原生质体
豌豆
膜
普通大麦
萝卜
延伸率
水稻
植物种类
植物细胞
根尖
生物物理学
细胞壁
根冠
膜透性
化学
植物
离子运输机
渗透
磁导率
生物
禾本科
生物化学
材料科学
分生组织
开枪
冶金
极限抗拉强度
基因
作者
Shinya Ishikawa,Tadao Wagatsuma
出处
期刊:Plant and Cell Physiology
[Oxford University Press]
日期:1998-05-01
卷期号:39 (5): 516-525
被引量:102
标识
DOI:10.1093/oxfordjournals.pcp.a029399
摘要
No correlations were recognized between Al tolerance among four plant species, rice (Oryza sativa L.), maize (Zea mays L.), pea (Pisum sativum L.), and barley (Hordeum vulgare L.), in rank order of Al tolerance, and cation exchange capacities of root-tip (0-1 cm) cells or of their cell walls. The plasma membrane of root-tip of Al sensitive plant species (pea and barley) was considerably permeabilized with elongation of root in Al-free solution following 0.5 h pretreatment with Al. K+ release from and Al permeation into the protoplasts isolated from the root-tip of Al-sensitive plant species were more significant than those for Al-tolerant plant species (rice and maize) on 10 or 30 min treatment with Al. The permeability of the plasma membrane for protoplasts isolated from Al sensitive plant species was considerably increased by treatment with hy-potonic Al-free control solution following 10 min pretreatment with Al. To our knowlege, these are the most rapid responses to Al ions reported to date, i.e., within 0.5 h in whole plant and within 10 min in protoplast. These results suggest that a temporary contact with Al ions irreversibly alters the plasma membrane of root-tip cells of Al-sensitive plant species: the cells become more leaky and rigid due to binding of Al ions to the plasma membrane.
科研通智能强力驱动
Strongly Powered by AbleSci AI