Aeration Increases Cadmium (Cd) Retention by Enhancing Iron Plaque Formation and Regulating Pectin Synthesis in the Roots of Rice (Oryza sativa) Seedlings

Li, Hubo; Zheng, Xiuwen; Tao, Longxing; Yang, Yongjie; Gao, Lei; Xiong, Jie

doi:10.1186/s12284-019-0291-0

Cited by 47 publications

(17 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1, with Cd treatment, the Cd concentrations in the root would be higher than 2000 mg kg −1 dw, and those in the shoot were approaching to 500 mg kg −1 dw. The ranges of Cd concentrations in rice seedlings were also found in the recent studies by using (Chiao et al 2019;Li et al 2019). The TF values, that almost all were less than 0.2, indicated that most of the Cd uptake by rice plants was accumulated in the root rather than being transferred to the shoot.…”

Section: The Cultivar Variations In CD Toxicity and Distribution In Rsupporting

confidence: 69%

“…In the early study, Zhang and Duan (2008) have ever used the treatment of 50 µM Cd in hydroponics to investigate the genotypic difference in Cd accumulation. Recently, the same treatment level of 50 µM Cd was also used by Li et al (2019) for investigation of Cd retention in the roots of rice seedlings. The treatment level of 50 µM Cd in hydroponics could result a significant reduction in root and shoot growths and increases of plant Cd concentrations for the different rice cultivars (Shi et al 2005;Zhang and Duan 2008).…”

Section: Plant Materials and CD Treatment In Hydroponicsmentioning

confidence: 99%

“…It will be a promising way for the protection of rice consumption safety to develop rice genotypes of low-Cd-accumulation in grain by breeding (Ishikawa et al 2005 ; Grant et al 2008 ). According to recently, understandings of Cd transport mechanisms in rice plant (Uraguchi and Fujiwara 2012 ; Li et al 2017 ), the fast development of molecular biology resulted in the transgenic rice (Takahashi et al 2011 ) and rice mutants (Ishikawa et al 2012 ) to reduce the Cd uptake by plant and accumulation in grain. It will be a long term to make efforts by the genetic engineer for the development of low-Cd accumulation rice genotypes, which can take the place of the currently consuming cultivars.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Aspects of cultivar variation in physiological traits related to Cd distribution in rice plants with a short-term stress

et al. 2020

View full text Add to dashboard Cite

Background Genotypic variations are seen in cadmium (Cd) tolerance and accumulation in rice plants. Cultivars that show low Cd translocation from the root into shoot can be selected to reduce Cd contamination in rice grains. This study aims to clarify the physiological regulation related to Cd absorption by rice plants for screening out the cultivars, which have relatively low Cd accumulation in grains. Eight Taiwan mega cultivars of paddy rice: japonica (TY3, TK9, TNG71, and KH145 cultivars), indica (TCS10 and TCS17 cultivars), and glutinous (TKW1 and TKW3 cultivars), which are qualified with the criteria for rice grain quality by the Council of Agriculture, Taiwan, were used for illustration. An experiment in hydroponics was conducted for the rice seedlings with a treatment of 50 μM CdCl2 for 7 days. Results and discussion After the Cd treatment, the reductions in shoot growth were more significant than those in root growth; however, Cd absorbed in the rice plant was sequestered much more in the root. The malondialdehyde (MDA) was preferentially accumulated in rice root but the hydrogen peroxide (H2O2) was increased more significantly in the shoot; the antioxidative enzymes, superoxide dismutase (SOD) and ascorbate peroxidase (APX), were pronounced more in rice shoot. Conclusions The rice cultivars preferentially accumulated Cd in the root rather than the shoot with the Cd treatment, which resulted in significant enhancements of MDA and growth reductions in the root. However, H2O2 accumulation was toward the shoot to retard shoot growth suddenly and then the root could keep a gradual growth. Also, the rice cultivars, which preferentially accumulate Cd in the root, would have the regulation tendency of SOD toward the shoot. Due to that SOD is responsible for H2O2 production, H2O2 accumulation would be thus toward the shoot. Moreover, the cultivars, which have a less regulation tendency of APX toward the shoot, would present higher translocation of Cd into the shoot.

show abstract

Section: The Cultivar Variations In CD Toxicity and Distribution In Rsupporting

confidence: 69%

Section: Plant Materials and CD Treatment In Hydroponicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Aspects of cultivar variation in physiological traits related to Cd distribution in rice plants with a short-term stress

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Prior to O 2 flux measurement, the microsensor should be calibrated with measuring solution (0.1 mM KCl, 0.1 mM CaCl 2 , 0.1 mM MgCl 2 , 0.5 mM NaCl, 0.3 mM MES, 0.2 mM Na 2 SO 4 , pH 6) containing different concentrations of O 2 (N-saturated and control cultural media). Only when the Std Curve is between −2000~−9000 pA/mM can the microsensor be placed in the blank measuring solution for polarization for 1 h, until the net O 2 flux is near baseline, at which time the microsensor can be used [ 31 ].…”

Section: Methodsmentioning

confidence: 99%

The Role of Cyanobacterial External Layers in Mass Transfer: Evidence from Temperature Shock Experiments by Noninvasive Microtest Technology

Yan¹,

Liu²,

Li³

et al. 2020

Microorganisms

View full text Add to dashboard Cite

Groundwork on cyanobacterial external layers is crucial for an improved understanding of the persistent dominance of cyanobacteria in freshwaters. In this study, the role of two morphotypes of external layers in Microcystis and Nostoc in mass transfer and instantaneous temperature shock were explored by noninvasive microtest technology (NMT) after a series of pretreatments, to obtain the external layers retained or stripped samples. The results showed no statistical influence on photosynthetic activity between retained and stripped samples in both Microcystis and Nostoc. External-layer-retaining strains had higher net O2 effluxes than stripped strains. Moreover, the net NH4+ influx was significantly higher for the sheath retaining Nostoc than for the stripped sample, indicating that external layers might be an important feature driving mass transfer in cyanobacteria. However, the role of slime in NH4+ absorption was limited compared with that of sheath. In addition, external-layer-retaining strains exhibited a longer response time to instantaneous temperature shock, greater net O2 effluxes at a 4 °C shock and lower net O2 influx at a 35 °C shock, which were interpreted as reflecting a tolerance to temperature fluctuation over short time scales via a buffer function of external layers to stabilize cell activity, ameliorating the efficiency of photosynthesis and respiration. These results advance current knowledge regarding the external layers, especially the dense sheath, involved in the mass transfer in cyanobacteria, and provide new clues concerning the adaptive strategies of cyanobacteria under global climate changes.

show abstract

“…In the early study, Zhang and Duan (2008) have ever used the treatment of 50 µM Cd in hydroponics to investigate the genotypic difference in Cd accumulation. Recently, the same treatment level of 50 µM Cd was also used by Li et al (2019) for investigation of Cd retention in the roots of rice seedlings. The treatment level of 50 µM Cd in hydroponics could result a signi cant reduction in root and shoot growths and increases of plant Cd concentrations for the different rice cultivars (Shi et al, 2005;Zhang and Duan, 2008).…”

Section: Plant Materials and CD Treatment In Hydroponicsmentioning

confidence: 99%

Aspects of cultivar variation in physiological traits related to Cd distribution in rice plants with a short-term stress

Chiao¹,

Chen

Syu

et al. 2020

Preprint

View full text Add to dashboard Cite

Background Genotypic variations are seen in cadmium (Cd) tolerance and accumulation in rice plants. Cultivars that show low Cd translocation from the root into shoot can be selected to reduce Cd contamination in rice grains. This study aims to clarify the physiological regulation related to Cd absorption by rice plants for screening out the cultivars, which have relatively low Cd accumulation in grains. Eight Taiwan mega cultivars of paddy rice: japonica (TY3, TK9, TNG71, and KH145 cultivars), indica (TCS10 and TCS17 cultivars), and glutinous (TKW1 and TKW3 cultivars), which are qualified with the criteria for rice grain quality by the Council of Agriculture, Taiwan, were used for illustration. An experiment in hydroponics was conducted for the rice seedlings with a treatment of 50 μM CdCl 2 for 7 days. Results and discussion After the Cd treatment, the reductions in shoot growth were more significant than those in root growth; however, Cd absorbed in the rice plant was sequestered much more in the root. The malondialdehyde (MDA) was preferentially accumulated in rice root but the hydrogen peroxide (H 2 O 2 ) was increased more significantly in the shoot; the antioxidative enzymes, superoxide dismutase (SOD) and ascorbate peroxidase (APX), were pronounced more in rice shoot. Conclusions The rice cultivars preferentially accumulated Cd in the root rather than the shoot with the Cd treatment, which resulted in significant enhancements of MDA and growth reductions in the root. However, H 2 O 2 accumulation was toward the shoot to retard shoot growth suddenly and then the root could keep a gradual growth. Also, the rice cultivars, which preferentially accumulate Cd in the root, would have the regulation tendency of SOD toward the shoot. Due to that SOD is responsible for H 2 O 2 production, H 2 O 2 accumulation would be thus toward the shoot. Moreover, the cultivars, which have a less regulation tendency of APX toward the shoot, would present higher translocation of Cd into the shoot.

show abstract

Aeration Increases Cadmium (Cd) Retention by Enhancing Iron Plaque Formation and Regulating Pectin Synthesis in the Roots of Rice (Oryza sativa) Seedlings

Cited by 47 publications

References 78 publications

Aspects of cultivar variation in physiological traits related to Cd distribution in rice plants with a short-term stress

Aspects of cultivar variation in physiological traits related to Cd distribution in rice plants with a short-term stress

The Role of Cyanobacterial External Layers in Mass Transfer: Evidence from Temperature Shock Experiments by Noninvasive Microtest Technology

Aspects of cultivar variation in physiological traits related to Cd distribution in rice plants with a short-term stress

Contact Info

Product

Resources

About