Biology Department, Brookhaven National Laboratory, Upton, New York 11973.
Plant Physiol. 1971 Dec;48(6):760-4. doi: 10.1104/pp.48.6.760.
The flowering of Lemna perpusilla strain 6746 is inhibited by daily transfers to water for short periods during a sensitive phase. Supplementing the water with Ca(NO(3))(2) partially reverses the inhibition of flowering while MgSO(4) increases the inhibition. The inhibition by MgSO(4) is overcome by low concentrations of Ca(NO(3))(2). Flower-promoting activity was detected in water and in MgSO(4) solutions that had been incubated with plants under dark but not light conditions. The prevention of this effect by light appears to be photosynthetic rather than to depend on phytochrome. The activity is destroyed by autoclaving but not by brief boiling. This loss of a flower-promoting material may explain the inhibiting effect on flowering by transfers to water.
小无根浮萍 6746 品系的开花受到在敏感阶段将其转移到水中并短时间停留的抑制。向水中补充 Ca(NO3)2 可部分逆转开花的抑制,而 MgSO4 则增加抑制作用。低浓度的 Ca(NO3)2 可克服 MgSO4 的抑制作用。在黑暗而非光照条件下,用植物培养过的水和 MgSO4 溶液中检测到有促进开花的活性。光照对这种效应的抑制似乎是光合作用的,而不是依赖于光敏色素。该活性可被高压灭菌破坏,但不能被短暂煮沸破坏。这种促进开花物质的丧失可能解释了转移到水中对开花的抑制作用。