| Abstract: | Effects of nitrogen nutrition on the contents of chlorophyll and galactolipids in young and older leaves of oil-seed rape (Brassica napus L.) The effect of nitrogen nutrition upon chemical characteristics of chloroplasts from young and older leaves of oil-seed rape (Brassica napus L.) were investigated. Nitrogen influenced the chlorophyll content especially of older leaves. As compared to the optimum supply, the values of young leaves were only reduced at the extreme deficiency and the excessive supply. In contrast to the content of chlorophyll the amounts of monogalactosyl diglyceride of both young and older leaves depended strongly on N-supply. Generally, the amounts of digalactosyl diglyceride were not related to leaf-age and N-supply. With the exception of extreme deficiency the contents of linolenic acid in galactolipids were influenced by nitrogen mainly in older leaves. (Brassica napus L., N-supply, Leaf-age, Chlorophyll, Galactolipids) |
