Effects of untreated and treated wastewater at the morphological, physiological and biochemical levels on seed germination and development of sorghum (Sorghum bicolor (L.) Moench), alfalfa (Medicago sativa L.) and fescue (Festuca arundinacea Schreb.)

Rekik, Imen; Chaabane, Zayneb; Missaoui, Amara; Bouket, Ali Chenari; Luptáková, Lenka; Elleuch, Amine; Belbahri, Lassaâd

doi:10.1016/j.jhazmat.2016.12.033

Cited by 47 publications

(45 citation statements)

References 33 publications

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“…Genome mining of the different strains of B. amyloliquefaciens allowed the discovery of numerous features documented in earlier studies as efficient factors of the interaction between host plants and the associated B. amyloliquefaciens strains (Niazi et al, 2014 ; Zhang, N. et al, 2016 ). These features allow nutrient acquisition, PGPR fitness, root colonization and growth promotion factors, plant growth promoting traits (hormones), plant protection from oxidative stress, plant induction of disease resistance, antibiotics and related compounds, resistance to drugs and heavy metals and degradation of aromatic compounds (Bruto et al, 2014 ; Niazi et al, 2014 ; Chen et al, 2016 ; Zhang, N. et al, 2016 ; Rekik et al, 2017 ). All these features were present in approximately all the genomes analyzed independently of whether these strains are represented by a complete coverage of the genome or their association to the plant rhizosphere.…”

Section: Discussionmentioning

confidence: 99%

Comparative Genomics of Bacillus amyloliquefaciens Strains Reveals a Core Genome with Traits for Habitat Adaptation and a Secondary Metabolites Rich Accessory Genome

Belbahri

Bouket

Rekik³

et al. 2017

Front. Microbiol.

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The Gram positive, non-pathogenic endospore-forming soil inhabiting prokaryote Bacillus amyloliquefaciens is a plant growth-promoting rhizobacterium. Bacillus amyloliquefaciens processes wide biocontrol abilities and numerous strains have been reported to suppress diverse bacterial, fungal and fungal-like pathogens. Knowledge about strain level biocontrol abilities is warranted to translate this knowledge into developing more efficient biocontrol agents and bio-fertilizers. Ever-expanding genome studies of B. amyloliquefaciens are showing tremendous increase in strain-specific new secondary metabolite clusters which play key roles in the suppression of pathogens and plant growth promotion. In this report, we have used genome mining of all sequenced B. amyloliquefaciens genomes to highlight species boundaries, the diverse strategies used by different strains to promote plant growth and the diversity of their secondary metabolites. Genome composition of the targeted strains suggest regions of genomic plasticity that shape the structure and function of these genomes and govern strain adaptation to different niches. Our results indicated that B. amyloliquefaciens: (i) suffer taxonomic imprecision that blurs the debate over inter-strain genome diversity and dynamics, (ii) have diverse strategies to promote plant growth and development, (iii) have an unlocked, yet to be delimited impressive arsenal of secondary metabolites and products, (iv) have large number of so-called orphan gene clusters, i.e., biosynthetic clusters for which the corresponding metabolites are yet unknown, and (v) have a dynamic pan genome with a secondary metabolite rich accessory genome.

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Section: Discussionmentioning

confidence: 99%

Comparative Genomics of Bacillus amyloliquefaciens Strains Reveals a Core Genome with Traits for Habitat Adaptation and a Secondary Metabolites Rich Accessory Genome

Belbahri

Bouket

Rekik³

et al. 2017

Front. Microbiol.

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“…Seed germination, emergence uniformity, and plant growth and development rates are key determinants of yield efficiency [17]. Alfalfa is a heliophyte, therefore light has a particularly strong effect on the intensity of its photosynthesis and its chlorophyll content [18][19].…”

Section: Introductionmentioning

confidence: 99%

Effect of Stress Caused by Electromagnetic Stimulation on the Fluorescence Lifetime of Chlorophylls in Alfalfa Leaves

Dziwulska‐Hunek

Ćwintal

Niemczynowicz

et al. 2019

Pol. J. Environ. Stud.

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The experimental material consisted of leaves obtained from 6-and 2-year-old alfalfa plants. Samples were obtained from a field experiment. One day prior to sowing, seeds were stimulated using He-Ne laser light with a surface power density of 6 mW•cm-2-free-fall exposure (L) repeated three times; alternating magnetic field with 30 mT induction and 30 s (P) exposure time; and a combination of laser light and magnetic field (L+P). The results of the stimulation treatments were referenced to non-stimulated samples (control-K). The obtained values of fluorescence lifetime varied from 8.98 to 12.90 ns (t1) and from 3.84 to 5.14 ns (t2). The physical factors applied caused an extension of the lifetimes (t1 and t2), as well as an increase in the chlorophyll a and carotenoid content in 6-year-old cv. Radius leaves, as compared to the control. Contrary observations (i.e., a decrease in the aforementioned indicators) were made for cv. Ulstar (old). In the case of magnetic field stimulation, the longest fluorescence lifetimes, the highest concentrations of chlorophyll a and carotenoids were noted for cv. Radius (old). The content of chlorophyll a was significantly higher in young Lucerne than in older plants.

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“…Further, roots are sensitive as remained in direct contact with all these pollutants. Moreover, excessive amount of sulphide greatly restricts the uptake of cationic micronutrients such as Cu, Fe, Mn and Zn, thus affecting root development (Dotaniya et al 2014;Rekik et al 2017). Another reason in decline of root length in P. pinnata can be due to more metabolic activities of antioxidants (peroxidases) which deposit more lignin in the cell walls that diminish plasticity of cell wall, and subsequently inhibition in its elongation as reported in some Vigna species under heavy metal stress .…”

Section: Impact Of Effluent On Morphological Parametersmentioning

confidence: 99%

“…Morphological predictors provide some indicators of successful survival of plants under abiotic stress, but the underlying genetic variability to cope with stress is mostly understood through protein expressions. Thus, effective means of stress mitigation are provided by such successful strategies that ultimately result in sustainable growth of plants (Rekik et al 2017).…”

Section: Impact Of Effluent On Morphological Parametersmentioning

confidence: 99%

Tannery Effluent Induced Morpho-Biochemical Expressions and Chromium Accumulation in Jatropha curcas L. and Pongamia pinnata L.

Abid¹,

Mahmood²,

Ghaffar³

et al. 2019

JSM

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The use of effluent from various industries by agriculture sector in developing countries may help to mitigate water scarcity and cost of fertilizers but pose considerable threats to entire ecosystem when heavy metals enter the food chain. The aim of the present study was to compare the growth and development of two biofuel tree species Jatropha curcas L. and Pongamia pinnata L. when exposed to 20 and 40 mL L −1 of effluent discharged from a local tannery along with tap water as a control. The physico-chemical attributes assessed for quality of effluent showed higher values and significantly higher chromium (Cr) concentration than other metals. Application of effluent induced profound formation of malondialdehyde (MDA) in P. pinnata. With regard to growth and pigments of plant species, a significant reduction (p≤0.05) in root length, dry shoot biomass, leaf area, chlorophylls and carotenoids occurred in P. pinnata but shoot length, collar diameter and root dry biomass remained unaffected. Similarly, J. curcas sustained root and shoot growth, dry biomass production, collar diameter and leaf area. Increased pigment contents were found at both effluent levels. The roots of P. pinnata accumulated 6 and 11 times more Cr at 20 and 40 mL L −1 , respectively, than control. While in J. curcas Cr accumulation was up to 9 folds in shoots at 40 mL L −1. Thus, the two species exhibited differential potential for Cr accumulation in their above and below ground tissues. The study signified the use of contaminated water for irrigation and potential of the species to act as phytoremediator to alleviate both water scarcity and metal contamination.

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Effects of untreated and treated wastewater at the morphological, physiological and biochemical levels on seed germination and development of sorghum (Sorghum bicolor (L.) Moench), alfalfa (Medicago sativa L.) and fescue (Festuca arundinacea Schreb.)

Cited by 47 publications

References 33 publications

Comparative Genomics of Bacillus amyloliquefaciens Strains Reveals a Core Genome with Traits for Habitat Adaptation and a Secondary Metabolites Rich Accessory Genome

Comparative Genomics of Bacillus amyloliquefaciens Strains Reveals a Core Genome with Traits for Habitat Adaptation and a Secondary Metabolites Rich Accessory Genome

Effect of Stress Caused by Electromagnetic Stimulation on the Fluorescence Lifetime of Chlorophylls in Alfalfa Leaves

Tannery Effluent Induced Morpho-Biochemical Expressions and Chromium Accumulation in Jatropha curcas L. and Pongamia pinnata L.

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