Effects of root anatomy and Fe plaque on arsenic uptake by rice seedlings grown in solution culture

Deng, Dan; Wu, Sheng; Wu, Feiyue; Deng, Hong; Wong, Ming Hung

doi:10.1016/j.envpol.2010.05.015

Cited by 96 publications

(46 citation statements)

References 50 publications

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“…The extension of root damage due to As toxicity differs among species and could be an indicator to differentiate resistant from vulnerable species (Silva, 2008;Deng et al, 2010;Pereira et al, 2011;Schneider et al, 2012). Pereira et al (2011), for instance, observed no root damage in Eichhornia crassipes, considered a tolerant species, grown in nutrient solution with 2.0 mg L -1 As.…”

Section: Resultsmentioning

confidence: 99%

Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. seedlings

Cipriani

Dias²,

Costa³

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYAcacia mangium and Mimosa caesalpiniaefolia are fast-growing woody fabaceous species that might be suitable for phytoremediation of arsenic (As)-contaminated sites. To date, few studies on their tolerance to As toxicity have been published. Therefore, this study assessed As toxicity symptoms in A. mangium and M. caesalpiniaefolia seedlings under As stress in a greenhouse. Seedlings of Acacia mangium and M. caesalpiniaefolia were grown for 120 d in an Oxisol-sand mixture with 0, 50, 100, 200, and 400 mg kg -1 As, in four replications in four randomized blocks. The plants were assessed for visible toxicity symptoms, dry matter production, shoot/root ratio, root anatomy and As uptake. Analyses of variance and regression showed that the growth of A. mangium and M. caesalpiniaefolia was severely hindered by As, with a reduction in dry matter production of more than 80 % at the highest As rate. The root/shoot ratio increased with increasing As rates. At a rate of 400 mg kg -1 As, whitish chlorosis appeared on Mimosa caesalpiniaefolia seedlings. The root anatomy of both species was altered, resulting in cell collapse, death of root buds and accumulation of phenolic compounds. Arsenic concentration was several times greater in roots than in shoots, with more than 150 and 350 mg kg -1 in M. caesalpiniaefolia and A. mangium roots, respectively. These species could be suitable for phytostabilization of As-contaminated sites, but growth-stimulating measures should be used.Index terms: arsenate, heavy metals, phytoremediation, root anatomy, soil contamination.(

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Section: Resultsmentioning

confidence: 99%

Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. seedlings

Cipriani

Dias²,

Costa³

et al. 2013

Rev. Bras. Ciênc. Solo

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show abstract

“…The Fe coating can sequester metals in wetland plant roots and modify As translocation from the roots to the shoots (Rahman et al, 2014c). Rhizosphere interactions therefore play a key role in controlling As bioavailability in rice cultivation (Deng et al, 2010).…”

Section: Arsenic Translocation In Ricementioning

confidence: 99%

“…Other studies show that radial oxygen loss (ROL) rates were negatively correlated with As concentrations in rice roots among different genotypes. Rice genotypes with higher porosity can sequester less As of the Fe coating in the root, reduce its translocation to the plant, and finally to the grain (Deng et al, 2010).…”

Section: Factors Influencing Arsenic Absorption In the Rice Plantmentioning

confidence: 99%

Arsenic translocation in rice cultivation and its implication for human health

Bastías-Montes¹,

Beldarraín²

2016

Chilean J. Agric. Res.

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“…ROL are essential for the detoxification of phytotoxins, including Fe 2+ , Mn 2+ , and H 2 S, S 2À , HS À , and organic acids (McDonald et al, 2001;Armstrong and Armstrong, 2005). It is reported that ROL of roots was relevant to As tolerance and accumulation in rice (Mei et al, 2009;Deng et al, 2010;Wu et al, 2011). Our previous study showed that rice genotypes with higher rates of ROL inclined to accumulate less As concentrations in rice grains .…”

Section: Introductionmentioning

confidence: 96%

Effects of silicon (Si) on arsenic (As) accumulation and speciation in rice (Oryza sativa L.) genotypes with different radial oxygen loss (ROL)

Xue

et al. 2015

Chemosphere

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Effects of root anatomy and Fe plaque on arsenic uptake by rice seedlings grown in solution culture

Cited by 96 publications

References 50 publications

Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. seedlings

Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. seedlings

Arsenic translocation in rice cultivation and its implication for human health

Effects of silicon (Si) on arsenic (As) accumulation and speciation in rice (Oryza sativa L.) genotypes with different radial oxygen loss (ROL)

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