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Oczyszczanie i immunogenne właściowsći erytropetyny krwi

100%

Baciu I., Dorofteju A., Vasile V.

Acta Physiologica Polonica

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1971

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tom 22

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nr 6

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Heavy metal-induced differential responses to oxidative stress and protection by mycorrhization in sunflowers grown in lab and field scales

88%

Paun A., Neagoe A., Paun M., Baciu I., Iordache V.

Polish Journal of Environmental Studies

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2015

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tom 24

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nr 3

The influence of arbuscular mycorrhizal (AM) fungi (Glomus intraradices) and of heavy metal stress on the characteristics of biomass production, as well as non-enzymatic and enzymatic variables in the roots, shoots, and leaves of sunflower (Helianthus annuus L.) plants were studied at pot and field scales. The intensity of the mycorrhizal colonization (M%) and the arbuscular abundance in the root system (A%) were found to be higher in the sunflower grown at lab scale (artificially inoculated) than that grown at field scale (natively inoculated). Thus, the AM symbiosis with the sunflower root system exposed to a different degree of pollution had a differential protective effect on plants at lab and field scales. A huge biomass of sunflower was harvested from the field compared to that obtained from the lab experiment. Furthermore, after measuring the biochemical variables of the plant parts, the results indicated a decrease in field for the superoxide dismutase and peroxidase activity, for the lipid peroxidation content, and for the assimilating pigments, while all quantified variables showed almost the same pattern of variation in all three plant parts. Consequently, it can be concluded that it is possible to use biochemical response variables, which in the case of our study are consistent with the protective effect of the fungus, as environmental biomarkers for soils with moderate pollution.

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Response of oxidative stress variables, proteins, and chlorophyll in three plant species caused by moderate soil pollution with toxic elements

88%

Paun A., Neagoe A., Paun M., Baciu I., Iordache V.

Polish Journal of Environmental Studies

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2015

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tom 24

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nr 3

The ecotoxicological effects in the field can be directly assessed by measuring the concentration of the pollutant in soil or plant samples, and also by measuring response variables such as biochemical ones. However, there are few such studies integrating data on pollutants and plant biochemical variables and there is a knowledge gap about how dominant species in various ecological contexts respond in all their plant parts to heavy metal stress by changing biochemical variables. In this context, the objective of the research reported here is to describe how select biochemical variables varied in three plant parts of three plant species sampled from two areas with different levels of pollution. It was also of interest to identify to what extent they could be used in the non-destructive routine monitoring of pollution in industrial areas. We found a systematic decrease of chlorophylls and carotenoids in the aboveground parts of all species, and an increase of protein concentrations in all species and plant parts coupled with a decrease of superoxide dismutase and peroxidase activity. Although these patterns were correlated with a decrease of toxic element concentrations, both as pseudo-total and available forms in all plant parts, we cannot conclude that only a change in toxic elements pollution led to the observed patterns, because P nutrition also differed between plants. A further key direction of research is to clarify how the available major nutrients (N, P) modulate bioaccumulation of toxic elements and what effects they might have on biochemical variables of plants, in particular on oxidative stress.

Ograniczanie wyników

2 Polish Journal of Environmental Studies

1 Acta Physiologica Polonica

3 Baciu I.

2 Iordache V.

2 Neagoe A.

2 Paun A.

2 Paun M.

1 Dorofteju A.

1 Vasile V.

2 2015

1 1971

Oczyszczanie i immunogenne właściowsći erytropetyny krwi

Heavy metal-induced differential responses to oxidative stress and protection by mycorrhization in sunflowers grown in lab and field scales

Response of oxidative stress variables, proteins, and chlorophyll in three plant species caused by moderate soil pollution with toxic elements