| 低温胁迫对水稻幼苗PEP羧化酶的影响 |
| |
| 引用本文： | 何洁, 刘鸿先,. 低温胁迫对水稻幼苗PEP羧化酶的影响[J]. 广西植物, 1988, 0(3): 285-287 |
| |
| 作者姓名： | 何洁 刘鸿先 |
| |
| 作者单位： | 中国科学院华南植物研究所 广州(何洁)，中国科学院华南植物研究所 广州(刘鸿先) |
| |
| 摘 要： | 水稻幼苗经低温(0℃)处理后,叶片中PEP羧化酶活性明显地降低.Km值增大。经1—2天低温处理者,增加反应底物的浓度,有减少PEP羧化酶活性降低的幅度;当低温伤害严重时(0℃4天),这种效应则消失。这些结果表明:水稻叶片中PEP羧化酶对低温反应是敏感的,其活性的下降是由于该酶对底物的亲和力的降低。
|
| 关 键 词： | 低温胁迫 水稻幼苗 PEP羧化酶 |
THE EFFECT OF CHILLING STRESS ON PEP-CARBOXYLASE IN RICE SEEDLINGTHE EFFECT OF CHILLING STRESS ON PEP-CARBOXYLASE IN RICE SEEDLING |
| |
| He Jie and Liu Hong-xian. THE EFFECT OF CHILLING STRESS ON PEP-CARBOXYLASE IN RICE SEEDLINGTHE EFFECT OF CHILLING STRESS ON PEP-CARBOXYLASE IN RICE SEEDLING[J]. Guihaia, 1988, 0(3): 285-287 |
| |
| Authors: | He Jie and Liu Hong-xian |
| |
| Abstract: | After chilling treatment(0℃),the decrease of PEP-carboxylase activity in rice leaves was obvious with the increased Km value.The postponement of the dip in PEP-carboxylase activity followed by the lift in the substrate concentration after 1-2 days chilling treatment,but no postponement after 4 days chilling treatment were found.These results showed that PEP-carboxylase in rice leaves was sensitive to chilling due to the decrease in affinity of the enzyme to the substrate.After chilling treatment(0℃),the decrease of PEP-carboxylase activity in rice leaves was obvious with the increased Km value.The postponement of the dip in PEP-carboxylase activity followed by the lift in the substrate concentration after 1-2 days chilling treatment,but no postponement after 4 days chilling treatment were found.These results showed that PEP-carboxylase in rice leaves was sensitive to chilling due to the decrease in affinity of the enzyme to the substrate. |
| |
| Keywords: | Chilling stress Rice seedling PEP-carboxylaseChilling stress Rice seedling PEP-carboxylase |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《广西植物》浏览原始摘要信息 |
|
点击此处可从《广西植物》下载全文 |
|
