Distribution and forms of cadmium on the rhizosphere of<i>Brassica juncea</i>in Cd-contaminated soils and implications for phytoremediation

Yanai, Junta; Mabuchi, Nozomi; Moritsuka, Naoki; Kosaki, Takashi

doi:10.1080/00380768.2004.10408496

Cited by 13 publications

(11 citation statements)

References 22 publications

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“…1995), although there is a possibility that the high amounts of available Cd and Zn restricted the nitrification process. In addition, as reported by Yanai et al . (2004), the pH decrease could be ascribed to N uptake by plants in the form of .…”

Section: Discussionsupporting

confidence: 75%

“…In contrast, Goto et al . (2003) and Yanai et al . (2004) observed significant pH decreases in the rhizospheres of Brassica juncea plants grown in Cd‐contaminated rhizobox soils.…”

Section: Discussionmentioning

confidence: 97%

“…Significant decreases in Cd concentrations in the organically bound fractions of rhizosphere soils have been reported for Brassica juncea grown in Fluvisoil and Andosol soils that were artificially contaminated with Cd (Yanai et al . 2004).…”

Section: Discussionmentioning

confidence: 98%

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Zinc and cadmium uptake from a metalliferous soil by a mixed culture ofAthyrium yokoscenseandArabis flagellosa

Chen

Setagawa

Kang

et al. 2009

Soil Science and Plant Nutrition

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Populations of Athyrium yokoscense, a fern that hyperaccumulates Zn and Cd, have often been found at abandoned mining sites in Japan, and are often accompanied by another Zn and Cd hyperaccumulating plant, Arabis flagellosa. We compared the Zn and Cd uptake characteristics of At. yokoscense and Ar. flagellosa and examined the influences of community development on Zn and Cd uptake by each plant. A soil culture experiment was conducted using a rhizobox system with seven compartments, each filled with a metalliferous soil taken from Ikuno‐cho, Hyogo Prefecture, Japan. The treatments consisted of the following three planting schemes: two plants of At. yokoscense (AY), two plants of Ar. flagellosa (AF) and a mixed planting of two plants of each species (AY+AF). After 3 months of cultivation, the Zn and Cd concentrations in the shoots were approximately 4.0 and 0.9 g kg−1 for At. yokoscense in the AY treatment and 24 and 0.3 g kg−1 for Ar. flagellosa in the AF treatment, respectively. These results indicated that Ar. flagellosa was more efficient at accumulating Zn in the shoots than At. yokoscense. In the AY+AF treatment, the amounts of water‐soluble Zn and Cd in the soil of the central compartments were significantly higher than those in the AY and AF treatments. Despite this, the Zn and Cd concentrations in the shoots of Ar. flagellosa in the AY+AF treatment were not significantly different from those in the AF treatment. The Cd content in the shoots of At. yokoscense was higher in the AY+AF treatment than in the AY treatment, owing to a growth enhancement in the AY+AF treatment. Consistent with the results for the AY and AF treatments, Ar. flagellosa accumulated higher shoot concentrations of Zn than At. yokoscense and At. yokoscense accumulated higher concentrations of Cd than Ar. flagellosa in the AY+AF treatment. These results suggested that the levels of Zn and Cd accumulated by these two plants were not largely affected by their community development, and implied that communities of these plants do not develop as a result of mutual effects on metal uptake.

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Section: Discussionsupporting

confidence: 75%

“…In contrast, Goto et al . (2003) and Yanai et al . (2004) observed significant pH decreases in the rhizospheres of Brassica juncea plants grown in Cd‐contaminated rhizobox soils.…”

Section: Discussionmentioning

confidence: 97%

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Zinc and cadmium uptake from a metalliferous soil by a mixed culture ofAthyrium yokoscenseandArabis flagellosa

Chen

Setagawa

Kang

et al. 2009

Soil Science and Plant Nutrition

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“…The soils used for the pot experiment were a Fluvisol and an Andosol (FA0 2001) or Fluvaquent and Melanudand (Soil Survey Staff 1998), both of which are among the representative soil types in Japan. The Fluvisol was collected from the Ap horizon in the experimental farm of Kyoto University and the Andosol was collected from the A horizon of the experimental forest of Tottori University (Yanai et al 2004). Selected general properties of the soils are listed in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Potential ofThlaspi caerulescensfor Cadmium Phytoremediation: Comparison of Two Representative Soil Types in Japan under Different Planting Frequencies

Nishiyama¹,

Yanai²,

Kosaki³

2005

Soil Science and Plant Nutrition

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To assess the potential of the Cd hyperaccumulator Thlaspi caerulescens (Ganges ecotype) for Cd phytoremediation in Japan, we compared the changes in the soil Cd concentration between a Fluvisol and an Andosol and the efficiency of Cd removal under different planting frequencies in a pot experiment. The soils were artificially contaminated with Cd(NO3)2 to the level of about 5 mg Cd kg−1. The cultivation system of Thlaspi caerulescens applied to both soil types continued for 4 months (4 × 1 treatment) and the other system only applied to the Fluvisol consisted of two plantings, at the beginning and after 2 months (2 × 2 treatment). Control without plants was also prepared. The cumulative amount of Cd absorbed by shoots for 4 months was 385 μg pot−1 for the 4 × 1 treatment of the Fluvisol, 582 μg pot−1 for the 2 × 2 treatment of the Fluvisol, and 112 μg pot−1 for the Andosol. In the Fluvisol, Thlaspi caerulescens plants in the 2 × 2 treatment could remove 1.5 times more Cd than in the 4 × 1 treatment. A much higher Cd concentration in the shoots of the second cropping in the 2 × 2 treatment mainly led to this difference in efficiency. The total Cd concentration of the unplanted Fluvisol and Andosol was 5.0 and 6.1 mg kg−1, and after 4 months, that of the Fluvisol in the 4 × 1 and 2 × 2 treatments and the Andosol reached 4.0, 2.9 and 5.1 mg kg−1, respectively. The difference between the rhizosphere and the non‐rhizosphere soils was not evident in the Fluvisol, while the concentration in the rhizosphere was lower than that in the non‐rhizosphere soil in the Andosol. In the Fluvisol, the amount of available (1 M NH4NO3‐extractable) Cd decreased only in the rhizosphere, while in the Andosol, it was halved in both rhizosphere and non‐rhizosphere soils. Furthermore, the ratio of the amount of available Cd to total Cd did not decrease in the Fluvisol, whereas it decreased in the Andosol, which indicated the presence of a smaller pool of potentially available Cd in the Andosol. Based on the shoot biomass and bioaccumulation factor obtained in the 4 × 1 treatment, it was estimated that only about 2 crops for the Fluvisol and 6 crops for the Andosol could decrease the Cd concentration to 50%. In conclusion, 1) short‐rotation is recommended because of the high Cd concentration in the shoots of the second cropping and the increase in the volume of the rhizosphere soil, 2) the amount of available Cd in soil should be monitored in addition to the concentration of total Cd to evaluate the effectiveness of phytoremediation, and 3) the potential of Thlaspi caerulescens was clearly demonstrated and the use of this hyperaccumulator could become a promising alternative for the remediation of Cd‐contaminated soils in Japan.

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“…Sorghum spp can be used in remediation process, because their fibrous root show the efficiency in accumulation of heavy metals (Jadia and Fulekar 2008). Further, the use of phytoextraction are simple, more economically viable and environment friendly (Garbisu and Alkorta 2001 (Yanai et al 2004, Ishikawa et al 2006, Murakami et al 2007). Information about heavy metal accumulation among vegetables is important to understand the best accumulator.…”

Section: Introductionmentioning

confidence: 99%

Screening of Vegetables for Phytoextraction of Heavy Metals

Kafle

2014

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Distribution and forms of cadmium on the rhizosphere ofBrassica junceain Cd-contaminated soils and implications for phytoremediation

Cited by 13 publications

References 22 publications

Zinc and cadmium uptake from a metalliferous soil by a mixed culture ofAthyrium yokoscenseandArabis flagellosa

Zinc and cadmium uptake from a metalliferous soil by a mixed culture ofAthyrium yokoscenseandArabis flagellosa

Potential ofThlaspi caerulescensfor Cadmium Phytoremediation: Comparison of Two Representative Soil Types in Japan under Different Planting Frequencies

Screening of Vegetables for Phytoextraction of Heavy Metals

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