关键词: 番茄, 玉米, Na, K, 游离脯氨酸, 可溶性糖, 过氧化物酶, 叶绿素

Abstract: Tomato and maize seedlings were cultured in three kinds of solution (with K nil Na, with Na nil K, nil Na nil K) to evaluate the effects of Na or K on the growth and some physiological indexes of tomato and maize. The results showed that the contents of free proline of tomato and maize were lower and the contents of soluble sugars and the ratio of chla to chlb were higher when cultured in the solution with Na nil K than those cultured in the solution nil Na and nil K included. Na could promote the activity of peroxidase. It is concluded that Na instead of K can promote the growth of tomato and maize to a certain degree.

Key words: tomato, maize, Na, K, free proline, soluble sugar, peroxidase, chlorophyll