Arbuscular mycorrhizal effect on heavy metal uptake of ryegrass (Lolium p erenne L.) in pot culture with polluted soils

Takács, Tünde; Bíró, Borbála; Vörös, I.

doi:10.1007/0-306-47624-x_232

Cited by 14 publications

(9 citation statements)

References 3 publications

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“…3 and 4). Among these parameters, the total root length was more sensitive than the shoot length at all the lead concentrations used, as was previously reported (Baker and Walker, 1989;Kahle, 1993;Takács et al, 2001;Nadia et al, 2002). The results in Figure 5 and Table 2 show that as the lead concentration increased the proline content also increased, reaching the highest value at 2.5 mM, then slightly decreasing at the two highest concentrations used.…”

Section: Resultssupporting

confidence: 79%

Effect of lead stress on the growth and metabolism of Eruca sativa M. seedlings

Faheed

2005

Acta Agronomica Hungarica

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Among the toxic elements, lead has great importance because of its harmful effects on animal and human health. Heavy metals are known as growth inhibitors and consequently exhibit toxicity symptoms in plants. The effect of different concentrations of lead on seed germination, seedling growth and some metabolites of Eruca sativa plants was examined. The percentage of seed germination gradually decreased with an increase in the lead concentration. A considerable reduction in fresh and dry matter as well as shoot and root length was obtained as a result of increasing lead concentration. Among these parameters, total root length was a more sensitive parameter than shoot length at every lead concentration. The proline content increased, in most cases, with increasing lead concentration. The same trend was observed for the free amino acid content. Soluble protein generally increased with an increase in lead concentration. In contrast, the total protein gradually decreased as the lead concentration increased, particularly at the highest levels used.

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Section: Resultssupporting

confidence: 79%

Effect of lead stress on the growth and metabolism of Eruca sativa M. seedlings

Faheed

2005

Acta Agronomica Hungarica

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“…Concentrations (mg g −1 ) of N (micro‐Kjeldahl) and P in shoots were colorimetrically measured on an autoanalyzer according to Mingorance (2002) and K was determined by flame photometry. Shoot Pb, Cd, Ni and Zn ( μ g g −1 ) were determined (from three different measurements made on a pooled sample containing the five replicate pots per treatment) after wet digestion of the air‐dried plant samples with HNO 3 + H 2 O 2 by inductively coupled plasma atomic emission spectrometry (ICP‐AES), as described by Takács et al. (2001).…”

Section: Methodsmentioning

confidence: 99%

Effectiveness of autochthonous bacterium and mycorrhizal fungus on Trifolium growth, symbiotic development and soil enzymatic activities in Zn contaminated soil

et al. 2006

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Aims: This study investigates how autochthonous micro‐organisms [bacterium and/or arbuscular mycorrhizal (AM) fungi] affected plant tolerance to Zn contamination. Methods and Results: Zinc‐adapted and ‐nonadapted Glomus mosseae strains protected the host plant against the detrimental effect of Zn (600 μg g−1). Zn‐adapted bacteria increased root growth and N, P nutrition in plants colonized by adapted G. mosseae and decreased the specific absorption rate (SAR) of Cd, Cu, Mo or Fe in plants colonized by Zn‐nonadapted G. mosseae. Symbiotic structures (nodule number and extraradical mycelium) were best developed in plants colonized by those Zn‐adapted isolates that were the most effective in increasing plant Zn tolerance. The bacterium also increased the quantity and quality (metabolic characteristics) of mycorrhizal colonization, with the highest improvement for arbuscular vitality and activity. Inocula also enhanced soil enzymatic activities (dehydrogenase, β‐glucosidase and phosphatase) and indol acetic acid (IAA) accumulation, particularly in the rhizosphere of plants inoculated with Zn‐adapted isolates. Conclusions: Glomus mosseae strains have a different inherent potential for improving plant growth and nutrition in Zn‐contaminated soil. The bacterium increased the potential of mycorrhizal mycelium as inoculum. Significance and Impact of the Study: Mycorrhizal performance, particularly that of the autochthonous strain, was increased by the bacterium and both contributed to better plant growth and establishment in Zn‐contaminated soils.

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“…It was shown that in ryegrass ( Lolium perenne L.), which has a symbiotic relationship with AM, the translocation of Cd, Ni, and Zn from soil to different parts of the plant was significantly reduced as a result of immobilization of HMs in soil [ 228 ]. The same result was obtained by Shivakumar et al [ 229 ] when working with green gram ( Vigna radiata ) grown in soil containing excessive Zn.…”

Section: Some Defense Mechanisms Employed By Plants Against Hm Strmentioning

confidence: 99%

Heavy Metal Stress and Some Mechanisms of Plant Defense Response

Emamverdian

Ding

Mokhberdoran

et al. 2015

The Scientific World Journal

836

310

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Unprecedented bioaccumulation and biomagnification of heavy metals (HMs) in the environment have become a dilemma for all living organisms including plants. HMs at toxic levels have the capability to interact with several vital cellular biomolecules such as nuclear proteins and DNA, leading to excessive augmentation of reactive oxygen species (ROS). This would inflict serious morphological, metabolic, and physiological anomalies in plants ranging from chlorosis of shoot to lipid peroxidation and protein degradation. In response, plants are equipped with a repertoire of mechanisms to counteract heavy metal (HM) toxicity. The key elements of these are chelating metals by forming phytochelatins (PCs) or metallothioneins (MTs) metal complex at the intra- and intercellular level, which is followed by the removal of HM ions from sensitive sites or vacuolar sequestration of ligand-metal complex. Nonenzymatically synthesized compounds such as proline (Pro) are able to strengthen metal-detoxification capacity of intracellular antioxidant enzymes. Another important additive component of plant defense system is symbiotic association with arbuscular mycorrhizal (AM) fungi. AM can effectively immobilize HMs and reduce their uptake by host plants via binding metal ions to hyphal cell wall and excreting several extracellular biomolecules. Additionally, AM fungi can enhance activities of antioxidant defense machinery of plants.

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Arbuscular mycorrhizal effect on heavy metal uptake of ryegrass (Lolium p erenne L.) in pot culture with polluted soils

Cited by 14 publications

References 3 publications

Effect of lead stress on the growth and metabolism of Eruca sativa M. seedlings

Effect of lead stress on the growth and metabolism of Eruca sativa M. seedlings

Effectiveness of autochthonous bacterium and mycorrhizal fungus on Trifolium growth, symbiotic development and soil enzymatic activities in Zn contaminated soil

Heavy Metal Stress and Some Mechanisms of Plant Defense Response

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