Pectinous cell wall thickenings formation – A common defense strategy of plants to cope with Pb

Krzesłowska, Magdalena; Rabęda, Irena; Basińska, Anna; Lewandowski, Michał; Mellerowicz, Ewa J.; Napieralska, Anna; Samardakiewicz, Sławomir; Woźny, Adam

doi:10.1016/j.envpol.2016.04.019

Cited by 101 publications

(34 citation statements)

References 57 publications

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“…In addition, in Ni + BL, the formation of cell wall channels with granular deposits and secretion of lipids and pectins occurred. Accumulation of waxes and a pectin layer can be considered a defence reaction aimed at restricting the transport of heavy metals, such as Pb or Ni, into the protoplast (Krzesłowska et al 2009, 2016; Meychik et al 2014). Therefore, D. jasminea can be classified as Ni-sensitive species, counteracting Ni toxicity by cell wall reorganization.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the protective role of exogenous growth regulators against Ni toxicity in woody shrub Daphne jasminea

Wiszniewska

Muszyńska

Hanus-Fajerska

et al. 2018

Planta

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Main conclusion The results provide a significant verification of the activity of exogenously applied phytohormones: gibberellic acid, jasmonic acid, and brassinolide in the modulation of the plant’s response to nickel treatment. AbstractThe study investigated nickel accumulation and its toxicity to Daphne jasminea shoots cultured in vitro with or without exogenous supplementation with phytohormones: gibberellic acid (GA3), jasmonic acid (JA), and brassinolide (BL). The aim was to verify the modulatory effect of exogenous plant growth regulators (PGRs) on plant reaction to Ni excess. The combined action of Ni and PGRs was evaluated at the anatomical, ultrastructural, and biochemical levels. Nickel toxicity was manifested in decreased biomass accretion and growth tolerance index (83–53.6%), attributed to enhanced synthesis of growth inhibitors, mainly abscisic acid. As a defence reaction, endogenous gibberellins accumulated. Exogenous GA3 ameliorated the plant reaction to Ni stress, inducing proliferation and growth rate. Ni tolerance in the presence of GA3 was attributed to peroxisomal reactions that stimulated the synthesis of endogenous JA. In contrast, the application of BL caused enhanced Ni accumulation. Plants suffered from pronounced stress due to massive oxidation. The defence strategy of plants subjected to Ni and BL involved cell wall rearrangements. Exogenous JA stimulated the synthesis of active auxins and salicylic acid, contributing to enhanced mitotic activity within explants. However, JA disturbed the integrity of chloroplasts and lamellar compartments. Our study revealed that an action of exogenous PGRs may either enhance tolerance to Ni or increase metal toxicity in D. jasminea. Particularly in in vitro culture, where explants are subjected to external phytohormonal stimuli, the combined effects of supplemental PGRs may enhance stress and substantially affect plant development. Our results provide a significant verification of exogenous PGRs activity in the modulation of plant response to nickel.Electronic supplementary materialThe online version of this article (10.1007/s00425-018-2979-6) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Evaluation of the protective role of exogenous growth regulators against Ni toxicity in woody shrub Daphne jasminea

Wiszniewska

Muszyńska

Hanus-Fajerska

et al. 2018

Planta

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“…Małecka et al [ 101 ]. Krzesłowska et al [ 102 ] reported that plant cell wall (CW) remodeling, in particular formation of CW thickenings (CWTs) abundant in low-methylesterified pectins (pectin epitope JIM5 - JIM5-P) able to bind metal ions, including Pb, certainly increases the CW capacity for toxic metal ion binding and compartmentalisation. Rabęda et al [ 103 ] reported that binding trace metals by JIM5-P may lead to a reduction of cell elongation and plant growth inhibition.…”

Section: Discussionmentioning

confidence: 99%

The Influence of Lead on Generation of Signalling Molecules and Accumulation of Flavonoids in Pea Seedlings in Response to Pea Aphid Infestation

et al. 2017

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The aim of this study was to investigate the effect of an abiotic factor, i.e., lead at various concentrations (low causing a hormesis effect and causing high toxicity effects), on the generation of signalling molecules in pea (Pisum sativum L. cv. Cysterski) seedlings and then during infestation by the pea aphid (Acyrthosiphon pisum Harris). The second objective was to verify whether the presence of lead in pea seedling organs and induction of signalling pathways dependent on the concentration of this metal trigger defense responses to A. pisum. Therefore, the profile of flavonoids and expression levels of genes encoding enzymes of the flavonoid biosynthesis pathway (phenylalanine ammonialyase and chalcone synthase) were determined. A significant accumulation of total salicylic acid (TSA) and abscisic acid (ABA) was recorded in the roots and leaves of pea seedlings growing on lead-supplemented medium and next during infestation by aphids. Increased generation of these phytohormones strongly enhanced the biosynthesis of flavonoids, including a phytoalexin, pisatin. This research provides insights into the cross-talk between the abiotic (lead) and biotic factor (aphid infestation) on the level of the generation of signalling molecules and their role in the induction of flavonoid biosynthesis.

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“…Trichome birefringence (TBR) contributes to the synthesis and deposition of secondary wall cellulose, and helps to maintain the esterification of pectin [63,64]. It has been demonstrated that increasing cell wall capacity for the compartmentalization of Pb is a major approach for plant cell to protect protoplasts from Pb toxicity [9,[65][66][67]. In this study, BnaC03g02690D, a homology of TBR (AT5G06700) gene, was also identified in QTL Pb-A03-1 ( Table 2).…”

Section: Tbr Protein Was Associated With Pb Tolerance By Regulating Cmentioning

confidence: 77%

Genome-wide association study (GWAS) reveals genetic loci of lead (Pb) tolerance during seedling establishment in rapeseed (Brassica napus L.)

Zhang

Xiao

et al. 2020

BMC Genomics

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Background: Lead (Pb) pollution in soil has become one of the major environmental threats to plant growth and human health. Safe utilization of Pb contaminated soil by phytoremediation require Pb-tolerant rapeseed (Brassica napus L.) accessions. However, breeding of new B. napus cultivars tolerance to Pb stress has been restricted by limited knowledge on molecular mechanisms involved in Pb tolerance. This work was carried out to identify genetic loci related to Pb tolerance during seedling establishment in rapeseed. Results: Pb tolerance, which was assessed by quantifying radicle length (RL) under 0 or 100 mg/L Pb stress condition, shown an extensive variation in 472 worldwide-collected rapeseed accessions. Based on the criterion of relative RL > 80%, six Pb-tolerant genotypes were selected. Four quantitative trait loci (QTLs) associated with Pb tolerance were identified by Genome-wide association study. The expression level of nine promising candidate genes, including GSTUs, BCATs, UBP13, TBR and HIPP01, located in these four QTL regions, were significantly higher or induced by Pb in Pb-tolerant accessions in comparison to Pb-sensitive accessions.Conclusion: To our knowledge, this is the first study on Pb-tolerant germplasms and genomic loci in B. napus. The findings can provide valuable genetic resources for the breeding of Pb-tolerant B. napus cultivars and understanding of Pb tolerance mechanism in Brassica species.

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Pectinous cell wall thickenings formation – A common defense strategy of plants to cope with Pb

Cited by 101 publications

References 57 publications

Evaluation of the protective role of exogenous growth regulators against Ni toxicity in woody shrub Daphne jasminea

Evaluation of the protective role of exogenous growth regulators against Ni toxicity in woody shrub Daphne jasminea

The Influence of Lead on Generation of Signalling Molecules and Accumulation of Flavonoids in Pea Seedlings in Response to Pea Aphid Infestation

Genome-wide association study (GWAS) reveals genetic loci of lead (Pb) tolerance during seedling establishment in rapeseed (Brassica napus L.)

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