摘要： 以新合成的NCT配制成不同浓度的水溶液,对灌浆初期的大田小麦进行叶面喷施,以喷清水作对照,并以与NCT相同浓度梯度的NAA水溶液作对比处理.测定了喷后不同时期小麦旗叶的相对电导率、叶绿素含量、超氧化物歧化酶(SOD)活力及丙二醛(MDA)含量.结果表明:NCT能延缓灌浆期SOD活力,使叶绿素含量降低,控制相对电导率和MDA含量的升高,并使小麦穗粒重和千粒重增加,其效果明显优于NAA.

关键词: 小麦, NCT, 相对电导率, SOD活力, 叶绿素含量, MDA含量, 穗粒重, 千粒重

Abstract: A series of solutions were made with newly synthesized N-(1-Naphthaleacetyl)-Nc-(2-Carboxy phenyl)Thiourea,which were used to spray upon wheat leaves at grain filling stage.The comparat ive treatments were carried out using NAA with the same concentrations as NCT and fresh water as control.The results were as follows: NCT throug hfoliage spraying could regulate the senescent process of winter wheat.It could suppress chlorophyll.sdegrading,keep the activity of SOD at high level,and decrease the membrane lipid peroxidation in later growing stage,so as to delay the functional leaf senescence.The grain weight per spike and thousand kernel weight of NCT treatments were strikingly higher than those of other treatments.Total effects of NCT were markedly better than those of NAA.

Key words: Triticum aestivum L, NCT, Relat ive conductivity, SOD activity, Chlorophyll content, MDA content , Grain spike weight , Thousand kernel weight

中图分类号: 

• S512