Soil antimony pollution and plant growth stage affect the biodiversity of auxin-producing bacteria isolated from the rhizosphere of Achillea ageratum L

Picard, Christine; Bosco, Marcella

doi:10.1016/s0168-6496(03)00206-x

Cited by 30 publications

(21 citation statements)

References 44 publications

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“…Level of root colonization exhibits dramatic variation related to plant age (Picard et al 2000(Picard et al , 2004Roesh et al 2006), thus genotype rank can vary significantly depending upon plant age at the time of analysis. For example, the frequency of beneficial root-colonizing microorganisms was found to be very low in the initial stage of plant growth, greatly increased at the flowering stage, and then decreased with physiological maturation, at least for maize (Picard et al 2000, Roesh et al 2006 and for Achillea ageratum L plants (Picard and Bosco 2003). Interestingly, it is also at the flowering stage that greater differences in root colonization are observed between maize cultivars Bosco 2005, 2006;Picard et al 2004.…”

Section: Useful Traits For Better Nutrition Via Beneficial Plant-micrmentioning

confidence: 97%

Novel approaches in plant breeding for rhizosphere-related traits

2008

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Selection of modern varieties has typically been performed in standardized, high fertility systems with a primary focus on yield. This could have contributed to the loss of plant genes associated with efficient nutrient acquisition strategies and adaptation to soil-related biotic and abiotic stresses if such adaptive strategies incurred a cost to the plant that compromised yield. Furthermore, beneficial interactions between plants and associated soil organisms may have been made obsolete by the provision of nutrients in high quantity and in readily plant available forms. A review of evidence from studies comparing older traditional varieties to modern high yielding varieties indeed showed that this has been the case. Given the necessity to use scarce and increasingly costly fertilizer inputs more efficiently while also raising productivity on poorer soils, it will be crucial to reintroduce desirable rhizosphere-related traits into elite cultivars. Traits that offer possibilities for improving nutrient acquisition capacity, plantmicrobe interactions and tolerance to abiotic and biotic soil stresses in modern varieties were reviewed. Despite the considerable effort devoted to the identification of suitable donors and of genetic factors associated with these beneficial traits, progress in developing improved varieties has been slow and has so far largely been confined to modifications of traditional breeding procedures. Modern molecular tools have only very recently started to play a rather small role. The few successful cases reviewed in this paper have shown that novel breeding approaches using molecular tools do work in principle. When successful, they involved close collaboration between breeders and scientists conducting basic research, and confirmation of phenotypes in field tests as a 'reality check'. We concluded that for novel molecular approaches to make a significant contribution to breeding for rhizosphere related traits it will be essential to narrow the gap between basic sciences and applied breeding through more interdisciplinary research that addresses rather than avoids the complexity of plant-soil interactions.

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Section: Useful Traits For Better Nutrition Via Beneficial Plant-micrmentioning

confidence: 97%

Novel approaches in plant breeding for rhizosphere-related traits

2008

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“…Efforts have been directed towards methodology for its determination (Ji et al 2003) and assessing its occurrence and geochemistry (Belzile et al 2001;Filella et al 2002aFilella et al , b, 2003aShotyk et al 2005a, b;Wagner et al 2003).The identification of Sb speciation in fresh plant extracts (Dodd et al 1996), the mobility (Ashley et al 2003;Hammel et al 2000) and speciation of Sb in soil and its availability to plants (Flynn et al 2003;He and Wan 2004;Koch et al 2000;Lintschinger et al 1998;Picard and Bosco 2003), Sb(III) binding to humic substances (Buschmann and Sigg 2004) and the biomethylation of inorganic Sb compounds by an aerobic fungus (Jenkins et al 1998) have been investigated. In May of 2005, the First International Workshop on Sb in the Environment was held in Germany (Shotyk et al 2005a).…”

Section: Introductionmentioning

confidence: 99%

Distribution and phytoavailability of antimony at an antimony mining and smelting area, Hunan, China

2007

Environ Geochem Health

260

107

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An investigation of the distribution, fractionation and phytoavailability of antimony (Sb) and other heavy metals in soil sampled at various locations in the vicinity of a Sb mine revealed elevated levels of Sb, most certainly due to the mining activities. The concentration of Sb in the soil samples was 100.6-5045 mg kg(-1); in comparison, the maximum permissible concentration for Sb in soil in The Netherlands is 3.5 mg kg(-1), and the maximum permissible concentration of pollutant Sb in receiving soils recommended by the World Health Organization is 36 mg kg(-1). The soil sampled near the Sb mine areas had also contained high concentrations of As and Hg. Root and leaf samples from plants growing in the Sb mine area contained high concentrations of Sb, with the concentration of Sb in the leaves of radish positively correlating with Sb concentrations in soil. The distribution of Sb in the soil showed the following order: strongly bound to the crystalline matrix > adsorbed on Fe/Mn hydrous oxides, complexed to organic/sulfides, bound to carbonates > weakly bound and soluble. Solvents showed varying levels of effectiveness in extracting Sb (based on concentration) from the soil, with SbNH4NO3 > SbEDTA > SbHAc, SbH2O > SbNH4OAc, in decreasing order. The concentration of easily phytoavailable Sb was high and varied from 2.5 to 13.2 mg kg(-1), the percentage of moderately phytoavailable Sb ranged from 1.62 to 8.26%, and the not phytoavailable fraction represented 88.2-97.9% of total Sb in soils.

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“…Sb contamination of soil has been reported in some countries, [2][3][4][5][6][7][8][9][10][11] and research has examined the mobility of Sb in the soil and the transfer of Sb to plants. 7,9,11 The toxicity or solubility of Sb depends on its chemical state. Sb(III) is about ten times more toxic than Sb(V), 12 because Sb(V) is easier to excrete than Sb(III).…”

Section: Introductionmentioning

confidence: 99%

Determination of Chemical Form of Antimony in Contaminated Soil around a Smelter Using X-ray Absorption Fine Structure

et al. 2005

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Only limited information is available about the behavior of antimony (Sb) in contaminated soils. However, understanding the behavior of Sb in contaminated soils is important, because the toxicity or solubility of this element depends on its chemical state. In this study, we investigated the levels of Sb and the chemical forms of Sb in the soil around a smelter using X-ray absorption fine structure (XAFS) spectra. The highest Sb concentration in the contaminated soil was 2900 mg/kg dry soil. According to Sb-K edge X-ray absorption near edge (XANE) spectra, the Sb in the soil was in the form of Sb(V) compounds. The similarity of extended XAFS (EXAFS) spectra suggests that Sb speciation was independent of the sampling site, which indicates that Sb or Sb2O3 emitted from the smelter was converted into Sb(V) compounds in the soil.

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Soil antimony pollution and plant growth stage affect the biodiversity of auxin-producing bacteria isolated from the rhizosphere of Achillea ageratum L

Cited by 30 publications

References 44 publications

Novel approaches in plant breeding for rhizosphere-related traits

Novel approaches in plant breeding for rhizosphere-related traits

Distribution and phytoavailability of antimony at an antimony mining and smelting area, Hunan, China

Determination of Chemical Form of Antimony in Contaminated Soil around a Smelter Using X-ray Absorption Fine Structure

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