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Cao Meng-Hui, Zhao Qiu-Yan, Wei Chun-Mei, Huang Hai-Quan, Huang Mei-Juan. Study on the flowering traits and breeding systems of three Impatiens species[J]. Plant Science Journal, 2022, 40(3): 291-301. DOI: 10.11913/PSJ.2095-0837.2022.30291
Citation: Cao Meng-Hui, Zhao Qiu-Yan, Wei Chun-Mei, Huang Hai-Quan, Huang Mei-Juan. Study on the flowering traits and breeding systems of three Impatiens species[J]. Plant Science Journal, 2022, 40(3): 291-301. DOI: 10.11913/PSJ.2095-0837.2022.30291
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Study on the flowering traits and breeding systems of three Impatiens species

  • College of Landscape Architecture and Horticulture Sciences, Southwest Research Center for Engineering Technology of Landscape Architecture State Forestry and Grassland Administration, Yunnan Engineering Research Center for Functional Flower Resources and Industrialization, Research and Development Center of Landscape Architecture and Horticulture Flowers, Southwest Forestry University, Kunming 650224, China

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This work was supported by grants from the National Natural Science Foundation of China (31860230, 32060364, 32060366), Major Science and Technology Projects in Yunnan Province (202102AE090052), Scientific Research Fund Project of Yunnan Education Department (2021Y264), Training Project for Young and Middle Aged Academic and Technical Leaders in Yunnan Province (2015HB046, 2018HB024) and Yunnan University Garden Plants and Ornamental Horticulture Science and Technology Innovation Team (51700204).

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  • Received Date: December 26, 2021
  • Revised Date: February 09, 2022
  • Available Online: October 31, 2022
  • Published Date: June 27, 2022
    Graphical Abstract
    • Abstract
  • The flowering phenologies, floral traits, and breeding systems of three Impatiens species (I. blepharosepala Pritz. ex Diels, I. chlorosepala Hand.-Mazz., I. rhombifolia Y.Q. Lu et Y.L. Chen) grown in a greenhouse were explored by morphological observation, scanning electron microscopy, and manual control of pollination. Results showed that the flowering phenology of the three species could be divided into six periods according to changes in floral morphological. The various plant flowering periods showed partial overlap and certain differences were found in floral traits, breeding indicators, pollen grains, and ovary micromorphology. Overall, the trends in pollen viability and stigma receptivity in the three species were unimodal. The breeding systems were facultative outcrossing, with characteristics of self-compatibility and pollinator requirement. Nectar volume and sucrose met the pollination needs of small-sized insects. The setting percentage in the control treatments were lower than those in the three artificial pollination treatments, the absence of phenomenon of self-pollination and apomixis in six control pollination treatments for the three species, and the highest setting percentage in the manual xenogamy and the lowest in the manual geitonogamy.
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    • References (32)
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