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稀土与土壤混拌,配制成稀土含量不同的土壤,装纸筒育苗。结果表明,稀土对甜菜生长具有明显的生理效应。稀土处理显著地增加了叶绿素的含量,提高了叶片的光合强度与硝酸还原酶的活性。其中以100ppm和150ppm组的效果最好。在低温条件下,叶片细胞膜的透性随稀土浓度的增加而下降.即叶片的抗寒能力得到提高。甜菜叶片与叶柄中过氧化物酶同工酶谱带的数目及颜色深浅也受稀土的影响而发生变化,这表明.稀土元素在基因表达水平上起作用。
Rare earth and soil mixing, preparation of different soil content of rare earth, loaded paper tube seedling. The results show that rare earth has obvious physiological effects on the growth of sugar beet. Rare earth treatment significantly increased chlorophyll content, increased leaf photosynthetic intensity and nitrate reductase activity. Among them, 100ppm and 150ppm groups had the best effect. Under low temperature conditions, the permeability of leaf cell membrane decreased with the increase of rare earth concentration, that is, the ability of cold resistance of leaves was improved. The number and color depth of peroxidase isoenzyme bands in beet leaf and petiole also changed under the influence of rare earths, suggesting that rare earth elements play a role in gene expression.