生长素控制玉米中胚轴高尔基体定位的葡聚糖合成酶活性。

Auxin controls Golgi-localized glucan synthetase activity in the maize mesocotyl.

机构信息

Department of Biological Sciences, Stanford University, 94305, Stanford, CA, USA.

出版信息

Planta. 1982 Dec;156(4):309-13. doi: 10.1007/BF00397468.

Abstract

Decapitation or red light irradiation (R) inhibited growth and Golgi-localized glucan synthetase (GS I) activity in the mesocotyl of intact maize (Zea mays L.) seedlings. Applied auxin (indole-3-acetic acid) prevented the effects of R and of decapitation on both growth and GS I. Auxin applied several hours after irradiation prevented any further decline in GS I but did not restore it. Mesocotyl segments incubated in solution elongated in response to auxin but lost GS I with time regardless of the presence of exogenous auxin. An attached seed was necessary for maintenance of GS I in the dark-grown mesocotyl.

摘要

去顶或红光照射（R）抑制了完整玉米（Zea mays L.）幼苗中中胚轴的生长和高尔基定位的葡聚糖合成酶（GS I）活性。施加的生长素（吲哚-3-乙酸）可防止 R 和去顶对生长和 GS I 的影响。在照射后数小时施加的生长素可防止 GS I 的进一步下降，但不能使其恢复。在溶液中孵育的中胚轴段对生长素的反应伸长，但无论是否存在外源生长素，都会随时间的流逝而失去 GS I。在黑暗中生长的中胚轴中，附着的种子是维持 GS I 的必要条件。