Electrical induction of lateral transport of 3-indoleacetic acid in the Avena coleoptile.
Electrical induction of lateral transport of 3-indoleacetic acid in the Avena coleoptile.
复制标题
燕麦胚芽鞘中 3-吲哚乙酸横向运输的电感应。
DOI：
10.1016/0003-9861(53)90441-x
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发表时间：
1953
影响因子：
3.9
通讯作者：
A. Schrank
中科院分区：
文献类型：
--
作者：
W. Webster;A. Schrank
1.1.用3-吲哚乙酸（IAA）处理的去头燕麦叶片对横向施加的直流电（20 μa）也表现出同样的曲率响应。2分钟）如先前在完整胚芽鞘中观察到的。这支持了IAA是燕麦中天然存在的生长素的论点。去头胚芽鞘对横向施加电流的曲率反应是需要IAA的生长反应。证据表明，这些曲率响应是由于IAA的重新分配所带来的横向运输。IAA的侧向运输是由植物组织中的极性状态引起的，而不是由外部施加的电流直接介导的。在组织中的功能极性的要求是由电极性，这是建立通过施加直流电，但不依赖于胚芽鞘中的IAA的存在。
1.1. DecapitatedAvenacoleoptiles supplied with 3-indoleacetic acid (IAA) show the same type of curvature response to transversely applied direct current (20 μa. for 2 min.) as previously observed in intact coleoptiles. This supports the contention that IAA is the naturally occurring auxin inAvena.2.2. Curvature responses of decapitated coleoptiles to transversely applied current are IAA-requiring growth responses.3.3. Evidence is presented which demonstrates that these curvature responses are due to IAA redistribution brought about by lateral transport.4.4. Lateral transport of IAA is brought about by a state of polarity in the plant tissue and is not directly mediated by the flow of externally applied current.5.5. The requirements of a functional polarity in the tissue are fulfilled by the electrical polarity, which is established by the application of direct current but is not dependent on the presence of IAA in the coleoptile.