摘要
研究了油菜(Brassica napus)的萌发特性及幼苗生长对不同质量浓度(80、160、320、640、960 mg.L-1)氯化铯(CsCl)处理的效应。结果显示:ρ(CsCl)为80～960 mg.L-1时,其对油菜发芽率、发芽势、发芽指数的影响差异不显著,但对油菜幼苗根、芽生长具有"低促高抑"的双重作用,且根的生长比芽对CsCl更为敏感。随着ρ(CsCl)逐渐增加,油菜幼苗脯氨酸和蛋白质含量增加,脱氢酶(DH)活性和过氧化物酶(POD)活性则明显下降,表明较高ρ(CsCl)处理可能造成油菜幼苗一定程度的胁迫,其脯氨酸含量增加可能主要是由于脯氨酸合成加强所致。
Effects of CsCl on germination and metabolism of rapeseeds as affected by CsCl concentration（80,160,320,640,and 960 mg·L-1） were studied.Results show that CsCl did not have much effect on germination rate（GR）,germination potential（GP） and germination index（GI） in the experiment,regardless of its concentration,but stimulated the growth of roots and buds of seedlings when it was low in concentration and suppressed the growth when it was high.What is more,roots of the seedlings were more sensitive than buds.With rising CsCl concentration,the contents of protein and proline increased but the activities of dehydrogenase（DH） and peroxidase（POD） decreased in the seedlings,indicating that excessive Cs＋ may affect the growth and metabolism of the seedlings of rape plant,and the increase in proline content may be attributed to enhance proline synthesis.
出处
《生态与农村环境学报》
CAS
CSSCI
CSCD
北大核心
2011年第2期64-68,共5页
Journal of Ecology and Rural Environment
基金
国家科技支撑计划(2007BAB18B08-01)
关键词
铯
油菜
脯氨酸
脱氢酶
过氧化物酶
Cs
rape（Brassica napus）
proline
dehydrogenase
peroxidase
