Tolerance of Two Hydroponically Grown<i>Salix</i>Genotypes to Excess Zinc

Vassilev, Andon; Pérez‐Sanz, Araceli; Cuypers, Ann; Vangronsveld, Jaco

doi:10.1080/01904160701555671

Cited by 19 publications

(12 citation statements)

References 22 publications

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“…Plants are not able to manage the excess of Zn by their physiological uptake systems, thus resulting in a serious threat to agricultural production (Vassilev et al 2007). …”

Section: Resultsmentioning

confidence: 99%

“…Zn accumulates in plant tissues, reaching toxic levels ([300 lg/g), and thus provoking physiological alterations and growth inhibition. These effects are caused, among other processes, by changes in carbohydrate metabolism (Foy et al 1978), decrease in the content of essential nutrients such as Fe, Cu and Mn (Sargadoy et al 2011), oxidative damage and the alteration of photosynthetic activity (Vassilev et al 2007). …”

Section: Introductionmentioning

confidence: 98%

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Roles of some nitrogenous compounds protectors in the resistance to zinc toxicity in Lactuca sativa cv. Phillipus and Brassica oleracea cv. Bronco

et al. 2015

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Roles of some nitrogenous compounds protectors in the resistance to zinc toxicity in Lactuca sativa cv. Phillipus and Brassica oleracea cv. Bronco Abstract Zinc (Zn) pollution in the soil represents a major problem for crop production worldwide. In the present work, two horticultural plants exhibiting different tolerance to Zn, Lactuca sativa cv. Phillipus and Brassica oleracea cv. Bronco, were exposed to Zn to evaluate the contribution of compatible osmolytes such as proline (Pro), glycine betaine (GB) and c-aminobutyric acid (GABA) in the mechanism(s) of tolerance to Zn stress. This study confirms the higher susceptibility of L. sativa to Zn stress: lettuce plants experienced a strong reduction in biomass, while the levels of Pro and GB increased. These results suggest that in L. sativa, the increase of Pro and GB does not represent a mechanism of resistance to toxicity, but it is likely a symptom of Zn stress. Conversely, in B. oleracea, a slight decrease in Pro levels, mainly catalysed by degradation through proline dehydrogenase, was observed; a similar behaviour affected GB levels. On the other hand, GABA synthesis was slightly, but significantly, increased. The presence of high levels of GABA in Zn-stressed B. oleracea would suggest that reactive oxygen species detoxification could be essential to improve the resistance to toxicity under metal stress conditions.

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“…Plants are not able to manage the excess of Zn by their physiological uptake systems, thus resulting in a serious threat to agricultural production (Vassilev et al 2007). …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Roles of some nitrogenous compounds protectors in the resistance to zinc toxicity in Lactuca sativa cv. Phillipus and Brassica oleracea cv. Bronco

et al. 2015

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“…The decline in chl content in plants exposed to heavy metal stress is believed to be due to inhibition of enzymes of chl biosynthetic such as δ-aminolaevulinic acid dehydratase and protochlorophyllide reductase (Mukhopadhyay et al 2013a). Reduction of pigments may be an integral result of disturbed biosynthesis or enhanced degradation of thylakoids (Vassilev et al 2007) under Zn stress. Furthermore, the destruction of chl by Zn stress could be due to peroxidation processes in the chloroplast membrane lipids by the ROS (Sandalio et al 2001) as our observation indicated.…”

Section: Discussionmentioning

confidence: 99%

Zinc stress induces physiological, ultra-structural and biochemical changes in mandarin orange (Citrus reticulata Blanco) seedlings

Subba

Mukhopadhyay

Mahato

et al. 2014

Physiol Mol Biol Plants

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“…However, anthropogenic activities such as mining, burning of fossil fuels, and agricultural practices have lead to Zn accumulation in soil (Nagajyoti et al, 2010 ). High Zn concentrations in soil and water can disturb physiological, biochemical, and metabolic processes leading to stunted plant growth by altering carbohydrate metabolism (Marschner, 2012 ) and photosynthesis, lowering the concentration of essential nutrients such as magnesium and iron (Sagardoy et al, 2010 ), causing oxidative damage to membranes, and interfering with DNA replication (Broadley et al, 2007 ; Vassilev et al, 2007 ).…”

Section: Introductionmentioning

confidence: 99%

Zinc Excess Triggered Polyamines Accumulation in Lettuce Root Metabolome, As Compared to Osmotic Stress under High Salinity

et al. 2016

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Abiotic stresses such as salinity and metal contaminations are the major environmental stresses that adversely affect crop productivity worldwide. Crop responses and tolerance to abiotic stress are complex processes for which “-omic” approaches such as metabolomics is giving us a newest view of biological systems. The aim of the current research was to assess metabolic changes in lettuce (Lactuca sativa L.), by specifically probing the root metabolome of plants exposed to elevated isomolar concentrations of NaCl and ZnSO4. Most of the metabolites that were differentially accumulated in roots were identified for stress conditions, however the response was more intense in plants exposed to NaCl. Compounds identified in either NaCl or ZnSO4 conditions were: carbohydrates, phenolics, hormones, glucosinolates, and lipids. Our findings suggest that osmotic stress and the consequent redox imbalance play a major role in determining lettuce root metabolic response. In addition, it was identified that polyamines and polyamine conjugates were triggered as a specific response to ZnSO4. These findings help improve understanding of how plants cope with abiotic stresses. This information can be used to assist decision-making in breeding programs for improving crop tolerance to salinity and heavy metal contaminations.

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Tolerance of Two Hydroponically GrownSalixGenotypes to Excess Zinc

Cited by 19 publications

References 22 publications

Roles of some nitrogenous compounds protectors in the resistance to zinc toxicity in Lactuca sativa cv. Phillipus and Brassica oleracea cv. Bronco

Roles of some nitrogenous compounds protectors in the resistance to zinc toxicity in Lactuca sativa cv. Phillipus and Brassica oleracea cv. Bronco

Zinc stress induces physiological, ultra-structural and biochemical changes in mandarin orange (Citrus reticulata Blanco) seedlings

Zinc Excess Triggered Polyamines Accumulation in Lettuce Root Metabolome, As Compared to Osmotic Stress under High Salinity

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