Effects of a polychlorinated biphenyl (aroclor 1242) on the ultrastructure of frond cells in the aquatic plantSpirodela oligorrhiza(Kurt) Hegelm

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Abstract
Thin sections of polychlorinated biphenyl (PCB)-treated and untreated fronds of Spirodela oligorrhiza have been studied by electron microscopy. In treated samples the chlorotic tissue shows almost complete disorganisation of internal structure of the chloroplasts. Pale green areas of the same sample present an intermediate stage of this breakdown process and the plastids resemble chloroplasts. However, the organisation of other cell components is largely unaffected by PCB and resembles that of control plants.