The oval kumquat (Fortunella margarita) «Nagami» is a citrus relative belonging to theRu- taceae family. Pigment changes in the whole fruit were investigated at four stages of ripening. During ripening the chlorophylls gradually decreased, disappearing completely in the ripe fruits. The total carotenoid content decreased from 18.7 ¿ig/g to 14.6 /¿g/g and then increased to a level of 38.6 /ig/g in the ripe fruit. The chloroplast carotenoid pattern of the unripe fruit changed gradually into a complex chromoplast pattern in which epoxides predominated, as found in citrus. The major pigment was violaxanthin followed by cryptoxanthin accompanied by its numerous epoxides. The third major pigment was citraurin, a C3o븅apocarotenal so far found only in citrus, especially in flavedo ofCitrus reticulata and considered genus specific. Uncommon and characteristic ofFortunella margarita is its capacity to synthesize citraurin both in pulp and peel. The ultrastructural changes involved the chloroplast-chromoplast transformation. Unusual ultrastructural features which may be unique toFortunella are observed.

译文

椭圆形金橘 (Fortunella margarita) «Nagami» 是属于taceae科的柑橘亲戚。在成熟的四个阶段研究了整个果实的色素变化。在成熟过程中,叶绿素逐渐减少,在成熟的果实中完全消失。总类胡萝卜素含量从18.7 ig/g降低到14.6/g,然后在成熟果实中增加到38.6 /ig/g的水平。未成熟果实的叶绿体类胡萝卜素模式逐渐转变为复杂的发色体模式,其中环氧化物占主导地位,如在柑橘中发现的那样。主要色素是紫黄质,其次是隐黄质,并伴有大量环氧化物。第三种主要色素是citraurin,这是迄今为止仅在柑橘中发现的一种C3o apapcarotenal,尤其是在柑橘网纹的flavedo中,被认为是特定的属。margarita的不常见和特点是它在纸浆和果皮中合成citraurin的能力。超微结构的变化涉及叶绿体-发色体的转化。观察到可能是fortunella独特的异常超微结构特征。

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