Effect of lead and cadmium on germination and seedling growth of &lt;i&gt;Leucaena leucocephala&lt;/i&gt;

Shafiq, Muhammad; Iqbal, M. Zafar; Armin, Mohammad Ali

doi:10.4314/jasem.v12i3.55497

Cited by 54 publications

(56 citation statements)

References 13 publications

(8 reference statements)

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“…A possible explanation could be ascribed to the reduction in mitotic cells of the root meristematic zone. A similar phenomenon was observed in a previous study on the effect of lead and cadmium on the growth of Leucaena leucocephala seedlings [38]. At 10 mM, seedling growth was severely retarded and short browning roots were observed in Pb and Zn treatments.…”

Section: Discussionsupporting

confidence: 89%

Magnetic (Fe3O4) Nanoparticles Reduce Heavy Metals Uptake and Mitigate Their Toxicity in Wheat Seedling

et al. 2017

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Heavy metal pollution is not only a hazard to living organisms but also an important worldwide environmental concern. Experiments were performed to investigate the physiological mechanisms of magnetic (Fe 3 O 4 ) nanoparticles (nano-Fe 3 O 4 ) mitigation of the toxicity of heavy metals (Pb, Zn, Cd and Cu) in wheat seedlings. All the Petri dishes with germinating seedlings (1d) were covered, sealed with parafilm, and placed in a dark growth chamber. All parameters (seedling growth inhibition, heavy metal accumulation, enzymatic activities, and reducing effects of nano-Fe 3 O 4 on heavy metal toxicity) were analyzed only after five days. The results showed that the tested heavy metals significantly affected the growth of wheat seedling by decreasing root length, shoot length and even death at 10 mM concentration in the case of Cd and Cu. Heavy metals exposure also showed that superoxide dismutase (SOD) and peroxidases (POD) activities decreased significantly when the malondialdehyde (MDA) content was significantly higher in wheat seedlings. Addition of magnetic (Fe 3 O 4 ) nanoparticles (2000 mg/L) in each heavy metal solution (1 mM) significantly decreased the growth inhibition and activated protective mechanisms to reduce oxidative stress induced by heavy metals in the wheat seedlings. The reducing effects of nano-Fe 3 O 4 against heavy metals stress could be dependent on the increase in the enzyme activity (SOD and POD). Their protective role was confirmed by the decrease in MDA content. The alleviating effect of nano-Fe 3 O 4 is associated with their adsorption capacity of heavy metals.

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Section: Discussionsupporting

confidence: 89%

Magnetic (Fe3O4) Nanoparticles Reduce Heavy Metals Uptake and Mitigate Their Toxicity in Wheat Seedling

et al. 2017

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“…The results showed that the Cd was found to be the most toxic metal for wheat crop. This was also found in wheat and other species by other authors (Mathur et al, 1987;Iqbal, Mehmood, 1991;Shafiq et al, 2008;Moosavi et al, 2012;Shaikh et al, 2013). Regarding Iron, root and shoot length of wheat decreased significantly at the highest concentrations of Iron, when compared with the control.…”

Section: Discussionsupporting

confidence: 80%

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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“…Some previous studies have proved that higher Cd levels imposed adverse effect on seed germination resulted in retarded plant growth (Shafiq et al, 2008;Aydinalp and Marinova, 2009;Zhang et al, 2012) as in alfalfa seeds (Peralta et al, 2001). Cd interference changes the permeability of cell membrane which lessened absorption and transport of water as well as reduced the stress tolerance potential during germination (Russak et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Exogenous Application of Ethylenediaminetetraacetic Acid and Oxalic Acid Improve the Seed Germination and Enzymes Activities of Sunflower (Helianthus annuus) Under Cadmium Stress

Sadiq¹,

Hussain²,

Ashraf³

et al. 2015

IJAB

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To cite this paper: Sadiq, R., M. Hussain, M. Ashraf and K.U. Rehman, 2015. Exogenous application of ethylenediaminetetraacetic acid and oxalic acid improve the seed germination and enzymes activities of sunflower (Helianthus annuus) under cadmium stress. AbstractThe study was conducted to examine the deleterious effects of cadmium (Cd) on metabolic enzymes and their end products during seed germination and the effect of ethylenediaminetetraacetic acid (EDTA) and oxalic acid (OA) in easing the Cd toxicity in two sunflower hybrids (Hysun-33 and FH-533). To accomplish this, a pot experiment was carried out in small sandfilled plastic pots under normal environment temperature (28±2ºC). Seeds of both sunflower hybrids were exposed to Cd levels (250 and 450 mg/kg) alone and in combination of optimized level of chelating agents EDTA and OA (each at the rate of 1g/kg) at the time of sowing. The enzymes activities of two germinating hybrids were recorded over time from 24 to 120 h after sowing. When Cd was applied alone it reduced the germination rate, enzymes activities and total soluble sugars contents. Mobilization of stored proteins and amino acids were also suppressed in germinating seeds of both hybrids. However, application of EDTA and OA in combination with Cd improved the germination rate of seeds by surpassing the biochemical metabolism and enhanced the activities of α-amylase and protease revealing the ameliorating effect to Cd toxicity. Results revealed that minimum values of all the attributes are obtained at 450 mg/kg of Cd level, while chelators treatments proved effective in relieving Cd stress of which OA had 10% more pronounced germination percentage than EDTA and 30% more as compared to control. Interactive studies showed that both the chelators detoxify the 250 mg/kg of Cd more as compared to 450 mg/kg of Cd. Results clearly indicated that sunflower hybrid Hysun-33 showed greater activities of two hydrolyzing enzymes and efficient mobilization of reserved sugars and proteins than hybrid FH-533 under Cd stress, so it can be grown on Cd contaminated soils for higher plant productivity. Thereafter EDTA and OA could be supportive to improve the seed germination security in Cd polluted soil.

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Effect of lead and cadmium on germination and seedling growth of <i>Leucaena leucocephala</i>

Cited by 54 publications

References 13 publications

Magnetic (Fe3O4) Nanoparticles Reduce Heavy Metals Uptake and Mitigate Their Toxicity in Wheat Seedling

Magnetic (Fe3O4) Nanoparticles Reduce Heavy Metals Uptake and Mitigate Their Toxicity in Wheat Seedling

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

Exogenous Application of Ethylenediaminetetraacetic Acid and Oxalic Acid Improve the Seed Germination and Enzymes Activities of Sunflower (Helianthus annuus) Under Cadmium Stress

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