Effects Of Plant Growth Compound Regulator On Protein Metabolism During Leaf Senescence Of Corn

The studies were carried out in the Scientific&Educational Park test base of Henan Agriculture University from 2013 to 2014.The study used different genotype maize Zhengdan 958 and Xundan 20 as the materials, three kinds of complex plant growth regulator(independent research) were dealt with the two materials before planting seed mixing and bell stage spraying treatment, so we can study the changes of protein metabolism in the process of corn leaf senescence.1. Composite plant growth regulator affected corn leaf soluble protein and free Amino acid content in the aging process Three kinds of complex plant growth regulator can inordinately improve the leaf soluble protein and he free amino acid content in different historical periods and retard the trend of soluble protein decreased. As to different leaf position, the decreased trend of 5 leaves and 10 leaves were higher than the upper leaves, Xundan20 was higher than Zhengdan 958.Analysis of variance showed that processing of A leaf soluble protein content was higher than the control group(CK), and reached significant level.2. Composite plant growth regulator affected nitrogen assimilation capacity in maize leaf aging process The activity of nitrate reductase(NR), glutamine synthetase(GS), glutamate synthase(incorporated) and glutamate dehydrogenase(GDH) were Unimodal trends in Leaf senescence process. The peak value of NR、GS、GOGAT were in leaf function period, GDH peak value appeared in ageing, For the peak of GDH appeared in the period of aging, the nitrogen metabolism in leaves of maize can still maintain the balance to some extent in the decrease of activity of GS and GOGAT, it also improve the transfer efficiency of protein hydrolysis nitrogen cycle. same change trend between different leaf position.Three kinds of complex plant growth regulator can inordinately improve nitrogen assimilation enzyme activity and can make enzyme high activity for longer periods.Therefore the nitrogen assimilation and transfer ability of corn growth anaphase were improved, it can provide the corn leaf organic matter accumulation and transfer conditions.3. Composite plant growth regulator affected proteolytic enzyme activity in the process of corn leaf senescence In the process of corn leaf senescence, with the advancement of leaf growth period,proteolytic enzyme activity was on escalating trend,, reached the maximum in the stage of exhaustion. At the same time between each leaf, the proteolytic enzyme activity was 14 leaf > 18 leaf > 10 leaf > 5 level position. Proteolytic enzymes of Xundan 20 in the failure stage increased by 8.76 and 5.43% respectively in the A treatment and B treatment, and the proteolytic enzymes of Zheng Dan 958 in the failure stage increased 8.28 and 7.20% respectively.4.Composite plant growth regulator affected corn leaf function period and the influence of maize yield Three kinds of complex plant growth regulator can inordinately extended the corn leaf age and photosynthetic function period, and can adjust senescence phase and stage of exhaustion. Especially in the extension of the upper leaf function period can increase production. Improving maize yield components of different level can enhance maize yield. From the production effect, A was The best,then the B. Xundan 20 and Zhengdan 958 compared with CK, the yield were increased by 9.71% and 10.17%, respectively.