Differences in Cadmium Accumulation and Root Morphology in Seedlings of Japanese Wheat Varieties with Distinctive Grain Cadmium Concentration

Kubo, Katashi; Watanabe, Yoshiaki; Matsunaka, Hitoshi; Seki, Masayuki; Fujita, Masaya; Kawada, Naoyuki; Hatta, Koichi; Nakajima, Takashi

doi:10.1626/pps.14.148

Cited by 56 publications

(20 citation statements)

References 18 publications

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“…Our measure is found to be sensitive enough compared to other study which used 50 mM of Cd for 15 days exposure (Rodríguez-Serrano et al 2006). Kubo et al (2011) also reported similar results that root branching slowly or limited development was related by lower Cd uptake at seedling stage of Japanese wheat. Lux et al (2010) researched the root structure of plant Merwilla plumbea under Cd stress and described the response of this plant under Cd stress through Cd uptake in different organs and growth parameters.…”

Section: Discussionsupporting

confidence: 76%

Fractal based complexity analysis of wheat root system under different heavy metals

Rajagoplan

Kadono

2019

Plant Biotechnology

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In this study, fractal geometry was applied to characterize the complexity of the root system morphology of wheat plants under the exposure of heavy metals, namely cadmium (Cd), copper (Cu) and zinc (Zn). We proposed a measure called, relative complexity index (RCI), a ratio based on fractal dimension (FD) before and after exposure to heavy metals. FDs were calculated by box-counting method with digitized and skeletonized images of roots of wheat plants cultivated in hydroculture system. RCI, and relative weight were mesuared under different concentrations of Cd (0.001, 0.01 and 0.05 mM), Cu (0.016, 0.4 and 1.2 mM) and Zn (0.3 and 0.75 mM). Results showed significant reduction of RCI for Cd stress with 0.01 and 0.05, all Cu concentrations and promotion at all zinc concentrations. In comparison, no statistically significant changes were found in conventional relative weight measurement at low concentrations of Cu, Cd and Zn. RCI were more sensitive and were reliable in reflecting the influence of heavy metals than the conventional measure. These results imply that RCI can be an effective measure of the negative and positive effects of heavy metals on the development of complexity of root system under heavy metal exposures.

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Section: Discussionsupporting

confidence: 76%

Fractal based complexity analysis of wheat root system under different heavy metals

Rajagoplan

Kadono

2019

Plant Biotechnology

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“…Long-term monitoring of crops and soils in fields with high buckwheat radioactive Cs concentrations despite sufficient soil exchangeable K is of particular importance. In addition, analyses of genetic variation in Cs accumulation within the species, Cs translocation among plant parts, and the relation of Cs with other elements are expected to lead to better understanding of the mechanisms of Cs absorption and translocation in plants and how they apply to other hazardous elements (e.g., Clemens et al, 2013;Kubo et al, 2011Kubo et al, , 2013. We believe that these efforts will support the rehabilitation and reconstruction of agriculture in areas affected by radioactive Cs.…”

Section: Discussionmentioning

confidence: 99%

Analyses and countermeasures for decreasing radioactive cesium in buckwheat in areas affected by the nuclear accident in 2011

Kubo

Nemoto

Kobayashi

et al. 2015

Field Crops Research

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“…Since even small differences in grain Cd can lead to large differences in cumulative dietary intake, it is of high concern to individuate low accumulating varieties and to recognise varietal traits determining Cd uptake and translocation patterns. Physiological processes contributing to grain-Cd accumulation are: (i) uptake from soil; (ii) translocation to shoot, and (iii) remobilisation from culms and leaves to grain (Kubo et al 2011). High and low grain-Cd accumulating lines were selected both in bread and durum wheat, but a unique mechanism responsible for high or low accumulation has not been identified, yet.…”

mentioning

confidence: 99%

“…It was also hypothesised that low and high grain-Cd accumulation depends on differential Cd binding to organic acids in roots (Stolt et al 2003, Adeniji et al 2010. In bread wheat, high grain-Cd was associated with elevated Cd uptake during early growth, and with high root to shoot translocation, while in durum wheat it was associated with high translocation to the shoot, but not with high uptake (Zhang et al 2002, Greger and Löfsted 2004, Kubo et al 2011.…”

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confidence: 99%

Cadmium uptake and translocation in durum wheat varieties differing in grain-Cd accumulation

Arduini¹,

Masoni²,

Mariotti³

et al. 2014

PLANT SOIL ENVIRON

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Wheat grain products are the primary source of dietary Cd-intake for humans. Since varieties differ markedly in grain-Cd accumulation, efforts are needed to find traits associated with low, or high, accumulation. Two durum wheat varieties, selected in a field screening as low (Creso) and high (Svevo) grain-Cd accumulating, were grown on soil spiked with 1.5, 3 and 4.5 mg Cd/kg. Growth patterns, Cd uptake and translocation were investigated at heading and maturity. Cadmium did not affect plant growth and grain yield, but grain-Cd concentration always exceeded the permissible limit of 0.2 mg Cd/kg, and was approximately double in Svevo than in Creso. At maturity, total Cduptake increased linearly with supply in Creso, from 13 to 23 µg/plant, and was approximately 18 µg/plant, irrespective of Cd level, in Svevo. Partitioning to shoot was higher in Svevo than in Creso, both at heading and maturity. We suggest that reduced plant height, high root to shoot biomass ratio during vegetative growth and elevated postheading dry matter accumulation promoted Cd accumulation into grain. Since these traits are common to modern wheat varieties, risks of grain Cd-contamination can increase in the future.

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Differences in Cadmium Accumulation and Root Morphology in Seedlings of Japanese Wheat Varieties with Distinctive Grain Cadmium Concentration

Cited by 56 publications

References 18 publications

Fractal based complexity analysis of wheat root system under different heavy metals

Fractal based complexity analysis of wheat root system under different heavy metals

Analyses and countermeasures for decreasing radioactive cesium in buckwheat in areas affected by the nuclear accident in 2011

Cadmium uptake and translocation in durum wheat varieties differing in grain-Cd accumulation

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