by these metals was depending on the concentration used, the metal itself and the plant species. The species had reduced seed germination, root and shoot lengths, tolerance index and percentphyto-toxicity with increasing concentrations of metals. Cadmium was determined to be the most inhibitory metal on these parameters. This metal affected significantly the germination, root and shoot length of the species tested, as well as the tolerance index and percentphytotoxicity starting from 50 mg Cd/l. Under the Iron stress, in general, the inhibition of germination and root length of wheat was reduced from 500 mg Fe/l. The results showed also that the inhibitory effect of increase of Zn levels was seen in root, shoot and tolerance indices. The findings also revealed that the metal toxicity was as follow: Cd > Fe > Zn. Regarding species, the results showed that bean seemed to be more tolerant to the increase of the three metals than wheat.

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“…Like other transition metals, Fe can cause oxidative stress in plant cells (e.g. Sinha et al, 1997). Caro and Puntarulo (1996) observed that the addition of Fe-EDTA in vivo up to an exogenous concentration of 5 ϫ 10 Ϫ4 m gives rise to an increase in the Fe content of the tissues accompanied by oxidative stress in the roots of soybean (Glycine max).…”

Section: Stress Cell Morphology Division Rate and Formation Of Thementioning

confidence: 99%

The Role of Auxin, pH, and Stress in the Activation of Embryogenic Cell Division in Leaf Protoplast-Derived Cells of Alfalfa

et al. 2002

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Culturing leaf protoplast-derived cells of the embryogenic alfalfa (Medicago sativa subsp. varia A2) genotype in the presence of low (1 m) or high (10 m) 2, 4-dichlorophenoxyacetic acid (2,4-D) concentrations results in different cell types. Cells exposed to high 2,4-D concentration remain small with dense cytoplasm and can develop into proembryogenic cell clusters, whereas protoplasts cultured at low auxin concentration elongate and subsequently die or form undifferentiated cell colonies. Fe stress applied at nonlethal concentrations (1 mm) in the presence of 1 m 2,4-D also resulted in the development of the embryogenic cell type. Although cytoplasmic alkalinization was detected during cell activation of both types, embryogenic cells could be characterized by earlier cell division, a more alkalic vacuolar pH, and nonfunctional chloroplasts as compared with the elongated, nonembryogenic cells. Buffering of the 10 m 2,4-D-containing culture medium by 10 mm 2-(N-morpholino)ethanesulfonic acid delayed cell division and resulted in nonembryogenic cell-type formation. The level of endogenous indoleacetic acid (IAA) increased transiently in all protoplast cultures during the first 4 to 5 d, but an earlier peak of IAA accumulation correlated with the earlier activation of the division cycle in embryogenic-type cells. However, this IAA peak could also be delayed by buffering of the medium pH by 2-(N-morpholino)ethanesulfonic acid. Based on the above data, we propose the involvement of stress responses, endogenous auxin synthesis, and the establishment of cellular pH gradients in the formation of the embryogenic cell type.One of the characteristics of plant development is that somatic cell differentiation is reversible. This can be best demonstrated in in vitro systems where somatic plant cells can regain their totipotency and form embryos through the developmental pathway of somatic embryogenesis. Somatic embryo formation resembles zygotic embryogenesis in many aspects (for review, see Dodeman et al., 1997). However, beside the similarities, there are obvious differences: For example, whereas zygotes formed by the fusion of the egg and sperm cells are clearly determined to follow embryogenic development, somatic cells have to acquire competence to be able to respond to embryogenic signals and initiate embryogenesis. In carrot (Daucus carota), embryogenic cells of the proembryogenic cell mass are small, densely cytoplasmed, and full of starch grains, whereas nonembryogenic callus cells are large and highly vacuolated. This can be generalized for most embryogenic systems, including alfalfa (Medicago sativa), where protoplast-derived cells cultured at different 2, 4-dichlorophenoxyacetic acid (2,4-D) concentrations can develop into embryogenic or nonembryogenic cell types with the above characteristic morphologies (Bö gre et al., 1990; Dudits et al., 1991). Komamine (1985, 1995) showed that isolated, small, cytoplasm-rich carrot cells have the ability to develop to somatic embryos and go through an unequal first divisio...

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Oxidative Stress Induced by Iron inHydrilla verticillata(l.f.) Royle: Response ofAntioxidants

Cited by 80 publications

References 30 publications

Antioxidative responses of Elodea nuttallii (Planch.) H. St. John to short-term iron exposure

Antioxidative responses of Elodea nuttallii (Planch.) H. St. John to short-term iron exposure

The Effect of Cd, Zn and Fe on Seed Germination and Early Seedling Growth of Wheat and Bean

The Role of Auxin, pH, and Stress in the Activation of Embryogenic Cell Division in Leaf Protoplast-Derived Cells of Alfalfa

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