Isolation and identification of rapeseed (<i>Brassica napus</i>) cultivars for potential higher and lower Cd accumulation

Zhang, Xian Duo; Wang, Ye; Li, Hai Bo; Yang, Zhi Min

doi:10.1002/jpln.201700531

Cited by 20 publications

(6 citation statements)

References 38 publications

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“…Measuring Cd concentration in 69 rice accessions, Uraguchi et al (2009b) found strong correlations between Cd levels in the xylem sap and in shoots and grains. Zhang et al (2018) obtained similar results in the case of rape (B. napus). Harris and Taylor (2013) demonstrated the importance of root-to-shoot translocation in the accumulation of Cd in durum wheat grain.…”

Section: B Transport In the Xylemsupporting

confidence: 59%

Mechanisms of Cadmium Accumulation in Plants

Sterckeman

Thomine

2020

Critical Reviews in Plant Sciences

173

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Cadmium is a non-essential trace metal, which is highly toxic to nearly all living organisms. Soil pollution causes Cd contamination of crops, thereby rendering plant products responsible for the chronic low level Cd over-exposure of numerous populations in the world. For this reason, Cd accumulation in plants has been studied for about five decades now. The research first focused on the relationships between plant and soil Cd levels, on the factors of the metal availability in soil, as well as the root uptake processes. Cd distribution in plant organs was also investigated, first using a macroscopic and eco-physiological approach, then with the help of molecular biology tools, at both tissue and cell scale. Cadmium has no biological function and hijacks the transport pathways of micronutrients such as Fe, Mn or Zn, in order to enter the plant through the roots and be distributed to all its organs. The study of the genes that control the influx and efflux of the Cd 2 + ion in the cytosol, vacuoles and vascular tissues has significantly contributed to the understanding of the metal root uptake and of its transfer to the aerial parts. However, the mechanisms responsible for its distribution to the different aboveground tissues and specially to fruits and seeds have yet to be clarified. This review summarizes current knowledge in order to present a detailed overview of Cd transport and storage, from the rhizosphere to the different organs and tissues of the plant.

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Section: B Transport In the Xylemsupporting

confidence: 59%

Mechanisms of Cadmium Accumulation in Plants

Sterckeman

Thomine

2020

Critical Reviews in Plant Sciences

173

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“…Studies have shown that rapeseed was regarded as a high Cd-accumulating plant mainly due to the high accumulation of Cd in nonedible parts. , As this study and other previous study of Yang et al have shown, the seed meal sequestrated Cd. Hence, only a significant small fraction of Cd was transferred to the oil (0.8% of the Cd in shoots).…”

Section: Resultssupporting

confidence: 70%

“…Oilseed rape (Brassica napus L.) is one of the staple oil crops in China and Europe with strong Cd accumulation , in no-edible parts . The characteristics of oilseed rape make it a good candidate for soil Cd remediation. , The main economic value of rapeseed comes from rapeseed oil extraction, and the large biomass of oilseed rape may be used for ethanol, biochar, and biofuel production by hydrolysis, pyrolysis, and fermentation. , It is important to evaluate the risk of Cd in oil and seed meal, especially from heavily polluted farmlands.…”

Section: Introductionmentioning

confidence: 99%

Cadmium Distribution, Availability, and Translocation in Soil-Oilseed Rape (Brassica napus L.) System and Its Risk Assessment

Zhang

Tao

Nie

et al. 2022

ACS Earth Space Chem.

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Proper utilization of lightly contaminated farmlands is popular for developing countries such as China where there are high demands for food production to meet the needs of high population in the limited available arable lands. Oilseed rape (Brassica napus L.) is an important oil crop as well as a potential candidate for soil Cd remediation. Dietary oil ingestion is the main route of human exposure to cadmium (Cd). Therefore, understanding the characteristics of Cd transfer in the soil-oilseed rape system and its human health risk assessment are crucial for health risk alleviation and pollution control. A field experiment was conducted with 25 oilseed rape cultivars grown in a Cd (1.59 mg kg −1 )-contaminated farmland where Cd was mainly from former mining activities in nearby mountains. Results showed that Cd concentrations in oilseed rape were in the order of shoots > roots > pods > seeds. The mean values of both transfer factors and bioaccumulation factors were higher than 1. Residual Cd fraction accounted for the largest proportion of the four solid components (fractions) of Cd. Cd concentration in oil ranged from 0.004 to 0.06 mg kg −1 . In vitro digestion study showed that the bioaccessibility of Cd in rapeseed oil ranged from 2.48 to 30.6%. The target hazard quotients of Cd and hazard index via oil intake were below 1, and the incremental lifetime cancer risks of Cd were within the required values of 1 × 10 −6 −1 × 10 −4 . This study suggests the safety limit of Cd in rapeseed oil as 0.18 mg kg −1 based on the comparison of the carcinogenic and noncarcinogenic risks. Conclusively, oilseed rape has a good Cd accumulation capability, but the most grain Cd in plants grown in the lightly Cd-polluted soil remained non-bioaccessible with a negligible noncarcinogenic risk and an acceptable level of carcinogenic risk to human health.

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“…Hyperaccumulators can be used for phytoremediation and also for phytomining [4,14,15,16]. Phytoremediation is a cost-effective and environmentally-friendly technology that uses plants to remove the toxic metals from soils; it has been widely used in practice [14,17].…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll Fluorescence Imaging Analysis for Elucidating the Mechanism of Photosystem II Acclimation to Cadmium Exposure in the Hyperaccumulating Plant Noccaea caerulescens

et al. 2018

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We provide new data on the mechanism of Noccaea caerulescens acclimation to Cd exposure by elucidating the process of photosystem II (PSII) acclimation by chlorophyll fluorescence imaging analysis. Seeds from the metallophyte N. caerulescens were grown in hydroponic culture for 12 weeks before exposure to 40 and 120 μM Cd for 3 and 4 days. At the beginning of exposure to 40 μM Cd, we observed a spatial leaf heterogeneity of decreased PSII photochemistry, that later recovered completely. This acclimation was achieved possibly through the reduced plastoquinone (PQ) pool signaling. Exposure to 120 μM Cd under the growth light did not affect PSII photochemistry, while under high light due to a photoprotective mechanism (regulated heat dissipation for protection) that down-regulated PSII quantum yield, the quantum yield of non-regulated energy loss in PSII (ΦNO) decreased even more than control values. Thus, N. caerulescens plants exposed to 120 μM Cd for 4 days exhibited lower reactive oxygen species (ROS) production as singlet oxygen (1O2). The response of N. caerulescens to Cd exposure fits the ‘Threshold for Tolerance Model’, with a lag time of 4 d and a threshold concentration of 40 μM Cd required for the induction of the acclimation mechanism.

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Isolation and identification of rapeseed (Brassica napus) cultivars for potential higher and lower Cd accumulation

Cited by 20 publications

References 38 publications

Mechanisms of Cadmium Accumulation in Plants

Mechanisms of Cadmium Accumulation in Plants

Cadmium Distribution, Availability, and Translocation in Soil-Oilseed Rape (Brassica napus L.) System and Its Risk Assessment

Chlorophyll Fluorescence Imaging Analysis for Elucidating the Mechanism of Photosystem II Acclimation to Cadmium Exposure in the Hyperaccumulating Plant Noccaea caerulescens

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