Cytological changes associated with induction of anthraquinone synthesis in photoautotrophic cell suspension cultures of Morinda lucida

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Abstract
Differences in subcellular structures between anthraquinone-producing and non-producing cells were investigated using photoautotrophic and photoheterotrophic cell suspension cultures of Morinda lucida. Irregular or distorted plastids containing starch grains were observed in the anthraquinone-producing cells, together with a highly elongated rough endoplasmic reticulum. The possible participation of plastids and rough endoplasmic reticulum in the anthraquinone biosynthesis is discussed.