Diurnal variation of chloroplast tine structures of spinach
DOI:
https://doi.org/10.14720/abs.46.2.16670Keywords:
chloroplasts, serial sections, ultrastructure, volume, spinachAbstract
Complete chloroplasts and their fine structures were quantitatively analysed by means of ultrathin serial sections and digital image analysis in order to obtain precise ultrastructural data about diurnal adaptations of the organelles. During the daily course the average chloroplast volume increased from 31 µm3 in the morning to 44 µm3 in the evening. In the same time the absolute volumes of starch, thylakoids and plastoglobuli also increased, though to different extents. These observed differences in the diurnal behaviour of this organelles are essential for a precise evaluation of naturally occurring or stress induced changes in chloroplasts.
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