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Effects of grafting on the cadmium accumulation characteristics of the potential Cd-hyperaccumulator Solanum photeinocarpum

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Abstract

The effects of grafting on the cadmium (Cd) accumulation characteristics of the potential Cd-hyperaccumulator Solanum photeinocarpum were studied under Cd stress in our experiment. Four treatments were used in the experiment: ungrafted (UG), self-rooted grafting by the same S. photeinocarpum seedling (SG), self-rooted grafting by two different development stages of S. photeinocarpum seedlings (DG), and grafting on the rootstock of wild potato (PG). SG and DG decreased the root, scion stem, leaf, whole shoot, and whole plant biomasses compared with UG, but increased the rootstock stem biomass, while only PG increased the root and whole plant biomasses. SG and DG increased the Cd contents in the different organs of S. photeinocarpum compared with UG, while PG decreased the Cd content compared with UG. The Cd extraction by the whole plant of S. photeinocarpum was ranked as DG > SG > UG > PG. Additionally, the antioxidant enzyme activities in SG and DG were enhanced compared with UG, while that of PG was reduced compared with UG. The grafting increased the DNA methylation levels and changed the methylation patterns of S. photeinocarpum compared with UG. Therefore, SG and DG can increase the Cd accumulation in S. photeinocarpum, which can be used for the phytoremediation of Cd-contaminated soil.

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    Authors and Affiliations

    1. Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China

      Lijin Lin, Xun Wang, Xiulan Lv, Dong Liang, Hui Xia, Yunsong Lai & Yi Tang

    2. College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China

      Daiyu Yang, Ming’an Liao, Zhihui Wang & Fuyi Tang

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    1. Lijin Lin
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    2. Daiyu Yang
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    3. Xun Wang
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    4. Ming’an Liao
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    5. Zhihui Wang
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    8. Dong Liang
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    10. Yunsong Lai
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    Correspondence to Ming’an Liao.

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    Lijin Lin and Daiyu Yang contributed equally to this work.

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    Lin, L., Yang, D., Wang, X. et al. Effects of grafting on the cadmium accumulation characteristics of the potential Cd-hyperaccumulator Solanum photeinocarpum . Environ Monit Assess 188, 82 (2016). https://doi.org/10.1007/s10661-015-5084-3

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    • DOI: https://doi.org/10.1007/s10661-015-5084-3

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