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Bulletin of Botanical Research ›› 2022, Vol. 42 ›› Issue (3): 475-482.doi: 10.7525/j.issn.1673-5102.2022.03.017

• Physiology and Ecology • Previous Articles     Next Articles

Variation of Flower Color and Pigment Contents of Mirabilis jalapa During Flowering

Bing ZHOU, Xiaohong YAN, Yihan LEI, Chao PENG, Lihua CHEN   

  1. School of Life Sciences,Jinggangshan University,Ji’an 343009
  • Received:2020-11-13 Online:2022-05-20 Published:2022-05-20
  • About author:ZHOU Bing(1977—),male,doctor,associate professor,engaged in plant ecology research.
  • Supported by:
    National Natural Science Foundation of China(31760122);Science and Technology Plan Project of Jiangxi Province(2018BBG78079);Science and Technology Plan Project of Jiangxi Educational Committee(GJJ180566)

Abstract:

Mirabilis jalapa, one of the widely distributed garden flowers in China, is rich in color, but the regulating mechanism of pattern and color of M. jalapa with different flower colors during flowering are still unclear. The color phenotype and pigment contents of the corolla of M. jalapa with different flower colors during flowering were which were tested by chromometer and ultraviolet-visible spectrophotometry respectively. The results showed that the corolla of purple red M. jalapa changed from light green to purple red from bud to bloom, and its values of lightness L* and hue b* decreased, but the values of hue a*, chromaticity C* and chromatic triangle h increased, the contents of chlorophyll decreased gradually, but the contents of carotenoid, anthocyanin and total flavonoid increased gradually respectively. The corolla of yellow M. jalapa changed from light green to yellow, had stable chlorophyll and total flavonoid contents, and higher carotenoid contents, its values of chromaticity C*, hue a* and b* at blooming period were the highest. The corolla of white M. jalapa changed from light green to white, its values of lightness L*, chromaticity C*, hue a* and b* and the contents of the chlorophyll at transitional period were the highest, the contents of anthocyanin and total flavonoids were low, but increased gradually with the flowering process, and the contents of carotenoid were stable. It could be concluded that there were differences in the patterns of color changes during the flowering of M. jalapa, which were closely related with the pigment changes.

Key words: Mirabilis jalapa, flower color, pigment, color appearance, adaptation

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