Effects of phosphorous application on arsenic toxicity to and uptake by rice seedlings in As-contaminated paddy soils

Lee, Chia-Hsing; Wu, Chia-Chien; Syu, Chien-Hui; Jiang, Pei-Yu; Huang, Chien-Hua; Lee, Dar‐Yuan

doi:10.1016/j.geoderma.2016.01.003

Cited by 68 publications

(22 citation statements)

References 47 publications

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“…Lee et al [146] suggested three important factors controlling the effect of P on arsenic mobility in soil and its uptake in rice: (1) the competition between arsenic and P for adsorption sites on soil particles, (2) the antagonistic effect between inorganic phosphate (Pi) and arsenic during uptake in rice roots, and (3) the role of Pi in translocation of arsenic from root to shoot. Arsenic toxicity in plants depends on the As/P ratio in the soil rather than the absolute arsenic concentration.…”

Section: Role Of Phosphorusmentioning

confidence: 99%

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

Mitra¹,

et al. 2017

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According to recent reports, millions of people across the globe are suffering from arsenic (As) toxicity. Arsenic is present in different oxidative states in the environment and enters in the food chain through soil and water. In the agricultural field, irrigation with arsenic contaminated water, that is, having a higher level of arsenic contamination on the top soil, which may affects the quality of crop production. The major crop like rice (Oryza sativa L.) requires a considerable amount of water to complete its lifecycle. Rice plants potentially accumulate arsenic, particularly inorganic arsenic (iAs) from the field, in different body parts including grains. Different transporters have been reported in assisting the accumulation of arsenic in plant cells; for example, arsenate (As V ) is absorbed with the help of phosphate transporters, and arsenite (As III ) through nodulin 26-like intrinsic protein (NIP) by the silicon transport pathway and plasma membrane intrinsic protein aquaporins. Researchers and practitioners are trying their level best to mitigate the problem of As contamination in rice. However, the solution strategies vary considerably with various factors, such as cultural practices, soil, water, and environmental/economic conditions, etc. The contemporary work on rice to explain arsenic uptake, transport, and metabolism processes at rhizosphere, may help to formulate better plans. Common agronomical practices like rain water harvesting for crop irrigation, use of natural components that help in arsenic methylation, and biotechnological approaches may explore how to reduce arsenic uptake by food crops. This review will encompass the research advances and practical agronomic strategies on arsenic contamination in rice crop.

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Section: Role Of Phosphorusmentioning

confidence: 99%

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

Mitra¹,

et al. 2017

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“…Studies have ended with opposing views as to the effects of P treatments. In an experiment conducted by Lee, et al (2015) concerning the effects of P application on As toxicity in rice, concluded that there was the possibility that the addition of phosphate increased the concentration of As in the soil water, but this depended greatly on soil properties. Lee, et al (2015) also concluded that competitive uptake of As and P by rice seedlings did not occur even at high P concentrations, nor did it decrease the bioavailability of As to the rice.…”

Section: Methodsmentioning

confidence: 99%

“…In an experiment conducted by Lee, et al (2015) concerning the effects of P application on As toxicity in rice, concluded that there was the possibility that the addition of phosphate increased the concentration of As in the soil water, but this depended greatly on soil properties. Lee, et al (2015) also concluded that competitive uptake of As and P by rice seedlings did not occur even at high P concentrations, nor did it decrease the bioavailability of As to the rice. Despite the conclusion of the experiment Lee, et al (2015) also stated that the assumption that P application reduces As uptake has been supported by several studies.…”

Section: Methodsmentioning

confidence: 99%

“…Rice (Oryza sativa L.) is a staple food source in many countries (Lee, et al, 2015) providing 35-60% of total calorie intake in Asian countries (Liang, et al, 2016) where 90% of rice is produced (FAOSTAT, 2017). Rice requires a large water input with its average water productivity being half that of wheat, at 0.4kg grain m -3 in Asia (Bouman, et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The World Health Organisation (2016) state that arsenic is one of their 10 chemicals of major public health concern, and have a recommended limit of 10µg/L in drinking water. Arsenic contaminated ground water affects many areas in which rice is grown (Dixit, 2016;Srivastava, et al, 2015) and is believed to be one of the major sources of entry into the human body (Lee, et al, 2015). In these areas arsenic contamination can exceed 1000µg/L (Srivastava, et al, 2015), with Dixit, et al (2016) stating that in some areas in south east Asia As levels in drinking water are as high as 3200µg/L.…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Phosphorous and Selenium Treatments on Arsenic Uptake and Plant Growth in Rice (Oryza sativa L.)

Barton

Collins

Westland

et al. 2018

“Agriculture for Life, Life for Agriculture” Conference Proceedings

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Phosphorus (P) and Selenium (Se) supplementation to rice plants grown in Arsenic (As) contaminated conditions as be found by many studies to reduce As uptake and benefit growth in such conditions, however there are some inconsistencies as to how effective these treatments are. This study investigates the effect of 0, 0.5, 1, 1.5 and double the recommended concentration of P and Se on the growth of rice seedlings both with and without the presence of As over a maximum 20 day period. Analysis of the growth data collected indicated that there is no significant difference in the leaf, maximum and minimum root lengths, leaf and root numbers or the As content of the plant material. This study finds that different concentrations of P and Se do not affect growth at early stages and do not affect As uptake.

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