title: Effects of grafting on the cadmium accumulation characteristics of the potential Cd-hyperaccumulator Solanum photeinocarpum.
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.
authors.affiliation: Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
authors.forename: Lijin
authors.initials: L
authors.lastname: Lin
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
authors.forename: Daiyu
authors.initials: D
authors.lastname: Yang
authors.affiliation: Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
authors.forename: Xun
authors.initials: X
authors.lastname: Wang
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China. lman@sicau.edu.cn.
authors.forename: Ming'an
authors.initials: M
authors.lastname: Liao
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
authors.forename: Xiulan
authors.initials: X
authors.lastname: Lv
authors.affiliation: College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
authors.forename: Fuyi
authors.initials: F
authors.lastname: Tang
authors.affiliation: Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Liang
authors.affiliation: Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Xia
authors.affiliation: Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
authors.forename: Yunsong
authors.initials: Y
authors.lastname: Lai
authors.affiliation: Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Tang
mesh_terms: D001673:Biodegradation, Environmental; D018533:Biomass; D002104:Cadmium / Q000032:analysis* / Q000378:metabolism; D004784:Environmental Monitoring; D018515:Plant Leaves / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D036226:Seedlings; D012989:Soil Pollutants / Q000032:analysis* / Q000378:metabolism; D032322:Solanum / Q000502:physiology*
chemical_list: D012989:Soil Pollutants; D002104:Cadmium
keywords: Cadmium; DNA methylation; Grafting; Phytoremediation; Solanum photeinocarpum