| 摘要: |
| 小麦根细胞质膜上存在NADH-K3Fe(CN)6氧化还原酶。KCN、SHAM及Na3VO4对其活性无影响,DCCD对其有轻微抑制作用。干旱胁迫下,抗旱性不同的两品种小麦根质膜NADH-K3Fe(CN)6氧化还原酶变化趋势相似。小麦根存在跨膜K3Fe(CN)6还原系统。干旱胁迫下,K3Fe(CN)6还原活力下降,但能促进陕合6号小麦根的H+分泌和K+累积。 |
| 关键词: 小麦，氧化还原系统，干旱胁迫，K+累积 |
| DOI： |
| 分类号:Q544 |
| 基金项目:农业部“八五”应用基础研究资助项目 |
|
| The Responses of Wheat Root Plasma Membrance Redox System to Water Stress and its Relationship to K+ Accumulation |
|
Cao Cuiling Gao Junfeng Cao Wei,Cao Cuiling Gao Junfeng Cao Wei,Cao Cuiling Gao Junfeng Cao Wei
|
| Abstract: |
| Marked activity of NADH-ferricyanide oxidoreductase has been found in
plasma membrance from wheat roots.KCN,SHAM and Na3Vo4 have no influence on the
activities of this redox system,but 10Lmol/L DCCD inhibits the activity of this system
slightly.The NADH-ferricyanide activity of two winter wheat cultivars with different
drought resistance shows similar changing trends under water stress.The activity of
ferricyanide reductase is declined under the water stress.But,accompanying ferricyanide
reductase activity exists an apparent excretion of H+ and a stimulation of K+ influx. |
| Key words: wheat,oxidoreductase system,water stress |
