Abstract
The objective of this paper is to research the effects of CdCl2 treatment on mineral elements and amino acids in leaves of Malus hupehensis var. pingyiensis. The seedlings of Malus hupehensis var. pingyiensis with 6 leaf were cultured in 1/2 Hoagland nutrient solutions of different CdCl2 treatments (0, 0.5, 5 and 10 mg·L-1), respectively. The mineral elements and amino acids of the leaves in Malus hupehensis var. pingyiensis were measured in the day 30. Compared with the control (0 mg·L-1 CdCl2), the treatments significantly decreased the contents of Mg, Fe and Zn in the tested leaves and obviously increased the contents of Cd in the experimental leaves. As to Ca and Mn, low concentration Cd treatment (0.5 mg·L-1 CdCl2) promoted their absorption, however, high concentration Cd treatments (5 and 10 mg·L-1 CdCl2) inhibited their absorption. The metabolism pathway and content of amino acids in the Malus hupehensis var. pingyiensis leaves under Cd treatment were modified, the content of amino acids in the glycolate pathway became larger than that in control, the content of amino acids in the pyruvic acid synthesis pathway and tyrosine and phenylalanine became smaller than that in control, the content of other amino acids also had made a certain degree change. The results provided the important basis for safety production and quality evaluation of leaves in Malus hupehensis var. pingyiensis.
Highlights
The content of Cd released by people in the world in the near 50 years reached about 22,000 t [1], a large number of Cd got into soils, and caused the heavy metal pollution of farmland, which became an important source of heavy metal farmland pollution
The objective of this paper is to research the effects of CdCl2 treatment on mineral elements and amino acids in leaves of Malus hupehensis var. pingyiensis
The results provided the important basis for safety production and quality evaluation of leaves in Malus hupehensis var. pingyiensis
Summary
The content of Cd released by people in the world in the near 50 years reached about 22,000 t [1], a large number of Cd got into soils, and caused the heavy metal pollution of farmland, which became an important source of heavy metal farmland pollution. Quality is a vital indictor of tea traits in the process of production. Mineral elements such as Ca, Mg, Fe, Mn, Zn were important macroelement and microelement needed by human body, the amino acid was one of macromolecules with multitudinous biological activity of biological organism, both of them should go hand in hand with quality of tea. What happened to the mineral elements and amino acid of leaves in Malus hupehensis var. Change of mineral elements and amino acids in Malus hupehensis var. Pingyiensis leaves under Cd treatment were studied, the results will provide the important basis for safety production and quality evaluation of leaves in Malus hupehensis var. Change of mineral elements and amino acids in Malus hupehensis var. pingyiensis leaves under Cd treatment were studied, the results will provide the important basis for safety production and quality evaluation of leaves in Malus hupehensis var. pingyiensis
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