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Zawartosc metali ciezkich jako kryterium oceny jakosci ziarna zyta ozimego

100%

Bednarek W., Tkaczyk P., Dresler A.

Zeszyty Problemowe Postępów Nauk Rolniczych

2006

tom 512

nr 1

47-54

In the areas of winter rye cultivation in Lublin region, samples of winter rye grain and soil were collected for analysis. The study aimed at assessment of winter rye grain quality on the basis oil heavy metals (lead, cadmium, nickel, zinc, copper, arsenic and mercury) contents and finding the correlation among these heavy metals and some properties of soil and plant. Heavy metals contents were not significantly affected by the soil on which the rye was grown. None of the tested features did indicate significant relationship with the contents of these metals in grain. Dependence of heavy metals contents in grain on some elements occurring in this part of plant was significantly positive. This was indicated by statistical analysis showing that determination coefficients ranged within 5.5-40.4%. Multiple regression equations enable to forecast direction of changes in the contents of particular metals in grain as a consequence of occurring other elements in this part of plant. Contents of heavy metals in winter rye grain (0.156 mg Pb, 0.035 mg Cd, 0.503 mg Ni, 30.3 mg Zn, 3.168 mg Cu, 0.011 mg As, 0.00029 mg Hg·kg⁻¹ fresh matter) indicate that it was safe and didn’t exceed the upper threshold of contamination typical for products of this type.

Accumulation of low-molecular-weight organic acids in roots and leaf segments of Zea mays plants treated with cadmium and copper

100%

Dresler A., Hanaka A., Bednarek W., Maksymiec W.

Acta Physiologiae Plantarum

2014

tom 36

nr 06

Maize seedlings grown in a nutrient solution were treated with Cd (50, 100 μM) or Cu (50, 100 μM). Roots and separated leaf sections (from the youngest–– basal, through the middle––mature, to the oldest––apical) were analysed. Shoot and root fresh weight, and root net growth rates were reduced significantly after Cu application in comparison to Cd. Copper (50, 100 μM) and cadmium (100 μM) decreased the sum of chlorophyll and total carotenoid pools mostly in mature and old leaf sections. The concentration of Cu and Cd increased in the old and mature leaf sections. Analysis of organic acids showed that both metals differently influenced the lowmolecular-weight organic acids (LMWOAs) content in maize leaf sections. In mature sections, the excess Cu increased the succinate and tartrate contents, whereas in the young ones mainly the tartrate level was elevated. Cadmium elevated citrate accumulation in mature and old sections, compared to the control plants. Malate, the main LMWOA in maize leaves, increased only after addition of 100 μM of Cd (mature and old sections) or 50 μM of Cu (old sections). Analysis of LMWOAs in roots showed that the excess of Cd or Cu induced higher accumulation of tartrate and malate and, additionally, copper increased the citrate content.

Ograniczanie wyników

1 Acta Physiologiae Plantarum

1 Zeszyty Problemowe Postępów Nauk Rolniczych

2 Bednarek W.

2 Dresler A.

1 Hanaka A.

1 Maksymiec W.

1 Tkaczyk P.

1 2014

1 2006

Wyniki wyszukiwania

Zawartosc metali ciezkich jako kryterium oceny jakosci ziarna zyta ozimego

Accumulation of low-molecular-weight organic acids in roots and leaf segments of Zea mays plants treated with cadmium and copper