Ammonium mitigates Cd toxicity in rice (Oryza sativa) via putrescine-dependent alterations of cell wall composition

Zhu, Chun Quan; Cao, Xiaochuang; Hu, Wengang; Hu, An Yong; Bai, Zhi Gang; Zhong, Chen; Sun, Li; Liang, Qing; Huang, Jie; Yang, Shun Xi; Zhang, Jun Hua; Jin, Qian

doi:10.1016/j.plaphy.2018.09.005

Cited by 40 publications

(16 citation statements)

References 64 publications

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“…6) indicated that the CW pectin derived from carbohydrates might have a higher degree of demethylation. This potentially produces greater numbers of free functional groups with negative charges, which are essential for binding of cation ions and hence for binding and detoxification of Cd (Zhu et al , 2018). To further confirm our hypothesis, we used a UHPLC-MS platform to characterize the differential metabolites between the two genotypes.…”

Section: Discussionmentioning

confidence: 99%

A multiomics approach reveals the pivotal role of subcellular reallocation in determining rapeseed resistance to cadmium toxicity

Zhang

Zhou

Tang

et al. 2019

Journal of Experimental Botany

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Section: Discussionmentioning

confidence: 99%

A multiomics approach reveals the pivotal role of subcellular reallocation in determining rapeseed resistance to cadmium toxicity

Zhang

Zhou

Tang

et al. 2019

Journal of Experimental Botany

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“…Furthermore, higher shoot translocation and bioconcentration factors were observed in inoculated plants compared with urea-treated plants (Table 4), suggesting that inoculation facilitated Cu phytoextraction [23]. Urea treatment had the lowest transfer coefficient value, similar to NH 4 + -N. It has been demonstrated that, when NH 4 + is present as the sole N source, the internal transfer of Cd 2+ from root to shoot in rice is inhibited through suppression of the metal transporter genes OsNramp5 (the major transporter associated with Cd/Mn uptake in rice) and OsHMA2 (transporter of Cd 2+ /Zn 2+ from root to shoot) [56]. We conclude that rhizobium inoculation alone improved the efficiency of phytoextraction due to the observed increase in biomass accumulation and the small variability of Cu concentration.…”

Section: Discussionmentioning

confidence: 99%

Impact of Urea Addition and Rhizobium Inoculation on Plant Resistance in Metal Contaminated Soil

Shen

Liu

et al. 2019

IJERPH

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Legume-rhizobium symbiosis has been heavily investigated for their potential to enhance plant metal resistance in contaminated soil. However, the extent to which plant resistance is associated with the nitrogen (N) supply in symbiont is still uncertain. This study investigates the effect of urea or/and rhizobium (Sinorhizobium meliloti) application on the growth of Medicago sativa and resistance in metals contaminated soil (mainly with Cu). The results show that Cu uptake in plant shoots increased by 41.7%, 69%, and 89.3% with urea treatment, rhizobium inoculation, and their combined treatment, respectively, compared to the control group level. In plant roots, the corresponding values were 1.9-, 1.7-, and 1.5-fold higher than the control group values, respectively. Statistical analysis identified that N content was the dominant variable contributing to Cu uptake in plants. Additionally, a negative correlation was observed between plant oxidative stress and N content, indicating that N plays a key role in plant resistance. Oxidative damage decreased after rhizobium inoculation as the activities of antioxidant enzymes (catalase and superoxide dismutase in roots and peroxidase in plant shoots) were stimulated, enhancing plant resistance and promoting plant growth. Our results suggest that individual rhizobium inoculation, without urea treatment, is the most recommended approach for effective phytoremediation of contaminated land.

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“…In rice, NH 4 + -N supplementation mitigates cadmium stress by inhibiting the uptake and transport of the metal. NH 4 + -N also increased rice and maize drought tolerance (Smiciklas and Below, 1992;Gao et al, 2009;Wu et al, 2018;Zhu et al, 2018). In contrast to the numerous studies focusing on the effects of various forms of exogenous N on root growth and nutrient element transport, research on the effects of various forms of N applied under abiotic stress on wheat grain filling is relatively sparse.…”

Section: Introductionmentioning

confidence: 99%

Effect of Foliar Application of Various Nitrogen Forms on Starch Accumulation and Grain Filling of Wheat (Triticum aestivum L.) Under Drought Stress

Ding

Long

et al. 2021

Front. Plant Sci.

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Foliar nitrogen (N) fertilizer application at later stages of wheat (Triticum aestivum L.) growth is an effective method of attenuating drought stress and improving grain filling. The influences or modes of action of foliar application of various nitrogen forms on wheat growth and grain filling need further research. The objective of this study was to examine the regulatory effects of various forms of foliar nitrogen [NO3–, NH4+, and CO(NH2)2] on wheat grain filling under drought stress and to elucidate their underlying mechanisms. The relative effects of each nitrogen source differed in promoting grain filling. Foliar NH4+-N application notably prolonged the grain filling period. In contrast, foliar application of CO(NH2)2 and NO3–-N accelerated the grain filling rate and regulated levels of abscisic acid (ABA), z-riboside (ZR), and ethylene (ETH) in wheat grains. Analysis of gene expression revealed that CO(NH2)2 and NO3–-N upregulated the genes involved in the sucrose–starch conversion pathway, promoting the remobilization of carbohydrates and starch synthesis in the grains. Besides, activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were increased, whereas the content of malondialdehyde (MDA) declined under foliar nitrogen application (especially NH4+-N). Under drought stress, enhancement of carbohydrate remobilization and sink strength became key factors in grain filling, and the relative differences in the effects of three N forms became more evident. In conclusion, NH4+-N application improved the antioxidant enzyme system and delayed photoassimilate transportation. On the other hand, foliar applications of NO3–-N and CO(NH2)2 enhanced sink capacity and alleviated drought stress injury in wheat.

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Ammonium mitigates Cd toxicity in rice (Oryza sativa) via putrescine-dependent alterations of cell wall composition

Cited by 40 publications

References 64 publications

A multiomics approach reveals the pivotal role of subcellular reallocation in determining rapeseed resistance to cadmium toxicity

A multiomics approach reveals the pivotal role of subcellular reallocation in determining rapeseed resistance to cadmium toxicity

Impact of Urea Addition and Rhizobium Inoculation on Plant Resistance in Metal Contaminated Soil

Effect of Foliar Application of Various Nitrogen Forms on Starch Accumulation and Grain Filling of Wheat (Triticum aestivum L.) Under Drought Stress

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