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以“洛阳红”和“乌龙捧盛”牡丹盆栽苗为试材,研究了逐渐干旱及复水过程中牡丹叶片中渗透调节物质及MDA含量的变化。结果表明:随着水分胁迫程度的增加,2种牡丹的可溶性蛋白质含量呈先升高后降低的趋势;2种牡丹的可溶性糖含量、脯氨酸含量和MDA含量均呈逐渐升高的趋势。相比于重度干旱胁迫,复水后2种牡丹的渗透调节物质含量均有所降低,除“乌龙捧盛”可溶性蛋白质含量差异不显著外,其它指标差异均达显著水平;而相对对照,复水后2种牡丹的渗透调节物质含量升高,但差异均不显著。2种牡丹的MDA含量在复水后比重度干旱胁迫时有所降低,均达差异显著水平;而与对照进行比较,差异不显著。
Taking “Luoyang Red” and “Wulong Pin Sheng” Peony potted seedlings as test materials, the changes of osmotic adjustment substance and MDA content in leaves of Peony were studied during the process of gradual drought and rewatering. The results showed that with the increase of water stress, the content of soluble protein of two kinds of peonies increased firstly and then decreased; the soluble sugar content, proline content and MDA content of two kinds of peonies tended to increase gradually. Compared with severe drought stress, the content of osmotic adjustment substance of two species of peony decreased after rewatering, except for the difference of content of soluble protein in “Oolong Pin Sheng” was not significant, but the other indexes all reached significant level; Compared with the control, the content of osmotic adjustment substance of two kinds of peony increased after rewatering, but the differences were not significant. The contents of MDA in two species of peony were lower than those under severe drought stress after rewatering, all of which reached the significant difference. However, the difference was not significant compared with the control.