Einfluß von Tetraphenylborat auf die Feinstruktur von Zellen der Maiswurzelspitze / Influence of Tetraphenylboron on Fine Structure of Cells of Corn Root Tips

Abstract

Treatment (1-3h) of corn root tips with 5 × 10-5ᴍ tetraphenylboron (TPB) caused characteristic changes of the membrane structure in the outer layers of the root cortex cells. The mitochondria had lost their inner structure. At the double membrane of the mitochondria and at the membrane plasmalemma, tonoplast, and endoplasmatic reticulum there appeared numerous osmiophilic globuli (ca. 50 nm). The permeability of the membranes seemed to be increased extremely. It is suggested that the lipoproteine complex of the membranes was destroyed by interaction of TPB with ammonium groups of the membrane constituents