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Bulletin of Botanical Research ›› 2018, Vol. 38 ›› Issue (6): 860-868.doi: 10.7525/j.issn.1673-5102.2018.06.009

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Comparison of Reproductive Biology Including Morphology of Reproductive Organs,Viability of Pollens,Flower Visitors,and Flavonols Accumulation Between Fertile and Sterile Cultivars in Bougainvillea

XU Su-Xia1, HUANG Qing-Yun1, LIN Chun-Song1, XU Yi-Ding2, LI Zi-Yang3, LIU Yu-Mei4, HUANG Yi-Jin5   

  1. 1. Key Laboratory of Fujian Provincial Subtropical Plant Physiology & Biochemistry, Fujian Institute of Subtropical Botany, Xiamen 361006;
    2. School of Landscape Architecture, Beijing Forestry University, Beijing 100083;
    3. Department of Agriculture, Northeast Agricultural University, Harbin 150030;
    4. Plant Introduction & Quarantine and Plant Product Key Laboratory of Xiamen City, Xiamen Overseas Chinese Subtropical Plant Introduction Garden, Xiamen 361002;
    5. The First Affiliated Hospital of Xiamen University, Xiamen 361003
  • Received:2018-03-12 Online:2018-11-15 Published:2018-11-01
  • Supported by:
    This study was supported by the National Natural Science Foundation of China(31071814;31372093);Xiamen Science & Technology Project(3502Z20172015);Xiamen Creation Plantform of Science & Technology(3502Z20131004)

Abstract: Plants in Bougainvillea are characterized with high sterility. In this study, morphology of reproductive organs, viability of pollens, flower visitors, and flavonols accumulation were compared between two sterile and four fertile cultivars. The calyx in four fertile cultivars was oval and bigger than that in other sterile cultivars. Pollens were size-consistent in fertile cultivars. Viability of pollens with 11.1 to 46.5 germination rate in fertile cultivars was much higher than that in the sterile. Seven kinds of insect visitors were found in six cultivars, which displayed no discrimination among various cultivars. The results indicated that kaempferol/and quercetin/glycosylated derivatives were the major flavonols accumulating in pollens using the florescence dye, diphenylboric acid 2-aminoethyl ester (DPBA). Florescence strength in tips of pollen tubes was much robuster than that in other parts. Accumulation of flavonols resulted in sharp difference between fertile cultivars and sterile cultivars in the study, which suggested that flavonols especially quercetin might play positive roles in fertility of plants in Bougainvillea.

Key words: Bougainvillea, fertility, pollen, viability, flavonol

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