La, Nd On The Activity Of Wheat And Rape's Enzymic Activity And In Vivo Study Of Effector

Rare-earth agricultural research in China began in the 20th century, through a large number of agricultural scientific research and field trials, confirms the right amount of rare earth to promote crop production and to improve the quality of results, but the rare-earth farm is how the mechanism of these effects is not yet very clear.In theory, the absorption and utilization of crop mineral elements in the body through its enzyme-related biochemical reactions catalyzed by the corresponding achieved; affect the activity of a variety of crops in vivo biochemical reactions, thereby affecting the crop of mineral nutrients absorption, assimilation and allocation.By influencing the activity of rare earth elements, and the impact of mineral elements in the corresponding absorption, utilization and distribution.This test to wheat and rapeseed crops for trial by water culture methods combined with laboratory analysis, study of rare earth elements lanthanum (La), neodymium (Nd) on wheat seedlings associated enzyme activities in vivo, at the same time scanning using gas chromatography to separate organizations Extracts of organic substances, at the same time its content changes according to the law found.This test-based La (La), neodymium (Nd) compound concentrations were 0mg / L, 5.0mg / L, 10.0mg / L, 25.0mg / L and 50.0mg / L to deal with five. Peroxidase activity in plants was determined by guaiacol oxidation, superoxide dismutase activity was determined by the method of Giannopolitis and Ries.The results show that: low concentrations of lanthanum (La), neodymium (Nd) to varying degrees, in the promotion of wheat seedlings in vivo peroxidase, superoxide dismutase activity in enhancement; high concentration always showed inhibitory activity role.When La, Nd solution concentration of 10mg / L, the SOD activity of aerial parts of wheat to achieve maximum value for the role of the underground sections of La effect is basically the same as with the aerial parts, but the effect of Nd differences, when its concentration of 5mg / L time, SOD activity reached peak.When La, Nd solution concentration of 10mg / L, the wheat on the ground and the underground sections of POD activity reached the maximum, the basic trend is the same as the difference between the percentage changes slightly.Whether part of the underground sections of the ground, POD, or SOD, Nd changes in the rate should be much larger than La, note Nd wheat Effect of in vivo regulation of enzyme strongly than La.Studies have shown that rare earth elements lanthanum, neodymium and roots of wheat and rape on the ground floor part of the site of tissue extract significant impact in the organic matter, and roots of rape obvious effect of organic matter. Separation of thematerial mainlyNonadecane,hexadecanoic-acid,Octadecane,heptacosane,tetracosane,9,12,15-Octacatrienoic acid and so on.