Studies On The Correlation Among The Contents Of The Mineral Nutrition And The Activities Of SOD,Photosynthetic Rate In Walnut

The contents of the mineral nutrition(K Ca Mg Cu Fe Mn Zn)in branches and leaves of walnut(including Xinjiang-genian walnut and Fenyang-mian walnut) were measured during the period of dormancy and growth, and the activities of SOD, photosynthetic rate in the leaves were also measured during the period of grow, and analyzed the correlation among them were analyzed . The results were as follows:(1) During dormant period, the contents of seven mineral nutrition in different branches of Xinjiang-genian walnut were all higher than those of Fenyang-mian walnut .The Contents of mineral nutrition in fertile branch were all higher than those of the others branches.(2) During the period of growth, the variation of the contents of mineral nutrition in branches and leaves were different regularity, the content of K in leaves and branches dropped with the increasing of the leaves age, those of Ca Mg in the branches increased at former stage and dropped at later stage, whereas in the leaves that increased with the increasing of the leaves age; the variation of the contents of Cu Fe Mn Zn in the branches and leaves were relatively stable.(3) The activities of SOD in the young leaves were higher than that of the old leaves in varieties walnuts .It could remove the injure of free radicals for the young leaves, and could increase damage for the old leaves. The peak of activities of SOD in Xinjiang-genian walnut was higher than that of Fenyang-mian walnut. It indicated that there were different reactions to the effect of environment in different varieties.(4) The curves of the change of the photosynthetic rate shown double peak for two varieties, and the first peak was higher than the second peak. The photosynthetic rate of Xinjiang-genian walnut higher than that of Fenyang-mian walnut. Perhaps this is a cause of early fruiting and high yield for Xinjiang-genian walnut.(5) The correlations among the mineral nutrition, the activities of SOD and thephotosynthetic rate indicate: at the growth period, the positive correlation between the activities of SOD and Ca Mg Cu Mn Zn were significant or every significant in the leaves, and the correlation between the activities of SOD and the content of K wad negative in the early period. And positive in the late time, it is contrary to Fe; In different varieties, the correlation between the contents of mineral nutrition and the photosynthetic rate were different; the correlation between the activity of SOD and photosynthetic rate were negative correlation in fruiting branches of Xinjiang-genian walnut, But that were every positive in extending shoots from 19 June to 29 September.(6) The correlations among the contents of the mineral nutrition in different braches and leaves of the different varieties were different. The correlation among the contents of Mg and K Ca Cu were negative in the leaves of fertile branches of Xinjiang-genian walnut; The correlation among the contents of Ca Mg and Cu, K and Mn were very negative significant, Mn and Zn was very positively significant in the branches; the correlation between Zn and the other elements were not significant in the leaves of the extending shoots, and the correlation among microelement were all very positive in the branches. The negative correlation among the contents of Zn and the other elements were not significant in the leaves of the fertile branches of Fenyang-mian walnut; the correlations among the contents of K Ca Mg were very significant positive in the branches, and those of the contents of K Cu and Ca Mg Fe Mn Zn were negative in the leaves of extending shoots, and the content of Ca and Mg Cu Fe Mn Zn were all negative in the branches. In other words, there were certain synergism or antagonistic effect among the elements.The analysis of the different correlation indicate that the physiological mechanisrh of the nutrition metabolize in two varieties tested was relative to genetic characteristic. In addition, it was also controlled many physiological factors. For example, the activities of th...