Subcellular localization and responses of superoxide dismutase isoforms in local wheat varieties subjected to continuous soil drought

Huseynova, Irada; Aliyeva, D. R.; Aliyev, Jalal A.

doi:10.1016/j.plaphy.2014.01.018

Cited by 72 publications

(44 citation statements)

References 35 publications

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“…Heavy metals present at elevated levels may cause an increased production of reactive oxygen species (ROS) in plant cells on one hand [42][43][44][45][46][47][48][49][50][51] and may be involved in the enzymatic detoxification of ROS on the other hand [2,3,42,[52][53][54]. Stresses (e.g., drought, heat and high light intensity) may also cause an accumulation of ROS and of ROS-damaged cell constituents [54,55].…”

Section: Heavy Metals: Micronutrients or Pollutants?mentioning

confidence: 99%

“…These findings underline the importance of heavy metal homeostasis for plant cells. Several forms of superoxide dismutases are present in plants: Cu/Zn superoxide dismutases (usually present under several forms) were reported to be present in various subcellular compartments, while Mn superoxide dismutase isoforms were localized in the mitochondria and Fe superoxide dismutase was reported to be a plastidial enzyme [1,2,54]. Especially Mn superoxide dismutase activity was found to be increased under drought stress [54].…”

Section: Heavy Metals: Micronutrients or Pollutants?mentioning

confidence: 99%

“…A transporter for the copper-nicotianamine complex was found to be located in the phloem of rice leaves and was proposed to be important for the translocation of Cu from leaves to developing organs and maturing seeds [78]. 65 Zn, 109 Cd, 63 Ni, 59 Fe, 54 Mn and 57 Co are based on autoradiographs with various plant species emphasizing important findings. The following processes are involved in generating these radionuclide-specific distribution patterns: insolubilization at the roots surface and in the root apoplast (A); uptake and loading into the root xylem (B); uptake and retention in root cells (C); basipetal transport to the roots via the phloem (D); cell-to-cell transport in meristems and regions without functional phloem (E); transport with the transpiration stream in the xylem to mesophyll cells (F); transfer from xylem to phloem via transfer cells in small bundles (G); and remobilization from senescing leaves and transport to sinks via the phloem (H).…”

Section: Redistribution Via the Phloemmentioning

confidence: 99%

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Heavy Metals in Crop Plants: Transport and Redistribution Processes on the Whole Plant Level

2015

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Abstract:Copper, zinc, manganese, iron, nickel and molybdenum are essential micronutrients for plants. However, when present in excess they may damage the plant or decrease the quality of harvested plant products. Some other heavy metals such as cadmium, lead or mercury are not needed by plants and represent pollutants. The uptake into the roots, the loading into the xylem, the acropetal transport to the shoot with the transpiration stream and the further redistribution in the phloem are crucial for the distribution in aerial plant parts. This review is focused on long-distance transport of heavy metals via xylem and phloem and on interactions between the two transport systems. Phloem transport is the basis for the redistribution within the shoot and for the accumulation in fruits and seeds. Solutes may be transferred from the xylem to the phloem (e.g., in the small bundles in stems of cereals, in minor leaf veins). Nickel is highly phloem-mobile and directed to expanding plant parts. Zinc and to a lesser degree also cadmium are also mobile in the phloem and accumulate in meristems (root tips, shoot apex, axillary buds). Iron and manganese are characterized by poor phloem mobility and are retained in older leaves.

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Section: Heavy Metals: Micronutrients or Pollutants?mentioning

confidence: 99%

Section: Heavy Metals: Micronutrients or Pollutants?mentioning

confidence: 99%

Section: Redistribution Via the Phloemmentioning

confidence: 99%

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Heavy Metals in Crop Plants: Transport and Redistribution Processes on the Whole Plant Level

2015

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“…The function of the dehydrin family is not completely understood, but these proteins are involved in conferring stress tolerance (Kosová et al, 2014). Catalases and superoxide dismutases are primary antioxidant enzymes involved in the elimination of reactive oxygen species (ROS) such as the cytotoxic H 2 O 2 produced by photorespiration (Luna et al, 2005) and the superoxide generated during photosynthetic electron transport (Xu et al, 2010; Huseynova et al, 2014). Thus, our study combines the effects of genotypic variability and future environmental conditions, integrating plant performance with gene expression, and aims to identify traits associated with better performance during vegetative growth.…”

Section: Introductionmentioning

confidence: 99%

Interactive Effects of Elevated [CO2] and Water Stress on Physiological Traits and Gene Expression during Vegetative Growth in Four Durum Wheat Genotypes

et al. 2016

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The interaction of elevated [CO2] and water stress will have an effect on the adaptation of durum wheat to future climate scenarios. For the Mediterranean basin these scenarios include the rising occurrence of water stress during the first part of the crop cycle. In this study, we evaluated the interactive effects of elevated [CO2] and moderate to severe water stress during the first part of the growth cycle on physiological traits and gene expression in four modern durum wheat genotypes. Physiological data showed that elevated [CO2] promoted plant growth but reduced N content. This was related to a down-regulation of Rubisco and N assimilation genes and up-regulation of genes that take part in C-N remobilization, which might suggest a higher N efficiency. Water restriction limited the stimulation of plant biomass under elevated [CO2], especially at severe water stress, while stomatal conductance and carbon isotope signature revealed a water saving strategy. Transcript profiles under water stress suggested an inhibition of primary C fixation and N assimilation. Nevertheless, the interactive effects of elevated [CO2] and water stress depended on the genotype and the severity of the water stress, especially for the expression of drought stress-responsive genes such as dehydrins, catalase, and superoxide dismutase. The network analysis of physiological traits and transcript levels showed coordinated shifts between both categories of parameters and between C and N metabolism at the transcript level, indicating potential genes and traits that could be used as markers for early vigor in durum wheat under future climate change scenarios. Overall the results showed that greater plant growth was linked to an increase in N content and expression of N metabolism-related genes and down-regulation of genes related to the antioxidant system. The combination of elevated [CO2] and severe water stress was highly dependent on the genotypic variability, suggesting specific genotypic adaptation strategies to environmental conditions.

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“…Among the three isoforms of SOD, Cu/Zn-sod is localized in all subcellular fractions, Mn-sod was found in the mitochondrial and Fe-sod in the chloroplast [36]. The isoforms of APX existed in thylakoid, stroma and cytosol whereas plants CATs have been grouped into three different classes, catA, catB and catC [21].…”

Section: Expression Profile Of Each Of the Antioxygenic Isoenzymesmentioning

confidence: 99%

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2017

RJLBPCS

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Mitigating effect of exogenous spermidine (Spd) treatment on the reactive oxygen species (ROS) scavenging system in response to salinity has been investigated in root and shoot tissues of two Indica rice varieties, namely IR 36 (salt sensitive) and Nonabokra (salt-tolerant). Rice seedlings (5-Day old) were grown in 150mM sodium chloride (NaCl) in presence or absence of 1 mM Spd for 16 h and stress-evoked change in physiological parameters, accumulation of H2O2 content, gene expression and biochemical activities of three antioxidative enzymes, such as, catalase, ascorbate peroxidase and superoxide dismutase were determined. Plant growth retardation in terms of chlorophyll degradation, reduction in carotenoid content and enhanced anthocyanin content during salinity exposure were rescued due to external Spd supplementation.Moreover, exogenous application of Spd differentially influenced the antioxidative enzymes systems in root and shoot tissues of two rice cultivars of different sensitivity towards salt stress. The gene expression analyses of different antioxidative isoenzymes revealed that different isoforms of a particular antioxidative enzyme contributed unequally to make a direct correlation with their cumulative enzymes activities. In addition to that some in silico structural attributes including 3D protein structure, active site and ligand site prediction have added additional information on our existing knowledge that will be beneficial for the future investigation on the specific potential roles of different isoforms of those anti-oxygenic enzymes in stress management.

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Subcellular localization and responses of superoxide dismutase isoforms in local wheat varieties subjected to continuous soil drought

Cited by 72 publications

References 35 publications

Heavy Metals in Crop Plants: Transport and Redistribution Processes on the Whole Plant Level

Heavy Metals in Crop Plants: Transport and Redistribution Processes on the Whole Plant Level

Interactive Effects of Elevated [CO2] and Water Stress on Physiological Traits and Gene Expression during Vegetative Growth in Four Durum Wheat Genotypes

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