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Effect of heavy metal pollution on mineral absorption in sunflower (Helianthus annuus L.) hybrids

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Aslam U., Ahmad I., Hussain M., Khan A., Ghani A., Mustafa I., Jalal S., Aqeel M. A., Asif S., Ahmed H.

Acta Physiologiae Plantarum

2014

tom 36

nr 01

The present study was conducted in a potted experiment to examine the effects of chromium pollution on absorption of mineral nutrients and some morphophysiological attributes of two sunflower (Helianthus annuus L.) hybrids (FH-331 and FH-259) in the presence and absence of ethylene diamine tetra acetic acid (EDTA) used as a chelating agent. Four concentrations of chromium (Cr³⁺) i.e., 0, 20, 30 and 40 mg kg⁻¹ with and without 0.3 g kg⁻¹ , EDTA as chelating agent were applied to 25-day-old sunflower plants. A gradually decreasing trend in absorption of all minerals and other parameters studied were observed. Different treatments of Cr³⁺ as well as Cr³⁺ and EDTA significantly reduced root and shoot fresh weight; however, root, shoot and achene Cr³⁺ contents of two sunflowers hybrids under higher chromium and EDTA stress varied significantly whereas movement of Cr³⁺ contents to leaves was non-significant. Absorption of Na⁺, K⁺, N₂ and P through roots and shoots significantly reduced with increasing concentration of Cr³⁺ treatments. In fact addition of EDTA to the medium further enhanced the toxicity of chromium.

Ograniczanie wyników

1 Acta Physiologiae Plantarum

1 Ahmad I.

1 Ahmed H.

1 Aqeel M. A.

1 Asif S.

1 Aslam U.

1 Ghani A.

1 Hussain M.

1 Jalal S.

1 Khan A.

1 Mustafa I.

1 2014

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Effect of heavy metal pollution on mineral absorption in sunflower (Helianthus annuus L.) hybrids