摘要
以冕粳147、合系22-2两个粳稻品种为材料,研究Na2CO3胁迫对粳稻发芽和幼苗生长的影响。结果表明,当Na2CO3胁迫浓度≤20mmol/L时,对粳稻种子发芽和幼苗叶片和根系生长有一定促进作用,幼苗叶片中的叶绿素含量略增加;但随着Na2CO3胁迫浓度的增加,粳稻种子萌发和幼苗叶片和根系生长受抑制的程度增强。当Na2CO3胁迫浓度>60mmol/L时,幼苗叶片的叶绿素含量迅速下降,脯氨酸含量急剧上升。说明,粳稻种子萌发和幼苗生长对Na2CO3的耐受浓度为60mmol/L。
Effects of Carbonate Alkali stress on germination and seedling growth in Japonica rice were studied with two Japonica rice of Mianjing 147 and Hexi22-2. The results showed that when the concentrations of Carbonate Alkali below 20 mmol/L, the Carbonate Alkali stress has some facilitation to the germination and seedling growth of Japonica rice, and the chlorophyll contents of leaf was increased a little than that of control. But the degree of inhibition of the germination and the growth of leaf and root of Japonica rice was increased with increasing concentration of Carbonate Alkali. When the concentrations of Carbonate Alkali above 60 mmol/L, the chlorophyll contents of leaf was decreased rapidly, and the content of proline in leaf was rapidly increased. The results indicated that the tolerance concentrations of Carbonate Alkali was 60 mmol/L to germination and seedling growth of Japonica Rice.
出处
《西昌学院学报（自然科学版）》
2012年第3期23-26,共4页
Journal of Xichang University(Natural Science Edition)
关键词
粳稻
NA2CO3胁迫
发芽
幼苗生长
Japonica rice
Carbonate alkali stress
Germination
Seedling growth
