Abstract
The intercalary meristem and surrounding tissues of the gene induced plastome mutant 'albostrians' of Hordeum vulgare L. were examined in the electron microscope for ultrastructural evidence of membrane continuities between plastids and mitochondria. In well developed tissues the ribosome-deficient plastids were usually in close proximity or appressed to mitochondria of normal appearance. In some sections through the meristemmatic region however the relationship between the two organelles was observed to be of a fused nature. These conjoinings are thought to be similar to those reported in normal living cells using cinephotomicrography but never before observed by transmission electron microscopy.
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