Feldman L J, Gildow V
Department of Botany, University of California, Berkeley 94720, USA.
Plant Physiol. 1984 Feb;74(2):208-12. doi: 10.1104/pp.74.2.208.
In certain cultivars of corn (Zea mays var. Merit), light stimulates gravitropic bending of the root by influencing events in the root cap. In this paper, we report on changes in root cap proteins which occur as a result of the light treatment and single out specific proteins as potentially having a role in mediating the gravitropic response. For this work, we have used root caps maintained aseptically in culture media supplemented with auxin. If auxin is deleted from the culture medium, the protein profiles observed following illumination differ from that seen in caps provided light while in auxin-supplemented media. We also report that several of the proteins for which synthesis is stimulated by light appear to turn over rapidly, usually within 0.5 hour of formation.
在某些玉米品种（玉米属优异品种）中，光照通过影响根冠中的生理过程来刺激根的向重力性弯曲。在本文中，我们报告了光照处理导致的根冠蛋白质变化，并挑选出特定蛋白质，它们可能在介导向重力性反应中发挥作用。在这项研究中，我们使用了在添加生长素的培养基中无菌培养的根冠。如果从培养基中去除生长素，光照后观察到的蛋白质谱与在添加生长素的培养基中光照处理的根冠所观察到的不同。我们还报告说，几种受光照刺激合成的蛋白质似乎周转很快，通常在形成后0.5小时内。
