In vivo evidence for the involvement of phospholipase A and protein kinase in the signal transduction pathway for auxin‐induced corn coleoptile elongation
作者: Hanju YiDoonam ParkYoungsook Lee
作者单位: 1Dept of Life Science. Pohang Univ. of Science and Technology, Hyojadong San 31, Pohang 790–784. Korea.
刊名: Physiologia Plantarum, 1996, Vol.96 (3), pp.359-368
来源数据库: Wiley Journal
DOI: 10.1111/j.1399-3054.1996.tb00445.x
关键词: Acid growth theoryapoplast pHauxincornelongationphospholipase A. protein kinasesignal transductionZea mays
原始语种摘要: Auxin‐induced elongation of com coleoptiles is accompanied by cell wall acidification, which depends upon H+‐pump activity. We tested the hypothesis that phospholipase A and a protein kinase are involved in the pathway of auxin signal transduction leading to H+ secretion, and elongation of corn coleoptiles. Initially, the pH of the bath solution at 50–100 μm from the surface of a coleoptile segment (pHo) ranged between 4.8 and 6.6 when measured with an H+‐sensitive microelectrode. Twenty or 50 μ M lysophosphatidylcholine, 50 μ M linolenic acid or 50 μ M arachidonic acid induced a decline in pHo by 0.3 to 2.1 units. The effect was blocked by 1 m M vanadate, suggesting that lysophosphatidylcholine or linolenic acid induced acidification...
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关键词翻译
关键词翻译
  • coleoptile 胚芽鞘
  • elongation 伸长
  • auxin 茁长素
  • phospholipase 磷脂酶
  • protein 蛋白质
  • induced 感应的
  • transduction 转导
  • kinase 激酶
  • unsaturation 不饱和
  • apoplast 非原质体