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Effects of reciprocal hybridization on cadmium accumulation in F1 hybrids of two Solanum photeinocarpum ecotypes
Authors:Lin  Lijin  Wu  Caifang  Wang  Jin  Liao  Ming’an  Yang   Daiyu  Deng   Honghong  Lv   Xiulan  Xia   Hui  Liang   Dong  Deng   Qunxian
Affiliation:1.Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, 611130, China
;2.College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
;3.Ya’an Poverty Alleviation and Immigration Bureau, Ya’an, 625000, China
;
Abstract:

In this study, farmland and mining ecotypes of Solanum photeinocarpum (a potential cadmium (Cd) hyperaccumulator plant) were reciprocally hybridized each other, and the Cd accumulation characteristics of the F1 hybrids were studied. In pot experiments, higher biomasses and Cd extraction abilities were found for two S. photeinocarpum F1 hybrids than for the parents, but the Cd contents in various organs were lower in the hybrids than the parents. However, the differences between the Cd contents in the two hybrids were not significant. The antioxidant enzyme (superoxide dismutase and peroxidase) activities were higher for the S. photeinocarpum F1 hybrids than the parents. Less DNA methylation was found in the hybrids than the parents because more demethylation occurred in the hybrids than the parents. The biomass, Cd content, and Cd extraction ability effects in field experiments were similar to the effects in the pot experiments. It was concluded that reciprocally hybridizing different S. photeinocarpum ecotypes improved the ability of S. photeinocarpum to be used to phytoremediate contaminated land.

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