Chemical Studies on movement and sensivility in plants

植物运动和敏感性的化学研究

基本信息

批准号：
09101001
负责人：
YAMAMURA Shosuke
金额：
$ 121.6万
依托单位：
Keio University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Specially Promoted Research
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

Phototropism has been known to be caused by a lateral gradient of growth-promoting auxin in the bending organ (Cholodny-Went theory). In contrast to the C.-W. theory, Brinsma and Hasegawa recently found that the shaded half did not contain more auxin than the illuminated ones. Instead it was found that the even distribution of auxin was accompanied by a lateral gradient of growth inhibitory substances during phototropic curvature. We have isolated some photo-induced growth inhibitory substances related to phototropism. 6-Methoxy-2- benzoxazolinone from light-grown maize (Zea mays L.) shoots was proved to inhibit the interaction between auxin and ABP1, the primary structure of which was determined, resulting in the growth inhibition in the illuminated side. Our present study has led to a new theory of "phototropism".Many plants close their leaves at night and open during daytime. Such a circadian rhythm has been known to be controlled by their internal clock. We were able to isolate each pair of leaf-closing and -opening substances from five different species. Of the pair, one of them was found to be β-D-glucoside. The leaf movement of these plants is due to the balance of concentration between them, which is controlled by the activation of β-D-glucosidase. Based on our extensive study, a new mechanism of leaf movement has been presented.In the case of Mimosa pudica, we could isolate a true active stimulant (activity : ca. 10-8〜10-9M) from the same plant, which consists of three components (potassium L-malate, magnesium transaconitate and dimehylammonium salt) in addition to the pair of leaf-closing and opening substances related to circadian rhythm.

已知照片是由弯曲器官中生长促进生长素的横向梯度引起的（胆田理论）。与C.-W。相反理论，Brinsma和锤瓦最近发现，阴影的一半没有比发光的生长素更多。相反，发现生长素的均匀分布伴随着光曲率期间生长抑制物质的横向梯度。我们已经分离了一些与光核有关的光诱导的生长抑制物质。事实证明，从光生长的玉米（Zea Mays L.）芽产生的6-甲氧基-2-苯佐唑唑氨酸酮可以抑制生长素和ABP1之间的相互作用，该结构的主要结构是确定的，从而导致照明侧的生长抑制。我们目前的研究导致了一种新的“光子主义”理论。许多植物在晚上关闭叶子，白天开放。众所周知，这种昼夜节律是由其内部时钟控制的。我们能够从五个不同的物种中分离每对切叶和开放物质。在这对中，发现其中一个是β-D-葡萄糖苷。这些植物的叶片运动是由于它们之间的浓度平衡，这是由β-D-葡萄糖苷酶的激活控制的。基于我们的广泛研究，已经提出了一种新的叶子运动机制。在含羞草pudica的情况下，我们可以与同一植物分离出真正的主动刺激物（活动：10-8至10-9m），这些植物由三个成分（由三氯酸钾，镁，镁含量和dimehymhammon盐）组成。