Effects of mutual grafting Solanum photeinocarpum from two ecosystems on physiology and selenium absorption of their offspring under selenium stress

The mutual grafting affecting the physiological characteristics and selenium (Se) absorption capacity in offspring of Solanum photeinocarpum from the farmland and mining ecosystems were studied by the pot experiments. The mutual grafting significantly increased the dry biomass, antioxidant enzyme activity, and soluble protein content in offspring of S. photeinocarpum from the farmland ecosystem, while the activities of superoxide dismutase and catalase in offspring of S. photeinocarpum from the mining ecosystem were inhibited than the ungrafted S. photeinocarpum. It was observed that the photosynthetic pigment level of S. photeinocarpum offspring from the farmland ecosystem was lower than the ungrafted S. photeinocarpum to varying degrees. Besides, mutual grafting not only increased the Se concentration of S. photeinocarpum offspring, but also significantly promoted the amount of extracted Se by S. photeinocarpum offspring. The shoots Se extraction and dry biomass of S. photeinocarpum offspring with combination of S. photeinocarpum from the mining ecosystem / S. photeinocarpum from the farmland ecosystem reached the maximum level, thereby promoting the growth and Se accumulation capacity of S. photeinocarpum offspring than another grafting combination.