醉芙蓉花色变化的机理分析

Mechanism Analysis of Variety Corolla from Hibiscus mutabilis L

以醉芙蓉为材料,对花冠的日周期变色规律进行了调查,其花色由6:00的白色转为12:00的浅红,15:00以后变为深红色。用比色法对不同时间的花瓣进行了原花色素和花色素含量测定,结果表明:9:00以前的花冠虽然无色,但原花色素相对含量较高;11:00前后,由于原花色素开始转化为花色素,此时原花色素与花色素的含量差异减小;17:00以后,原花色素大多转为花色素,使花冠变为深红色。在花冠变色的过程中,光周期和花瓣水分对花冠变色无影响。因此推测,芙蓉花的变色可能是由于花瓣中的原花青素转化为花色素引起的,且这种呈色不具光依赖性。

The changing colour of cotton rose in one day circle was investigated. The colour changed from white at 6.. 00 to pink at 11：00, and after 17.00, it became deep red. The original pigment and pigment contents at different times were determined by comparing colour method. Although the crowns were colorless before 9：00, but the relative amount of original pigments were higher. From about 11.00, the difference of original pigment and pigment lessened due to the transformation from original pigment to pigment began. After 17： 00, the most of original pigments had shifted to pigment, so the colours of crowns became deep red. During the progress of the change colours, the circle of light and tile water amount of petal had no influence in crown＇s colour. Based on results, the colour change of drunken cotton rose was supposed to owing to the shift from original pigment to pigment and it is independent of light.