engleski

Chromoplasts in the sepals of Physalis alkekengi: The effect of norflurazon on chromoplast differentiation

The differentiation of chromoplasts in the sepals of Physalis alkekengi was studied by light- and electron-microscopy and pigment analyses. The development of the chromoplasts from the chloroplasts started about four weeks after anthesis and, within the next two weeks resulted in the formation of small electron-transparent crystalloids connected to plastoglobules. Treatment of the sepals with norflurazon, which inhibits beta-carotene accumulation, prevented the formation of the small crystalloids. Only numerous plastoglobules filled the chromoplasts. The results are discussed with regard to the already known action of some bleaching herbicides.

Physalis alkekengi L.; sepals; chromoplast differentiation; carotenoid crystalloid; norflurazone; ultrastructure

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