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摘要新梢打顶后留下成熟叶和越冬叶的光合机能影响的研究 1)嫩梢打顶后,留下的成熟叶光合值和叶绿素、全氮和水溶性旦白质量也同光合值一样逐渐地降低。叶绿素含量依然不变。光合值的变化与水溶性旦白质量高度相关。 2)至于越冬叶,甚至嫩梢打顶后,三种化学成分增加或维持不变。然而,它们的光合值如对照植株那样,缓慢地下降,三种化学成分随侧芽的生长而降低。 3)处理植株的成熟叶和越冬叶,1.5—二硷酸核酮糖羧化酶酶活性比那些对照植株梢高。它们在叶片老化时也不降低。 4)处理植株的越冬叶,光合值的降低与测定的任一成分的关系还不清晰。
Abstract Studies on the Photosynthetic Functions of Mature Leaves and Overwintering Leaves after Topping Tops 1) The leaf photosynthesis value, chlorophyll content, total nitrogen and water-soluble protein content of mature leaves remained the same with photosynthetic rate Gradually lower. Chlorophyll content remains unchanged. The change of photosynthesis value is highly correlated with the quality of water-soluble protein. 2) As for the overwintering leaves, even after the tops of young shoots are thickened, the three chemical compositions increase or remain unchanged. However, their photosynthetic rate slowly decreased as in the control plants, and the three chemical components decreased with the growth of the lateral shoots. 3) Treating mature and wintering leaves of plants, the activity of ribulose carboxylase 1.5-bisulphite was higher than that of the control plants. They do not decrease when the leaves age. 4) Treatment of the overwintering leaves of plants, the relationship between the decrease in photosynthetic rate and any one of the components measured is not clear.