Abstract
The phospholipid and sterol contents of plasma membranes isolated from stele and cortex of maize roots were compared. The major sterol present in both tissues was stigmasterol which was found in significantly higher quantities in the cortex (27.4 μg mg -1 membrane protein) compared to the stele (17.4 μg mg -1 ). Other sterols detected included sitosterol, campesterol and small quantities of cholesterol. The major phospholipids found were phosphatidylethanolamine (PE) and phosphatidylcholine (PC), with PC more abundant in the stele
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