Other Plant Substances
Substances, the increase of which is desired. This holds true for the sugar content in sugar cane (Jagathesan 1976) or the content of ascorbic acid in fruits of black currants (Gröber 1967).
Substances, which should be removed. An impressive example is a toxic substance in Lathyrus sativus (BOAA; Nerkar 1971, 1972) or bad tasting alkaloids in Lupinus. As far as information is available, research work in this field seems to be worthwhile. Several mutants with reduced alcaloid content in the genus Lupinus are known (Zachow 1967; Pakendorf 1974; Byth 1975).