Isozyme of different ecotypes of Picea mongolica

Picea mongolica W. D. Xu is an endemic tree species in Inner Mongolia Autonomous Region, China, and it is found only at eastern edge of the Hunshandake sandy land and with three ecotypes, that is, f. purpurea f. nov, f. rubra f. nov and f. viridis f. nov, due to its adaptation to drought for a long time. At the same time, the three ecotypes are quite different in ecological and physiological characters. Based on PAGE, zymogram of peroxidase and lipase isozyme of the three ecotypes P. mongolica were studied, and the result showed that no matter what peroxidase isozyme or lipase isozyme was, there were the same phenomena. f. purpurea f. nov Picea mongolica possessed most enzyme belts, then the f. rubra f. nov and the f. viridis f. nov had lest enzyme belts. As far as the intensity of enzyme belts were concerned, the f. purpurea f. nov had more strong, secondarily strong, and medium enzyme belts, and the f. viridis f. nov had fewer. It proved that the f. purpurea f. nov had the strongest drought resistance, and the f. viridis f. nov had the lowest. The conclusion could be applied as scientific basis for management and selection of P. mongolica. Fig 2, Ref 21.