Institut für Biologie II, Zellbiologie, Universität Freiburg, Schänzlestraße 1, D-7800, Freiburg i. Br., Federal Republic of Germany.
Plant Cell Rep. 1982 Apr;1(3):111-4. doi: 10.1007/BF00272366.
Plastoglobules have been isolated in pure form from petals of the pansy, Viola tricolor L. Their chemical composition has been determined up to a recovery of 96% dry weight. Triacyl glycerols (57%) as well as carotenoids and their esters (23%) are the main constituents. Polar lipids, proteins, alkanes, phytyl esters, plastid quinones, and steryl esters have been detected in smaller amounts (cf. Table 1). The mean diameter of chromoplast globules is 280±70 nm (corresponding to a volume of 11.7×10(6) nm(3)), their buoyant density 0.93 g cm(-3). The plastoglobules are devoid of a surrounding unit membrane. However, electron microscopical evidence and analytical data are consistent with a structural model envisaging the globules to consist mainly of an apolar core, covered by a 'half unit membrane' of polar constituents.
已从三色堇花瓣中纯态分离出质体小球体。已确定其化学组成，回收率达干重的 96%。三酰基甘油（57%）以及类胡萝卜素及其酯（23%）是主要成分。较小含量下已检测到极性脂类、蛋白质、链烷烃、植基酯、质体醌和甾醇酯（参见表 1）。有色体小球体的平均直径为 280±70nm（相当于 11.7×10(6)nm(3)的体积），其浮力密度为 0.93gcm(-3)。质体小球体没有周围的单位膜。然而，电子显微镜证据和分析数据与一个结构模型一致，该模型设想小球体主要由非极性核心组成，由极性成分的“半单位膜”覆盖。
